An introduction of combined X-ray and laser range imaging system for bone fragments detection in chicken fillets Bin Zhu Biological Resources Engineering Dec. 3, 2003

Notes Most the research are done by Dr. Xin, Dr. Hansong and Dr. Tao, in Bio- imaging and machine vision lab, Biological Resources Engineering Department. Most the research are done by Dr. Xin, Dr. Hansong and Dr. Tao, in Bio- imaging and machine vision lab, Biological Resources Engineering Department. Most materials and data are from their work. Most materials and data are from their work.

Biosensors Utilizing the absorption and reflection characters of bio-materials to get internal information from them. Utilizing the absorption and reflection characters of bio-materials to get internal information from them. X-ray: Absorption X-ray: Absorption Laser: Reflection Laser: Reflection

Background USDA, billion pounds of poultry annually poultry annually

Ⅰ X-ray technology and food inspection

Overview of X-ray imaging u: Materials d: Thickness

Typical applications of X-ray imaging Medical Diagnosis Medical Diagnosis Homeland Security Homeland Security Material Research Material Research Industrial Inspections Industrial Inspections

Challenge of bone detection The thickness is uneven The thickness is uneven The bone fragments are very tiny The bone fragments are very tiny

Current solutions Submerging the chicken meat in water Submerging the chicken meat in water ? cross contamination ? cross contamination Press the meat mechanically Press the meat mechanically ? shape damaged ? shape damaged Dual energy X-ray Dual energy X-ray ? physics limitation ? physics limitation

Questions How can we address the thickness variation problem directly? How can we address the thickness variation problem directly? How can we extract the thickness information from the uneven chicken meat? How can we extract the thickness information from the uneven chicken meat?

Ⅱ Laser 3D imaging

Approaches Time-Of-Flight (TOF) based technique Time-Of-Flight (TOF) based technique Structured light based technique Structured light based technique

Structured light based technique

The laser 3D imaging subsystem

Ⅲ Combined X-ray and Laser Imaging System

Overview of the combined system 0.6m/sec

Laser 3D Image to X-ray Image Mapping X-ray image: X-ray image: 3D Laser image: 3D Laser image:

Transformation X-ray image: X-ray image: 3D Laser image: 3D Laser image:

Thickness compensation

Results

Results

Results

Results

Results

Thank you!