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pngchunks(1) [debian man page]

PNGCHUNKS(1)						      General Commands Manual						      PNGCHUNKS(1)

NAME
pngchunks - print information embedded into a PNG file SYNOPSIS
pngchunks file DESCRIPTION
pngchunks is a program that displays informations from files created according to the Portable Network Graphics file format. EXAMPLE
pngchunks input.png Chunk: Data Length 13 (max 2147483647), Type 1380206665 [IHDR] Critical, public, PNG 1.2 compliant, unsafe to copy IHDR Width: 256 IHDR Height: 256 IHDR Bitdepth: 8 IHDR Colortype: 2 IHDR Compression: 0 IHDR Filter: 0 IHDR Interlace: 0 IHDR Compression algorithm is Deflate IHDR Filter method is type zero (None, Sub, Up, Average, Paeth) IHDR Interlacing is disabled Chunk CRC: -753909967 Chunk: Data Length 6 (max 2147483647), Type 1145523042 [bKGD] Ancillary, public, PNG 1.2 compliant, unsafe to copy ... Unknown chunk type Chunk CRC: 554438993 Chunk: Data Length 9 (max 2147483647), Type 1935231088 [pHYs] Ancillary, public, PNG 1.2 compliant, safe to copy ... Unknown chunk type Chunk CRC: -757235972 Chunk: Data Length 7 (max 2147483647), Type 1162692980 [tIME] Ancillary, public, PNG 1.2 compliant, unsafe to copy ... Unknown chunk type Chunk CRC: 429243611 Chunk: Data Length 831 (max 2147483647), Type 1413563465 [IDAT] Critical, public, PNG 1.2 compliant, unsafe to copy IDAT contains image data Chunk CRC: 1406256926 Chunk: Data Length 0 (max 2147483647), Type 1145980233 [IEND] Critical, public, PNG 1.2 compliant, unsafe to copy IEND contains no data Chunk CRC: -1371381630 SEE ALSO
pngchunkdesc(1), pngcp(1), pnginfo(1). AUTHOR
pngchunks 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 PNGCHUNKS(1)

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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)
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