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Esko Verification Reference Guide
Esko VerificationReference Guide
Copyright
© Copyright 2016 Esko Software BVBA, Gent, BelgiumAll rights reserved. This material, information and instructionsfor use contained herein are the property of Esko Software BV-BA. The material, information and instructions are providedon an AS IS basis without warranty of any kind. There are nowarranties granted or extended by this document. Further-more Esko Software BVBA does not warrant, guarantee ormake any representations regarding the use, or the results ofthe use of the software or the information contained herein.Esko Software BVBA shall not be liable for any direct, indirect,consequential or incidental damages arising out of the use orinability to use the software or the information containedherein.The information contained herein is subject to change withoutnotice. Revisions may be issued from time to time to advise ofsuch changes and/or additions.No part of this document may be reproduced, stored in a database or retrieval system, or published, in any form or in anyway, electronically, mechanically, by print, photoprint, micro-film or any other means without prior written permissionfrom Esko Software BVBA.This document supersedes all previous dated versions.PANTONE®, PantoneLIVE and other Pantone trademarks arethe property of Pantone LLC. All other trademarks or regis-tered trademarks are the property of their respective owners.Pantone is a wholly owned subsidiary of X-Rite, Incorporated.© Pantone LLC, 2015. All rights reserved.This software is based in part on the work of the IndependentJPEG Group.Portions of this software are copyright © 1996-2002 The Free-Type Project (www.freetype.org). All rights reserved.Portions of this software are copyright 2006 Feeling Software,copyright 2005-2006 Autodesk Media Entertainment.Portions of this software are copyright ©1998-2003 DanielVeillard. All rights reserved.Portions of this software are copyright ©1999-2006 The BotanProject. All rights reserved.
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Copyright C
Part of the software embedded in this product is gSOAP soft-ware. Portions created by gSOAP are Copyright ©2001-2004Robert A. van Engelen, Genivia inc. All rights reserved.Portions of this software are copyright ©1998-2008 TheOpenSSL Project and ©1995-1998 Eric Young ([email protected]). All rights reserved.This product includes software developed by the Apache Soft-ware Foundation (http://www.apache.org/).Adobe, the Adobe logo, Acrobat, the Acrobat logo, Adobe Cre-ative Suite, Illustrator, InDesign, PDF, Photoshop, PostScript,XMP and the Powered by XMP logo are either registered trade-marks or trademarks of Adobe Systems Incorporated in theUnited States and/or other countries. Microsoft and the Microsoft logo are registered trademarks ofMicrosoft Corporation in the United States and other coun-tries.SolidWorks is a registered trademark of SolidWorks Corpora-tion. Portions of this software are owned by Spatial Corp. 19862003. All Rights Reserved. JDF and the JDF logo are trademarks of the CIP4 Organisation.Copyright 2001 The International Cooperation for the Integra-tion of Processes in Prepress, Press and Postpress (CIP4). Allrights reserved. The Esko software contains the RSA Data Security, Inc. MD5Message-Digest Algorithm. Java and all Java-based trademarks and logos are trademarksor registered trademarks of Sun Microsystems in the U.S. andother countries.Part of this software uses technology by Best Color Technolo-gy (EFI). EFI and Bestcolor are registered trademarks of Elec-tronics For Imaging GmbH in the U.S. Patent and TrademarkOffice.Contains PowerNest library Copyrighted and Licensed by Al-ma, 2005 – 2007.Part of this software uses technology by Global Vision. Art-Proof and ScanProof are registered trademarks of Global Vi-sion Inc.All other product names are trademarks or registered trade-marks of their respective owners. Correspondence regarding this publication should be for-warded to:
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Table of Contents
Chapter 1. Copyright .............................................................................................................. 2
Chapter 2. Table of Contents ................................................................................................. 6
Chapter 3. Esko Verification ................................................................................................... 83.1. ISO support ........................................................................................................................................................................................... 83.2. Scope of delivery .................................................................................................................................................................................. 93.3. Starting Esko Verification ................................................................................................................................................................... 103.4. User interface ...................................................................................................................................................................................... 11
