Image Processing For Robot Navigation. Modar Ibraheem Wintersemester 2007/2008. Content. Definitions & Concepts Edge Detection Hough Transform Example. Definitions & Concepts Image.
Image Processing For Robot Navigation
Many edge extraction techniques can be broken up into two distinct phases:
surface normal discontinuity
surface color discontinuity
The Hough Transform can detect lines or curves that are very broken (after initial edge detection, for example).
HTs can only detect lines or curves that analytically specifiable, or that can be represented in a template-like form (GHT, Ballard).
for = 0 to 180
H[d, ] += 1
1. The moderate peaks represent the floor.
2. Homogeneously colored object
3. Moderate intensity distribution but the pixels are apt to belong to the tips of gray level.
Do you see yonder cloud that’s almost in the shape of a camel?
By th’mass, and ’tis like a camel indeed.
Methinks it is like a weasel.
It is backed like a weasel.
Or like a whale?
Very like a whale.