About Sobel operator in Image Processing

[Sweety08]

How to apply the sobel operator to each image and display the edge images

[David Crow]

Sweety08 wrote:

How to apply the sobel operator to each image...

Just like you would any other filter. Do you have the filter's source code or library?

Sweety08 wrote:

...and display the edge images

Are the images on disk or in memory? Are you able to display them as is (i.e., no filter applied)?

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[Chris Losinger]

for every pixel, calculate: Gx = -1 * p(x-1,y-1) + 1 * p(x+1,y-1) + -2 * p(x-1,y) + 2 * p(x+1,y) + -1 * p(x-1,y+1) + 1 * p(x+1,y+1) Gy = p(x-1,y-1) + 2 * p(x,y-1) + p(x+1,y-1) - p(x-1,y+1) - 2 * p(x,y+1) - p(x+1,y+1) + pOut(x,y) = sqrt(Gx * Gx + Gy * Gy) (this is from Wiki)

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