3.4.1. Program window ...................................................................................................................................................................... 113.4.2. Menus ........................................................................................................................................................................................ 123.4.3. Preferences dialog .................................................................................................................................................................... 16
3.5. Using Esko Verification ...................................................................................................................................................................... 213.6. Analyzing the results .......................................................................................................................................................................... 243.7. Evaluating the results in Automation Engine .................................................................................................................................. 33
Chapter 4. Troubleshooting ................................................................................................. 344.1. Esko Verification ................................................................................................................................................................................. 344.2. USB devices ......................................................................................................................................................................................... 354.3. Support ................................................................................................................................................................................................ 36
Chapter 5. Glossary .............................................................................................................. 38
Chapter 6. Index .................................................................................................................... 44
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Table of Contents T
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Chapter 1: Esko Verification
Esko Verification is a color checker tool. It enables you to mea-sure and compare two different sets of color values to ensurethat color accuracy is maintained.The software is extremely flexible and can be used to checkthe color accuracy of the following different output combina-tions:
• Profile-to-proof
• Proof-to-proof
• Proof-to-print
• Print-to-print
• Profile-to-printComparing profile-to-proof is one of the most useful applica-tions for Esko Verification. For example, in a normal everydaysituation, you can compare the color values of a proof that hasbeen created on your printer with those of the profile that sim-ulates the printing press used for the final print run. If themeasured color values are a good match, this indicates thatthe proof lies within the defined tolerances and therefore re-produces the printing process correctly.The measured values can be saved, so that the informationcan be shared easily, e.g. via e-mail, to verify the print quality.This makes Esko Verification ideal for use in both in-house andin remote environments.Please be aware that it is not possible to process grayscale orL*a*b* files in Esko Verification.
1.1 ISO support
Esko Verification supports the following norms:
• ISO 12647-7 (defines the requirements for contract proofing)
• ISO 12647-8 (defines the requirements for validation print)
• Fogra PSD Print CheckEsko Verification is, therefore, an indispensable tool to:
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Esko Verification 1
• verify a proof (or print) for ISO 12647-7, 12647-8, G7 compliance or do a Fogra PSD Print Check
• verify any house standard
• achieve Fogra Proof Certification
• verify color consistency across sitesThe following ICC profiles and characterization data sets areprovided:
The following offset reference characterization data sets areprovided:
1.2 Scope of delivery
Esko Verification is available as an add-on module for EskoProof.
Table 1:
Reference profile Characterization data set TIL
ISOcoated_v2_eci.icc FOGRA 39L 330%
ISOcoated_V2_300_eci.icc FOGRA 39L 300%
SC_paper_eci.icc FOGRA 40L 270%
Table 2:
Media wedge/IT8 chart Characterization data sets
Ugra/Fogra media wedge 2.2aUgra/Fogra media wedge 3.0a
Fogra39_MKCheck.it8 andFogra40_MKCheck.it8
IT8.7/4 Fogra39L_IT8.74.it8 andFogra40L_IT8.74.it8
IT8.7/3 Fogra39_IT8.73.it8 andFogra40_IT8.73.it8
ECI2002 Fogra39_ECI2002.it8 andFogra40_ECI2002.it8
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1.3 Starting Esko Verification
You can start Esko Verification by double-clicking the Esko Ver-ification shortcut on your desktop.
You can also start Esko Verification from Esko Proof:
• Choose Tools > Esko Verification
• Click the Esko Verification icon in the toolbar.
Program shortcut
Toolbar icon
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Esko Verification 1
1.4 User interface
1.4.1 Program window
User interface
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1 2
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1 Displays the first set of loaded or measured color values.
2 Displays the second set of loaded or measured color values for com-parison.
3 Displays a list of jobs received from Esko Proof.
4 2D view of color values. When you move the mouse cursor over a color, the corresponding value is highlighted in the M1/M2 table and in the color wheel. The appropriate delta E value is also highlighted.
5 The 2D view represents a cross-section of the L*a*b* color space. Using the slide bar, you can shift the cutting plane to show the a*b* dimensions for a particular L* value.
