Hello. So i have this task where i have to analyse PNG picture. I have to find every white pixel (get distance from last white pixel). I know i should understand structure of png first. I googled it and i found about chunks, but i couldn't find any info about how pixels are written to file. Hope you can help me.
P.S Heres example picture i have to analyse: http://imageshack.us/photo/my-images/233/pnggc.png/