Hough transform algorithm problem

Hi,

I am trying to write a program that searches for lines in a Bitmap picture.

 for i := 1 to bmp.Width-2 do
    for j:= 1 to bmp.Height-2 do
      begin
//// this thing is for transforming the picture to black-white//////
        r := ColorToRGB(bmp.Canvas.Pixels[i, j]) mod $100;
        g := ColorToRGB(bmp.Canvas.Pixels[i, j]) mod $10000 div $100;
        b := ColorToRGB(bmp.Canvas.Pixels[i,j - 1]) div $10000;
        x := (3*r+6*g+b) div 10;
        bmp.Canvas.Pixels[i,j] := x + x*$100 + x*$10000;
      end;
    Image1.Picture.Bitmap := bmp;

what I need is to do something in this style, but function should use Hough algorithm to find lines.
I can't find anything useful on the net :-(

help me please... someone... at least exact algorithm would be a good start...
LVL 1
PovilasAsked:
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HypoviaxCommented:
Have a look at this component from Torry's Delphi page at:

http://www.torry.net/graphicspacks.htm

or just download it:

http://www.torry.net/vcl/graphics/packs/pixelook.zip

Features Hough analysis which may be usefule to you.

Regards,

Hypoviax
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PovilasAuthor Commented:
well, thats only a start, cause this is component pack, as far it looks like it does not have Hough transform part, it is not freeware, and finally source code is not simple to be able to cut it out from the pack..
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