6 3D view. To rotate the 3D image, hold down the mouse button on the color wheel and move the cursor.
7 Enlarge 2D/3D view. In the 3D view, you can change the display set-tings.
8 Results area. Shows whether the measured values for delta E and paper white are within the defined values. Additional tabs show whether the measured values for delta E and paper white are within the tolerances defined for each color channel.
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1.4.2 Menus • File menu
• Open M1
Choose this command to load the first set of settings, e.g. a reference profile or a JDF or CSV file.
This menu command corresponds to the “Open” button for measurement 1.
• Open M2
Choose this command to load the second set of settings, e.g. a reference profile or a JDF or CSV file.
This menu command corresponds to the “Open” button for measurement 2.
• Save
Choose this command to save the displayed readings.
Your settings are saved in CSV format. A CSV file can be opened and edited in any spreadsheet application.
When you choose this command, the folder you defined as the data folder is automatically opened.
See also:
“Define default folders” on page 19
9 Shows the connection to the measuring device and allows calibrat-ing it.
10 Opens the Comparison Settings tab of the Preferences, where you can set verification tolerances.See also:“Comparison Settings” on page 19
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Esko Verification 1
- Screenshot
Choose this command to print an image of the current program window.
- Protocol
Select “Protocol” to print an overview of the achieved tolerances and print conditions using your default printer. When you choose this command, a dialog opens. Complete the form by adding job-specific information.
The printed protocol consists of a table comparing the reference and measured data of each color patch and
Printed protocol
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CMYK gradation curve diagrams depicting all reference and measured points along the curve.
The protocol contains ISO 12647-7-compliant information.
See also:
“Protocol” on page 30
- Label
Select “Label” to print out labels on any output device. When you choose this command, a window opens which displays the measured results. The label contains ISO 12647-7-compliant information.
See also:
“Label” on page 33
Label and protocol properties can be saved in *.prt format to the defined data folder. You can reload saved properties by clicking the appropriate button.
• Select printer
Choose this command to select a printer and make the desired printer settings. The printer you set up is the one used to print screenshots, protocols and labels.
• Login...
Choose this command to display the Login dialog. This command enables you to log in under a different user name or to log on to a different Server.
In the Macintosh version of the software, you will find the command in the Esko Verification menu.
• Preferences
Choose this command to open the Preferences dialog.
See also:
“Preferences dialog” on page 16
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Esko Verification 1
• Exit
Choose this command to exit Esko Verification. If you have not previously saved your settings, you will be prompted to do so before the program closes.
In the Macintosh version of the software, you will find the command in the Esko Verification menu.
• View menu
• Color space
With this command you select in which color space the measured readings will be displayed.
Choose between RGB, L*a*b*, XYZ, CIELCH or Density. L*a*b* is the default color space setting for this command.
“Density” is only available for selection if you have already measured and displayed color values. In a color-accurate proof, the displayed density values are comparable with the density values obtained during a production run. However, be aware that the density values of individual inkjet inks are not comparable with the density values of printing inks. This is because, for example, the cyan ink used in offset printing is different from the cyan ink used in an inkjet printer.
This function is also available via the context menu. To display the context menu, right-click the tables with the displayed M1 and M2 color measurements.
• Delta E format
With this command you select the color space in which the tolerance, i.e. the color deviation, between the two loaded sets of color values will be displayed. The tolerance is expressed as delta E values.
Choose between CIE 76, CMC, CIE 94 and CIE 2000 tolerancing.
This command is also available via the context menu. To display the context menu, right-click the delta E table.
If you have set verification options in your Esko Proof workflow, you have already set this option in System Manager.
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• Help menu
• Help
Choose this command to access online help.
• About
Choose this command to open a window with details of your program version.
In the Macintosh version of the software, you will find the command in the Esko Verification menu.
1.4.3 Preferences dialog To open the Preferences dialog, click Preferences in the Filemenu.
You have already set some of the options of this dialog in Sys-tem Manager, they are transferred to Esko Verification withthe job and displayed in this dialog.
Preferences dialog
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Esko Verification 1
• General
• Measuring device
Select the measuring device that you will use to measure your control strip. Depending on the device you choose, you will be able to set different options.
