pngtopam

Convert a PNG image to a Netpbm image.

Convert the specified PNG image to a Netpbm image

$ pngtopam [path/to/image.png] > [path/to/output.pam]

Create an output image that includes both the main image and transparency mask of the input image

$ pngtopam -alphapam [path/to/image.png] > [path/to/output.pam]

Replace transparent pixels by the specified color

$ pngtopam -mix -background [color] [path/to/image.png] > [path/to/output.pam]

Write tEXt chunks found in the input image to the specified text file

$ pngtopam -text [path/to/file.txt] [path/to/image.png] > [path/to/output.pam]