Package pngcheck-extras

http://www.libpng.org/pub/png/apps/pngcheck.html

Included with pngcheck (since version 2.1.0) are two helper utilities:

  - pngsplit - break a PNG, MNG or JNG image into constituent chunks (numbered
    for easy reassembly)
  - png-fix-IDAT-windowsize - fix minor zlib-header breakage caused by libpng
    1.2.6

Version: 3.0.3

See also: pngcheck.