For example, you can choose to measure the color values of the control strip output with your proof (“Measure whole control strip”) or the color values of individual color patches (“Measure single patches”).
• Chart or wedge selection
Select the control strip, chart or wedge you want to use. You can see information regarding the layout and number of color patches in your chosen control strip.
IThe submenu for selecting a measuring device acts as a filter and ensures that only those charts and media wedges available for a particular device are listed.
If you are using a DTP20 measuring device, you are required to measure a TID patch before measuring the control strip. In most cases, this patch is printed out automatically with your print job. However, if you select an Ugra Fogra media wedge, you will need to print the TID patch separately. The file “-TIDforMKV20XP-V2.tif” is provided in the Tools folder for this purpose.
If the chart or wedge you want to use is not listed, you can click the “+” button to add the corresponding chart file (.it8).
• Characterization data
If you want to verify your proof against a standard (for example a Fogra MKCheck10 reference), select it here.
• Light source for spectral data conversion
Here you make the light (illuminant) setting for the conversion from spectrophotometric values to L*a*b* values. Choose between D50, D65 and C.
• Observer angle for spectral data conversion
Select an observer angle: two degrees is the default setting, but the larger viewing angle of ten degrees is sometimes used in the packaging or textile industry.
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• Monitor gamma
Select the gamma setting. The gamma setting adjusts how the M1 and M2 readings appear on your computer screen.
• User Interface
- Language
By default, Esko Verification is displayed in the language of the operating system, but you can change the language of the user interface here (in Windows). On Macintosh, you can change the language via the international settings in System Preferences.
- Enable Delta E warning indicator
When you select this check box, the amount of deviation from the defined tolerance values is illustrated in the delta E table. The following color code is used:
- Enable measurement approval
This setting enables you to approve measurement readings that are not within the defined tolerance values. If this check box is selected and you send results with the status “Not passed” back to Esko Proof, a message prompts you to confirm that you wish to approve the measurement results.
- Use system speaker for beep
By default, Esko Verification uses the beep tone from the operating system. If you deselect this check box, the beep tone from the measuring device is used instead.
Color Delta E value
White The color patch is within the permitted tolerance.
Yellow The color patch exceeds the permitted average toler-ance but is within the defined maximum tolerancevalue.
Red The color patch exceeds the defined maximum toler-ance value and causes a “not passed” result.
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Esko Verification 1
• Define default folders
Use this if you want to change the default folders that Esko Verification uses to save files and load characterization data.
• Barbieri measuring devices
Additional measuring mode settings are available if you use a Barbieri SpectroLFP or Spectro Swing measuring device.
Note that Barbieri measuring devices are only supported for Verification and not for Linearization.
• Comparison Settings
• Tolerance Limits
This is where you define the tolerances against which to check your proof’s colors. In the drop-down list, you can either select one of the presets (for example ISO 12647-7 Contract Proof “Media Wedge”) to check your proof against the tolerances defined in a specific standard, or select “Custom” to define your own color tolerances values.
- Working with a standard
When working with a standard, you can find predefined tolerance limits for ISO 12647-7 (contract proofing), ISO 12647-8 (validation proofing), G7-compliant verification of proof jobs, or for the Fogra PSD Print Check. They can be applied either to daily proof production (verification
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based on an ISO 12647-7 or 12647-8-compliant media wedge) or for certification purposes (such as FograCert), where “Media Wedge” as well as the “Chart” presets are required.
- Working with custom tolerances
When working with custom tolerances, you can save them as a preset. Click Save and define a unique name.
Select “Show preset in Esko Proof Client” if you want to use the tolerances in your preset in a verification workflow in the Esko Proof Client.
To create a preset for a dynamic wedge, select “Use for dynamic wedge”.
Depending on what you select, different categories of color tolerances will be available.
- General delta E limits
The Delta E tolerances for the color patches and the paper white. The Maximum for 95% of all patches tolerance excludes the worst 5% patches from the calculation.
- Primary color delta E limits
The Delta E tolerances for the CMYK patches only.
