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An introduction of combined An introduction of combined X-ray and laser range imaging X-ray and laser range imaging
system for bone fragments system for bone fragments detection in chicken filletsdetection in chicken fillets
Bin ZhuBin Zhu
Biological Resources EngineeringBiological Resources Engineering
Dec. 3, 2003Dec. 3, 2003
NotesNotes
Most the research are done by Dr. Most the research are done by Dr. Xin, Dr. Hansong and Dr. Tao, in Bio-Xin, Dr. Hansong and Dr. Tao, in Bio-imaging and machine vision lab, imaging and machine vision lab, Biological Resources Engineering Biological Resources Engineering Department. Department.
Most materials and data are from Most materials and data are from their work. their work.
BiosensorsBiosensors
Utilizing the absorption and reflection Utilizing the absorption and reflection characters of bio-materials to get characters of bio-materials to get internal information from them.internal information from them.
X-ray: AbsorptionX-ray: Absorption Laser: ReflectionLaser: Reflection
BackgroundBackground
USDA,2000
Boneless 48%
Bone-in 52%
32.5 billion pounds 32.5 billion pounds ofof
poultry poultry annuallyannually
Ⅰ Ⅰ X-ray technology X-ray technology and food inspectionand food inspection
Overview of X-ray imaging Overview of X-ray imaging
u: Materialsu: Materialsd: Thicknessd: Thickness
),(0),( yxudxx eIyxI
Typical applications of X-ray imaging Typical applications of X-ray imaging
Medical DiagnosisMedical Diagnosis
Homeland SecurityHomeland Security
Material ResearchMaterial Research
Industrial Inspections Industrial Inspections
Challenge of bone detection Challenge of bone detection
The thickness is unevenThe thickness is uneven The bone fragments are very tinyThe bone fragments are very tiny
Current solutionsCurrent solutions
Submerging the chicken meat in waterSubmerging the chicken meat in water
? cross contamination ? cross contamination Press the meat mechanicallyPress the meat mechanically
? shape damaged? shape damaged Dual energy X-rayDual energy X-ray
? physics limitation? physics limitation
QuestionsQuestions
How can we address the thickness How can we address the thickness variation problem directly? variation problem directly?
How can we extract the thickness How can we extract the thickness information from the uneven chicken information from the uneven chicken meat?meat?
ⅡⅡ Laser 3D imagingLaser 3D imaging
ApproachesApproaches
Time-Of-Flight (TOF) based technique Time-Of-Flight (TOF) based technique
Structured light based technique Structured light based technique
Structured light based techniqueStructured light based technique
The laser 3D imaging subsystemThe laser 3D imaging subsystem
Ⅲ Ⅲ Combined X-ray and Combined X-ray and Laser Imaging SystemLaser Imaging System
Overview of the combined systemOverview of the combined system
DigitizerDigitizer
Buffer 1
Buffer 1
Buffer 2
Buffer 2
Image ProcessorsImage Processors
AlgorithmsAlgorithms ControlControl
X-ray:
X-ray Controller
Image ProcessorsImage Processors
X-ray Generator
X-ray Detector
Computer
ImageMonitor
ComputerMonitor
Image Processor
Image Digitizer
CameraCamera
Laser:
Combined System Combined System X-rayLaserLaser
0.6m/sec
Laser 3D Image to X-ray Image Laser 3D Image to X-ray Image MappingMapping
X-ray image:X-ray image:
3D Laser image:3D Laser image:
),(0),( yxudxx eIyxI
),(),( yxkdyxI l
TransformationTransformation X-ray image:X-ray image:
3D Laser image:3D Laser image:
myxdkeIyxI yxudxx ),('][)],(log[ ),(
0
),(),( yxkdyxI l
myxIk
kyxI lx ),(
')],(log[
Thickness compensation Thickness compensation
Results Results
Results Results
Lasers Cameras
X-ray beam slit
Object
ResultsResults
ResultsResults
ResultsResults
Thank you!Thank you!