Write an image copy, resize, rename software

I have .png black and white pictures. I would like to use a program what can modify the width of the image. The program have to track all pixels, and if in one coloumn there are 1-2-3-4-5 black area, the program have to modify the width of the coloumn. black area above each other--> ratio 1; 0,5 2;1 3;1,5 4;2 5;2,5 ... I will use it for a folded book art creator in php language. . [login to view URL] With it I can prepare better book sculptures. EG: in the appendix file the first few coloumn there is only one black area, but later there are two and three areas. output a new file with a new name: [original name]+[login to view URL]