- Hue difference delta H limits
The Delta H tolerances for the CMYK, CMYKRGB and Gray patches. Delta H is the difference in hue between two colors. The generally accepted Delta H tolerances are a maximum of 1.5 for gray areas, and of 2.5 for primary colors.
- Tone value difference tolerance limits
The Delta T tolerance for the CMYK patches. Delta T is the colorimetric dot gain for primary colors (Delta T tolerances can only be measured for the primary colors, e.g. 100% cyan or 50% magenta. It is not possible to calculate delta T values for colors composed of a mixture of cyan, magenta, yellow and black.)
The general Delta T tolerance is a -5% to +5% tone value difference.
- Chromaticness difference delta Ch limits
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Esko Verification 1
The Delta Ch tolerance for the color patches. Delta Ch is the difference in saturation between two colors.
- NPDC delta L limits
Delta L is the difference in lightness between two colors. This is typically used to check a proof against Neutral Print Density Curves for G7.
When working with custom tolerances, you can select how to treat each tolerance:
- Normative
Normative values are evaluated. If any of the measurements lie outside the specified range of tolerance, Esko Verification will indicate that the result is not satisfactory and the job will fail the verification.
- Informative
Informative values are evaluated for reference purposes only and have no effect on whether the job passes or fails the verification. Only normative tolerances are taken into account. It means that a job can be successfully verified, even if an informative value exceeds the defined tolerance limits.
- Off
If you select "Off", the tolerance limit is not evaluated, and it is not included in the evaluation.
1.5 Using Esko Verification
Esko Verification can be used:
• To verify a proof (or print) for ISO 12647-7, 12647-8, G7 compliance or do a Fogra PSD Print Check
• To verify any house standard
• To achieve Fogra Proof Certification
• To verify color consistency
TO PROCESS A JOB IN AN ESKO VERIFICATION WORKFLOW
1 Send a job through your workflow with the Verification option on.
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2 Print the job.
After printing, the job file is automatically submitted to Esko Verification.
3 Start Esko Verification.
The printed job is displayed on the Job List/Preview tab.
4 On the Job List/Preview tab, expand the job entry and double-click the job file.
If you are comparing color results with the values from...
• a reference profile (for example if you have chosen to "Automatically load reference values" in the Automation Engine Pilot),
• Fogra characterization data,
then the appropriate target color values are loaded automatically as M1 values.
Esko Verification with Job List/Preview tab
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5 Measure the control strip that was printed out as part of the job.
If the workflow is set up to compare color values with a reference, the measured readings are displayed in the M2 table and the results of the comparison are displayed in the “Results” area.
If the workflow is set up to compare proof-to-proof, proof-to-print or print-to-print, the measured readings are displayed in the M1 table. You now need to measure the second proof or print. The second set of measured results is displayed in the M2 table and the results of the comparison are displayed in the “Results” area.
6 Compare the sets of results.
In the “Results” area, the job is marked as “passed” or “not passed”. A passed result indicates that the color accuracy has been verified and this result can be sent back to Esko Proof.
In some circumstances, you may wish to verify the color accuracy of a job with a “not passed” status, e.g. if the delta E values were only marginally exceeded. You can “force” a verified result by selecting the check box “Enable measurement approval” in the Preferences dialog of Esko Verification.
7 Click Send to transmit the results back to Automation Engine.
The results are displayed in the Automation Engine Pilot’s Tasks list.
If the color values were approved in Esko Verification, the job is displayed as “Verified”.
If the delta E values were not within the defined tolerances, the job is displayed as “Verification failed”. In this case, you need to recalibrate your device to make an optimized profile (or change the tolerances) then repeat the procedure.
See also:
“Analyzing the results” on page 24
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1.6 Analyzing the results
Once you have obtained M1 and M2 values, the evaluated re-sults are displayed in Esko Verification.
• Results areaThe Results tab contains a summary of the overall result. If anyof the measurements lie outside the specified range of toler-ance, Esko Verification indicates a result of “Not passed”.A check mark indicates that the overall measurement is withinthe tolerance limit. A cross warns you if some or all the mea-surements exceeded the maximum tolerance values.
