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Guided Tour Report

Date post: 18-Feb-2016
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Generated with Pix4Dmapper Discovery version 2.0.83 Quality Report Important: Click on the different icons for: Help to analyze the results in the Quality Report Additional information about the sections Click here for additional tips to analyze the Quality Report Summary Project guided_tour Processed 2015-10-21 11:52:04 Average Ground Sampling Distance (GSD) 5.36 cm / 2.11 in Area Covered 0.0567 km 2 / 5.6688 ha / 0.0219 sq. mi. / 14.0151 acres Time for Initial Processing (without report) 05m:43s Quality Check Images not available Dataset 13 out of 13 images calibrated (100%), all images enabled Camera Optimization 0.48% relative difference between initial and optimized internal camera parameters Matching median of 6491 matches per calibrated image Georeferencing yes, 4 GCPs (4 3D), mean RMS error = 0.031 m Preview Figure 1: Orthomosaic and the corresponding sparse Digital Surface Model (DSM) before densification. Calibration Details Number of Calibrated Images 13 out of 13
Transcript
Page 1: Guided Tour Report

Generated with Pix4Dmapper Discovery version 2.0.83

Quality Report

Important: Click on the different icons for:

Help to analyze the results in the Quality Report

Additional information about the sections

Click here for additional tips to analyze the Quality Report

Summary

Project guided_tourProcessed 2015-10-21 11:52:04Average Ground Sampling Distance (GSD) 5.36 cm / 2.11 in

Area Covered 0.0567 km2 / 5.6688 ha / 0.0219 sq. mi. / 14.0151 acresTime for Initial Processing (without report) 05m:43s

Quality Check

Images not available

Dataset 13 out of 13 images calibrated (100%), all images enabled

Camera Optimization 0.48% relative difference between initial and optimized internal camera parameters

Matching median of 6491 matches per calibrated image

Georeferencing yes, 4 GCPs (4 3D), mean RMS error = 0.031 m

Preview

Figure 1: Orthomosaic and the corresponding sparse Digital Surface Model (DSM) before densification.

Calibration Details

Number of Calibrated Images 13 out of 13

Page 2: Guided Tour Report

Number of Geolocated Images 13 out of 13

Initial Image Positions

Figure 2: Top view of the initial image position. The green line follows the position of the images in time starting from the large blue dot.

Computed Image/GCPs/Manual Tie Points Positions

Page 3: Guided Tour Report

Figure 3: Offset between initial (blue dots) and computed (green dots) image positions as well as the offset between the GCPs initial positions (blue crosses) andtheir computed positions (green crosses) in the top-view (XY plane), front-view (XZ plane), and side-view (YZ plane).

Overlap

Number of overlapping images: 1 2 3 4 5+

Figure 4: Number of overlapping images computed for each pixel of the orthomosaic. Red and yellow areas indicate low overlap for which poor results may be generated. Green areas indicate an overlap of over 5 images for every pixel. Good

quality results will be generated as long as the number of keypoint matches is also sufficient for these areas (see Figure 5 for keypoint matches).

Bundle Block Adjustment Details

Number of 2D Keypoint Observations for Bundle Block Adjustment 83909

Page 4: Guided Tour Report

Number of 3D Points for Bundle Block Adjustment 29294Mean Reprojection Error [pixels] 0.110832

Internal Camera Parameters

CanonIXUS220HS_4.3_4000x3000 (RGB). Sensor Dimensions: 6.198 [mm] x 4.648 [mm]

EXIF ID: CanonIXUS220HS_4.3_4000x3000

FocalLength

PrincipalPoint x

PrincipalPoint y R1 R2 R3 T1 T2

InitialValues

2839.640 [pixel]4.400 [mm]

2019.760 [pixel]3.129 [mm]

1547.000 [pixel]2.397 [mm] -0.043 0.026 -0.006 0.001 0.002

OptimizedValues

2825.884 [pixel]4.378 [mm]

1994.342 [pixel]3.090 [mm]

1554.407 [pixel]2.408 [mm] -0.038 0.017 0.001 0.005 -0.000

The number of Automatic Tie Points (ATPs) per pixel averaged over all images of the camera modelis color coded between black and white. White indicates that, in average, more than 16 ATPs areextracted at this pixel location. Black indicates that, in average, 0 ATP has been extracted at this pixellocation. Click on the image to the see the average direction and magnitude of the reprojection errorfor each pixel. Note that the vectors are scaled for better visualization.

2D Keypoints Table

Number of Matched 2D Keypoints per ImageMedian 6491Min 3050Max 8416Mean 6455

3D Points from 2D Keypoint Matches

Number of 3D Points ObservedIn 2 Images 17993In 3 Images 5489In 4 Images 2415In 5 Images 1391In 6 Images 740In 7 Images 472In 8 Images 347In 9 Images 230In 10 Images 136In 11 Images 81

2D Keypoint Matches

Page 5: Guided Tour Report

Number of matches25 222 444 666 888 1111 1333 1555 1777 2000

Figure 5: Top view of the image computed positions with a link between matching images. The darkness of the links indicates the number of matched 2D keypointsbetween the images. Bright links indicate weak links and require manual tie points or more images.

