NAME

       pnginfo - display information on the PNG files named

SYNOPSIS

        pnginfo [-t] [-d] [-D] <filenames>

DESCRIPTION

       This  command  dumps  information about the PNG files named on the command line. This command's output is
       based on the output of the tiffinfo command, which is part of the libtiff distribution. Each line  output
       by the command represents a value that has been set within the PNG file.

       The  -t  command  line  option  forces  pnginfo to use libtiff tiffinfo style labels, instead of the more
       relevant png names. The -d command line option dumps the bitmap contained by the image to  standard  out,
       whilst the -D command merely checks that the image bitmap could be extracted from the file. If nothing is
       reported by -D, then there was no error.

       The  format  for the output bitmaps is hexadecimal, with each pixel presented as a triple -- for instance
       [red green blue]. This means that paletted images et cetera  will  have  their  bitmaps  expanded  before
       display.

RETURNS

       0 success

       1 error

EXAMPLE

       pnginfo -t toucan.png basn3p02.png basn6a16.png toucan.png...
        Image Width: 162 Image Length: 150
        Bits/Sample: 8
        Samples/Pixel: 1
        Pixel Depth: 8
        Colour Type (Photometric Interpretation): PALETTED COLOUR with alpha (256 colours, 256 transparent)
        Image filter: Single row per byte filter
        Interlacing: Adam7 interlacing
        Compression Scheme: Deflate method 8, 32k window
        Resolution: 0, 0 (unit unknown)
        FillOrder: msb-to-lsb
        Byte Order: Network (Big Endian)
        Number of text strings: 0 of 0

       basn3p02.png...
        Image Width: 32 Image Length: 32
        Bits/Sample: 2
        Samples/Pixel: 1
        Pixel Depth: 2
        Colour Type (Photometric Interpretation): PALETTED COLOUR (4 colours, 0 transparent)
        Image filter: Single row per byte filter
        Interlacing: No interlacing
        Compression Scheme: Deflate method 8, 32k window
        Resolution: 0, 0 (unit unknown)
        FillOrder: msb-to-lsb
        Byte Order: Network (Big Endian)
        Number of text strings: 0 of 0

       basn6a16.png...
        Image Width: 32 Image Length: 32
        Bits/Sample: 16
        Samples/Pixel: 4
        Pixel Depth: 64
        Colour Type (Photometric Interpretation): RGB with alpha channel
        Image filter: Single row per byte filter
        Interlacing: No interlacing
        Compression Scheme: Deflate method 8, 32k window
        Resolution: 0, 0 (unit unknown)
        FillOrder: msb-to-lsb
        Byte Order: Network (Big Endian)
        Number of text strings: 0 of 0

SEE ALSO

       tiffinfo(1) pngchunkdesc(1) pngcp(1)

VERSION

       This documentation was generated for pngtools 0.2 by autodocbook (http://www.stillhq.com).

AUTHOR

       pngtools  is  under development by Michael Still (mikal@stillhq.com). All code is Copyright Michael Still
       2001 to 2003,  and is released under the GNU GPL. Code submissions are welcomed. Contact Michael  at  the
       address above if you have something you would like to contribute.

BUGS

       There  are no known bugs in pngtools. If you find one, please contact mikal@stillhq.com and let me know.

                                                  22 April 2025                                       PNGINFO(1)