1. 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

2. 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.

3. 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

4. Background USDA,2000 32.5 billion pounds of poultry annually poultry annually

5. Ⅰ X-ray technology and food inspection

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

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

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

9. 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

10. 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?

11. Ⅱ Laser 3D imaging

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

13. Structured light based technique

14. The laser 3D imaging subsystem

15. Ⅲ Combined X-ray and Laser Imaging System

16. Overview of the combined system 0.6m/sec

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

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

21. Thickness compensation

22. Results

23. Results

24. Results

25. Results

26. Results

27. Thank you!