2A-L5 Edge detection: Gradients
CS4495/6495
Introduction to Computer Vision
Reduced images
Reduced images
Edges seem to be important…
Origin of Edges
depth discontinuity
surface color discontinuity
illumination discontinuity
surface normal discontinuity
In a real image
Depth
discontinuity:
object boundary
Discontinuous
change in surface
orientation
Cast shadows
Reflectance change:
appearance
information, texture
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![[arxiv.org]](http://s1.studylibfr.com/store/data/009794801_1-6e0c12c08d17e92518f7b5d8d06ebb87-300x300.png)
![[arxiv.org]](http://s1.studylibfr.com/store/data/009794603_1-6aa0f8bef5cc56af9bf73e355200507e-300x300.png)
![[arxiv.org]](http://s1.studylibfr.com/store/data/009717759_1-d8039c1d14d960520c1c971bf9b24f01-300x300.png)