Geolocation Details

Ground Control Points

GCP Name Accuracy XY/Z [m] Error X [m] Error Y [m] Error Z [m] Projection Error [pixel] Verified/MarkedGCP34 (3D) 0.020/ 0.020 0.029 -0.010 0.035 1.096 3 / 3GCP35 (3D) 0.020/ 0.020 -0.017 0.020 0.016 0.733 5 / 5GCP36 (3D) 0.020/ 0.020 0.001 -0.017 0.012 0.324 2 / 2GCP37 (3D) 0.020/ 0.020 0.004 -0.017 -0.125 1.264 3 / 3Mean [m] 0.004045 -0.006013 -0.015420Sigma [m] 0.016347 0.015152 0.064052RMS Error [m] 0.016840 0.016301 0.065882

Localisation accuracy per GCP and mean errors in the three coordinate directions. The last column counts the number of images where the GCP has beenautomatically verified vs. manually marked.

Absolute Geolocation Variance

0 out of 13 geolocated and calibrated images have been labeled as inaccurate.

Min Error [m] Max Error [m] Geolocation Error X [%] Geolocation Error Y [%] Geolocation Error Z [%]- -15.00 0.00 0.00 0.00-15.00 -12.00 0.00 0.00 0.00-12.00 -9.00 0.00 0.00 0.00-9.00 -6.00 0.00 0.00 0.00-6.00 -3.00 7.69 7.69 0.00-3.00 0.00 38.46 46.15 69.230.00 3.00 53.85 46.15 30.773.00 6.00 0.00 0.00 0.006.00 9.00 0.00 0.00 0.009.00 12.00 0.00 0.00 0.0012.00 15.00 0.00 0.00 0.0015.00 - 0.00 0.00 0.00Mean [m] -0.181623 -0.263588 0.844007

Page 6: Guided Tour Report

Sigma [m] 1.993578 2.262223 0.816624RMS Error [m] 2.001834 2.277528 1.174403

Min Error and Max Error represent geolocation error intervals between -1.5 and 1.5 times the maximum accuracy of all the images. Columns X, Y, Z show thepercentage of images with geolocation errors within the predefined error intervals. The geolocation error is the difference between the intial and computed image

positions. Note that the image geolocation errors do not correspond to the accuracy of the observed 3D points.

Geolocation Bias X Y ZTranslation [m] -0.181623 -0.263588 0.844007

Bias between image initial and computed geolocation given in output coordinate system.

Relative Geolocation Variance

Relative Geolocation Error Images X [%] Images Y [%] Images Z [%][-1.00, 1.00] 100.00 100.00 100.00[-2.00, 2.00] 100.00 100.00 100.00[-3.00, 3.00] 100.00 100.00 100.00Mean of Geolocation Accuracy [m] 5.000000 5.000000 10.000000Sigma of Geolocation Accuracy [m] 0.000000 0.000000 0.000000

Images X, Y, Z represent the percentage of images with a relative geolocation error in X, Y, Z.

Georeference Verification

GCP Name: GCP34(2645179.683,1132492.342,714.556)

IMG_4109.JPGIMG_4110.JPGIMG_4117.JPG

GCP GCP34 was not marked on the following images(only up to 6 images shown). If the circle is too far awayfrom the initial GCP position, also measure the GCP in

these images to improve the accuracy.

IMG_4082.JPGIMG_4089.JPGIMG_4090.JPGIMG_4111.JPGIMG_4116.JPG

GCP Name: GCP35(2645181.267,1132427.704,710.632)

IMG_4082.JPGIMG_4088.JPGIMG_4089.JPGIMG_4110.JPGIMG_4111.JPG

GCP GCP35 was not marked on the following images(only up to 6 images shown). If the circle is too far awayfrom the initial GCP position, also measure the GCP in

these images to improve the accuracy.

IMG_4083.JPGIMG_4112.JPGIMG_4116.JPGIMG_4117.JPG

Page 7: Guided Tour Report

GCP Name: GCP36(2645120.890,1132344.425,713.047)

IMG_4083.JPGIMG_4112.JPG

GCP GCP36 was not marked on the following images(only up to 6 images shown). If the circle is too far awayfrom the initial GCP position, also measure the GCP in

these images to improve the accuracy.IMG_4087.JPGIMG_4088.JPGIMG_4115.JPG

GCP Name: GCP37(2645104.456,1132422.482,713.208)

IMG_4111.JPGIMG_4112.JPGIMG_4115.JPG

GCP GCP37 was not marked on the following images(only up to 6 images shown). If the circle is too far awayfrom the initial GCP position, also measure the GCP in

these images to improve the accuracy.

IMG_4082.JPGIMG_4083.JPGIMG_4087.JPGIMG_4088.JPGIMG_4116.JPG

Figure 7: Images in which GCPs have been marked (yellow circle) and in which their computed 3D points have been projected (green circle). A green circleoutside of the yellow circle indicates either an accuracy issue or a GCP issue.

Processing Options

HardwareCPU: Intel(R) Core(TM) i5 CPU M 460 @ 2.53GHzRAM: 4GBGPU: NVIDIA GeForce 310M (Driver: 9.18.13.4144), RDPDD Chained DD (Driver: unknown), RDP Encoder MirrorDriver (Driver: unknown), RDP Reflector Display Driver (Driver: unknown)

Operating System Windows 7 Ultimate, 64-bitCamera Model Name CanonIXUS220HS_4.3_4000x3000 (RGB)Image Coordinate System WGS84Ground Control Point (GCP)Coordinate System CH1903+ / LV95

Output Coordinate System CH1903+ / LV95Keypoints Image Scale Rapid, Image Scale: 0.25Advanced: Matching ImagePairs Aerial Grid or Corridor

Advanced: Matching Strategy Use Geometrically Verified Matching: noAdvanced: KeypointExtraction Targeted Number of Keypoints: Automatic

Advanced: Calibration Calibration Method: Standard, Internal Parameters Optimization: int_all, External Parameters Optimization: ext_all,Rematch: yes


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