Some output images (for comparison only)
sobeloutx.pgm

sobelouty.pgm

sobelmag.pgm

sobelout1.pgm

sobelout2.pgm

cannypeaks.pgm

cannyfinal.pgm

cannymag.pgm

marrhconv.pgm

marrhfinal.pgm

burnsout1.pgm

burnsout2.pgm

burnsout3.pgm

burnsout4.pgm

burnsout5.pgm

burnsout6.pgm

burnsout7.pgm

burnsout8.pgm

colorout1.pgm

colorout2.pgm

colorout3.pgm

colorout4.pgm

colorout5.pgm

linorout1.pgm

linorout2.ppm

linorskin3.pgm

siftmatch1.pgm