Esko Verification with Job List/Preview tab
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Esko Verification 1
Pointing the mouse in the Results area displays the corre-sponding color patch in the M1/M2 tables.
The Delta E, Delta H, Delta T and Delta Ch tabs contain a de-tailed breakdown of the results and show exactly which colormeasurements were unsatisfactory for the primary colors.The number of tabs displayed depends on the delta toleranc-es you defined in the Esko Proof Client. For example, if you se-lected an ISO 12647-7 media wedge or G7, Delta T values arenot used. When measuring a dynamic wedge, only Delta E val-ues are evaluated.
Results
Delta E results
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• Delta E tableIn the delta table showing the achieved tolerances, you canuse the drop-down list in the table heading to switch betweendisplaying Delta E, Delta H, Delta T and Delta Ch values.
• Sorting result orderIf you have measured an ECI2002 random chart and want toevaluate it against a visually laid out IT8.7/4 chart, you can re-arrange the display order of the IT8.7/4 color patches for eas-ier comparison. Right-click on one of the charts and choose“Sort as reference data” from the context menu. All non-ECI2002 values are ignored and the visually laid out IT8.7/4color patches are rearranged so that they match the order ofthe random chart.The setting “Sort as reference data” makes it possible to com-pare any combination of IT8.7/4 chart and Fogra media wedgethat is selected as the control strip because only the Fogra me-dia wedge data is taken into account. Similarly, this setting en-ables you to use the FograCert_Proof Evaluation Testform toverify printing conditions whose characteristic data are onlyavailable as ECI2002 and not as IT8.7/4.
Delta E table
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Esko Verification 1
• 2D ViewerIn the 2D Viewer, “Show whole gamut” displays a cross-sectionof the L*a*b* color space at a specific L value. Use the slidebar, to move the cutting plane to show the a*b* dimensionsfor the desired L* value.
2D Viewer
1 Show 2D view
2 Enlarge 2D view
3 Cutting plane at L* = 50
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2
3
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• 3D ViewerThe 3D Viewer shows the full color gamuts of both sets ofmeasurement data. To open the 3D Viewer, first display a 3Dview, then click “Enlarge 3D view”.
You can drag the 3D model to rotate it. By viewing the 3D mod-el from all sides, you can see where the measured color valuesdo not fit into the color gamut of the reference.In the 3D Viewer you can define the following settings:
• M1/M2
Click on the appropriate tab to define the settings for displaying your M1 or M2 measurement values.
• Nodes
Select this check box to display the nodes of the individual color measurements. The color in which the nodes are displayed is indicated in the area next to the check box. To alter the default color, double-click on the colored area and select or define a color in the “Color” dialog.
3D Viewer
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Esko Verification 1
• Lines
Select this check box to connect the nodes of the individual color measurements. The color in which the lines are displayed is indicated in the area next to the check box. To alter the default color, double-click on the colored area and select or define a color in the “Color” dialog.
• Fill
Select this check box to display the represented color space as a solid form. The color in which the solid form is displayed is indicated in the area next to the check box. To alter the default color, double-click on the colored area and select or define a color in the “Color” dialog.
• Transparency
This slider allows you to define the degree of transparency for M1 or M2 values.
• Visible
Select this check box to show or hide the pictorial diagram of M1 or M2 values. This setting has the same effect as the “Show in color space” check boxes.
• Background color
Click the colored area to open the “Color” dialog and select or define the background color of the 3D Viewer.
• Color disk
When this check box is selected, the color disk is displayed in the 3D Viewer. Deselect this check box to hide the color disk.
• Full color gamut
Select this check box to apply the full color gamut to the displayed measured values. This setting overrides the “Fill” setting made in this dialog. It is only available in conjunction with the setting “Smooth”.
• Smooth
Select this check box to smooth the edges of the displayed measured values.
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• Enable projection
Select this check box to activate the “Projection point” button.
• Projection Point
Click this button to open a dialog in which you can define an L*a*b* value to be compared with M1 or M2. The defined node is displayed in the 3D Viewer. If the color lies outside the depicted color gamut, a line is drawn to illustrate the point to which the color would be mapped.
