Edge Detection and Emboss

bubber

• Explain the loops,
• The methods for calculating the pixel values ​​of the two filters.

[Skærmbillede 2014-06-23 kl. 16.57.26] ( "Skærmbillede 2014-06-23 kl. 16.57.26")

bubber

[Skærmbillede 2014-06-23 kl. 16.57.11]( "Skærmbillede 2014-06-23 kl. 16.57.11")

koogs

http://en.wikipedia.org/wiki/Kernel_(image_processing)

koogs

http://forum.processing.org/two/discussion/5910/edge-detection

and again, please paste code, not screenshots of code.

bubber

so the method is the convolution matrix?

koogs

kernel is the actual matrix. you'll notice that the actual code for the two is IDENTICAL, it's the kernel that makes the difference.

the outer two loops loop over each pixel of the image

the inner two loops loop over the matrix applying it to the current position.

the loop contents are just the calculation (a sum of the weighted pixels) and setting of the result pixel

exactly as it says here: http://en.wikipedia.org/wiki/Kernel_(image_processing)#Convolution