M Sobel

Initial Software

Currently I have the software hosted at the following link on github: https://github.com/mjpatter88/SobelEdgeDetection

The code can be found here: https://github.com/mjpatter88/SobelEdgeDetection/blob/master/sobel.c

The makefile can be found here: https://github.com/mjpatter88/SobelEdgeDetection/blob/master/Makefile

This software supports both ppm (color) and pgm (black and white) images. In the case when the input image is a color image, each pixel is converted to gray scale before the Sobel operator is applied.

This algorithm also dynamically scales the output, so the highest value after the Sobel Operator has been applied becomes 255 (maxval), and the rest are scaled appropriately. From what I've observed, this tends to make the output images a little darker than other implementations, but they also are smoother. My implementation seems fairly similar to GIMP's use of the Sobel operator, as can be seen in the following screenshots.

inset initial image here File:Initial.jpg

gimp output

my program output.

results (test on my laptop and convey)

Software Optimization

link to code, makefile, results (test on my laptop and convey)

Software Simulation

link to code (c code, assembly, software sim c++), results.

Hardware

link to code, results, timing analysis