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verilog/vhdl code for edge detection using sobel operator

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harieandc

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sir this is my project pls help me for writing code .and give some suggestion...
 

A Sobel operation is a matrix convolution
 

Sounds pretty straightforward. I wonder how far the OP has got.
 

Convolution van be set up to do all sorts of filters.

Consider the following 1x3 matrix: (-1 0 1). If you convolve this along a line (a video perhaps) you would have a basic edge detector, because solid blocks of intensity would cancel itself out, but when you hit a luma change, the output would have a magnitude greater or lower than 1 (giving you the gradient).
 

xtcx said:
I wonder then what does a sobel operator has to do with edge detection :)
Sounds irrelevant, doesn't it?...
Click to expand...
If you mean clock edge detection, then you're indeed correct. It has nothing to do with it. But when it comes to video edge detection, then it's a technique that is regularly used...
Just do a google search on Sobel and edge detection, you'll find some interesting stuff.
 
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TrickyDicky said:
Convolution van be set up to do all sorts of filters.

Consider the following 1x3 matrix: (-1 0 1). If you convolve this along a line (a video perhaps) you would have a basic edge detector, because solid blocks of intensity would cancel itself out, but when you hit a luma change, the output would have a magnitude greater or lower than 1 (giving you the gradient).
Click to expand...

Yeah thanks for the piece of info buddy. I thought quite a different when I heard the name edge detection :) (I thought purely in terms of signals only, not to an image\video frame)

I got it....
 

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