• Set defaults
Click this button to return all the settings in this dialog to their default values.
• Reset rotation
Using this setting rotates the 3D view to the same angle of rotation as the 2D view, i.e. it displays an a*b* view of the color gamut.
• Close
Click this button to close the 3D Viewer.
• ProtocolThe printed protocol includes ISO-12647-7-compliant infor-mation. It also displays CMYK gradation curve diagrams de-picting all reference and measured points along the curve.
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See also:
“Print” on page 13
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Printed protocol
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• LabelThe label includes additional ISO-12647-7-compliant informa-tion.
See also:
“Print” on page 13
1.7 Evaluating the results in Automation Engine
Once a job is sent back to Automation Engine from Esko Veri-fication, the status of the job in the job list changes to “Veri-fied” or “Verification failed”.If the job has the status “Verification failed”, it means you needto optimize the profile. Afterwards, you need to reprint the joband repeat the verify procedure in Esko Verification.
Label
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Chapter 2: Troubleshooting
If you encounter problems while working with Esko Proof, tryperforming the suggested solutions. If the problem still per-sists, please contact Esko Support.
2.1 Esko Verification
Esko Verification will not launch in Windows
Cause: Data Execution Prevention may be deactivated.Remedy: Activate Data Execution Prevention. Proceed as
follows (the settings may vary slightly depending on your version of Windows):
1 Right-click on Computer and choose Properties from the context menu.2 Click Advanced system settings.3 In the System Properties dialog, select the Advanced tab.4 Click the Settings button for performance.5 In the Performance Options dialog, select the “Data Execution Prevention” tab.6 Select the radio button “Turn on DEP for essential Windows programs and services only”.
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Troubleshooting 2
2.2 USB devices
When I connect my USB measuring device to the computer, I am requested to install the device driver. Should the device driver not be detected automatically?
Cause: Occasionally the device driver may not be detected automatically when you connect the USB device to the computer.
Remedy: The device drivers are installed automatically with the software.
If the wizard prompts you to install the device driver from the DVD, browse to the USB Measurement Devices folder and select the appropriate device driver.
Why is my USB device not being detected?
Cause: The device driver may not be installed.Remedy: Install the device driver as follows:1 Right-click on Computer and choose Properties from the context menu.2 Click Advanced system settings.3 In the System Properties dialog, select the Hardware tab.4 On the Hardware tab, click Device Manager.5 Search for Universal Serial Bus controllers.6 Expand the list and search for the device that is not detected. Non-detected devices appear with a question mark next to them.7 Right-click on the device entry and choose Update Driver from the context menu.8 Download and install the current driver by selecting the recommended setting.
Alternatively, a list of manufacturer home pages is provided with Esko Proof in the Tools and Other folder.
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2.3 Support
If you run into difficulties while working with Esko Verificationand you cannot find the solution in this manual, please con-tact Esko for technical assistance. You will find the contact details for your region on the supportweb page: click this link or go to http://esko.com/support andclick Contact Support.Please make sure to provide the following information whencontacting Esko:
• Version name and release number of your software
• License information
• Printer model
• Operating system with version numberAny additional hardware and software you may have installed(e.g. ISDN boards, virus scanners, etc.)
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Troubleshooting 2
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Glossary
This glossary gives a brief explanation of the terms used in thismanual.
CColor temperature of 6,774 Kelvin, which corresponds to day-light.
CIE 94A tolerancing system utilizing three-dimensional ellipsoids ascontainers for color acceptance. CIE 94 is similar to CMC butlacks some of the hue lightness adjustments. CIE 94 colorshave 95% agreement with color differences as our eyes seethem. CIE 94 is used predominantly in the paint and coatingsindustry.
CIELABA color model based on the model proposed by the Commis-sion Internationale de l’Eclairage (CIE) in 1931 as an interna-tional standard for color measurement. In 1976, this modelwas refined and named CIELAB. L*a*b* color is designed to bedevice-independent and perceptually uniform. L*a*b* colorconsists of a luminance or lightness component (L*) and twochromatic components: the a* component (from green to red)and the b* component (from blue to yellow).
