PNGINFO(1)						      General Commands Manual							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 <mikal@stillhq.com>.

       This manual page was written by Nelson A. de Oliveira <naoliv@debian.org>, for the Debian project (but may be used by others).

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