View Single Post
  #4  
Old April 18th 08, 10:57 PM posted to comp.graphics.algorithms,sci.image.processing,sci.astro.ccd-imaging
SpreadTooThin
external usenet poster
 
Posts: 6
Default Some Questions about Hough Transforms...

On Apr 18, 5:12*am, JS wrote:
Is this three vertical lines or is it one line?


That will depend on the resolution of your accumulator.

And this is really the problem I'm facing.. How do I determine the
size of the accumulator?
I can find the maximum peak easily, but what about other peaks in the
image...
How can I go about finding those?

I'm wondering if I should find a peak and then use the neighbors as a
weighted sum to get
the actual R Theta... Make sence?



Determining the length of your line: if the input to the hough
transform is a binary image, then the length of any possible line
could be considered to be the value in the corresponding accumulator
bin. *However, I would not recommend using this as the length. *I
think that the HT is good for getting general positions of lines, but
if you want length/position of lines you need to then use other
methods as well.