CIELCHA color space similar to CIELAB, which uses cylindrical coordi-nates of lightness, chroma, and hue angle instead of rectangu-lar coordinates.
CMCA tolerancing system based on CIELCH. It portrays colors asthree-dimensional ellipsoids and represents colors as they areinterpreted by the human eye. CMC colors have 95% agree-ment with color differences as our eyes see them. CMC is usedpredominantly in the textile industry.
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Glossary G
Compensation of plate characteristicA function to linearize a non-linear plate characteristic of one-bit files before they are processed in color management. Thisenables the use of media profiles that are based on linear con-tinuous-tone data.Producing a color-accurate proof from non-linear plate char-acteristics calculated into the one-bit files requires a mediaprofile that is based on the IT8 target using the non-linear one-bit files.
CSVA file format for saving color measurement results in Esko Ver-ification. A csv file can also be opened and edited in anyspreadsheet application.
Delta ChDescribes the distance between two colors in the CIE a*b* col-or space.
Delta EThe mathematically calculated distance in the CIE L*a*b* col-or space between two colors. Delta E is used to check total col-or tolerances in a color-management environment.
Delta HThe difference in hue. In a color wheel, hue is defined by theangle between two colors.
See also Hue
Delta H
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Delta TThe ISO 12647 norm defines delta T purely as a colorimetricvalue for dot gain — unlike the dot gain commonly referred toin printing houses, which is composed of an optical part (lighttrapping) and a mechanical part (dot spread).Dot gain can only be measured using pure primary colors. If,for example, the full-tone color Cyan is output on an inkjetprinter to simulate offset printing, it will not have the CMYKvalue 100, 0, 0, 0, but will also contain a percentage of magen-ta, yellow and black.
GammaThe ratio of the contrast range between original and repro-duction. A gamma value of 1 means that the original and copyproof have the same contrast range.
Halftone screeningA process by which a continuous-tone image is converted intoa pattern of regularly spaced dots. The individual dots all havethe same density, but vary in size. The color tone of a printedarea is dictated by the size of the printed dots — the larger thedots, the darker the reproduced color tone.
HueThe dominant wavelength of a color. A color system, or model,measures color by hue, saturation and luminance. The hue isthe predominant color, such as yellow or green, the saturationis the color intensity, and the luminance is the brightness.
L*a*b*See CIELAB
Quantity of colorA process to define the maximum quantity of ink for each inkchannel and so prevent colors from becoming oversaturatedand “bleeding”.
RGBThe additive color system used in digital cameras and comput-er monitors where red, green, and blue light is captured sepa-rately and then combined to create a full color image.
40
Glossary G
Tone valueThe amount that an ink halftone dot expands when applied tothe surface of a media, causing darker tones or stronger col-ors. This is usually a factor of the type of press and the absor-bency of the media.For example, screen printing increases density by about 15%,so an image with a 50% black fill would appear as approxi-mately 65% black after printing.
Total ink limitThe total ink limit describes the point at which a printer attainsits maximum color density.Most inkjet printers do not increase color density in a linearfashion. In many cases, the maximum color density isachieved at approximately 50%, as illustrated in the graph.
White pointIn printing, the white point describes the whiteness of the pa-per. In colorimetric terms, the white point is defined as thechromaticity of a white light source or other emissive object.The white point may be expressed in terms of correlated colortemperature or chromaticity coordinates.
XYZA device-independent color model developed by CIE (Commis-sion Internationale de l'Eclairage), in which RGB values aremathematically transformed into a system that uses x, y and z
Total ink limit
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as coordinates. While x and z values have no specific percep-tual correlation, the y value represents brightness (lumi-nance).
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Glossary G
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Index
D
delta E tolerances 19
E
Esko Verification Option 8
3D view 28delta E tolerances 19ISO support 8logging on 14measurement analysis 24, 12Preferences dialog 16printing results 13scope of delivery 9using in Esko Proof 21
I
ISO support 8
M
measurement analysis 24
S
Support 36
T
TroubleshootingEsko Verification 34USB devices 35
U
USB devicestroubleshooting 35
