pnginfo(1)

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
   lables,  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

   Nothing.

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

   pngchunkdesc(1), pngchunks(1), pngcp(1),

AUTHOR

   pnginfo was written by Michael Still <[email protected]>.

   This   manual   page   was   written   by   Nelson   A.   de   Oliveira
   <[email protected]>, for  the  Debian  project  (but  may  be  used  by
   others).

                    Tue, 31 Jul 2007 17:55:51 -0300             PNGINFO(1)

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