1. Perceptify Vocabularies Xiaofen Zheng Faculty of Computer Science Dalhousie University

2. Human Vision Gestalt Laws

3. GET Models Generic Segments The eight categories of generic segments. GS Description Curve Partition Points CPP Description The eight categories of curve partition points.

4. Experimental Results Edge trace and CPPs illustration The original image

5. Experimental Results (Cont ’ d) Edge trace and CPPs illustration The original image

6. Classification Experimental Result The eight categories of generic segments. The original image

7. Perceptual Junctions Low-level PJs High-level PJs LPJs descriptionsHPJs descriptions

8. Experimental Result The original image Perceptual junction detection and classification results HPJ Y : HPJ A : HPJ T : HPJ C : LPJ:

9. Grouping The definition of ellipse Ellipse Ellipse Grouping An ellipse model Parallelogram Grouping The definition of parallelogram Parallelogram A parallelogram model

10. Experimental Results The original image The edge segments and CPPs Ellipses grouping (confidence >= 75%) Confidence

11. Experimental Results (Cont ’ d) The original image The edge segments and CPPs Parallelograms grouping (confidence >= 75%)