bmptopnm

Convert a BMP image to PNM format

$ bmptopnm [image.bmp] > [output.pnm]

$ cat [image.bmp] | bmptopnm > [output.pnm]

$ bmptopnm [image.bmp] | pnmtopng > [output.png]

bmptopnm [-verbose] [bmpfile]

bmptopnm reads a Microsoft Windows or OS/2 BMP file as input and produces a PNM (Portable aNyMap) image as output. The output format (PBM, PGM, or PPM) depends on the input: grayscale images produce PGM, color images produce PPM, and monochrome images produce PBM.
This is part of the Netpbm package of image manipulation utilities. Input can be from a file or standard input; output is to standard output.

-verbose

Print additional information about the input file.

Some BMP variants may not be fully supported. For compressed BMP files, decompression is handled automatically for RLE-encoded images. Very old or non-standard BMP formats may cause errors.

pnmtobmp(1), bmptoppm(1), pnmtopng(1), netpbm(1)