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‰PNG␍␊␚␊ 0 png Image encoded in the Portable Network Graphics format [26] 0E 03 13 01 ␅␃␓␁ 0 hdf4 h4 Data stored in version 4 of the Hierarchical Data Format. 89 48 44 46 0D 0A 1A 0A ‰HDF␍␊␚␊ 0, 512, 1024, 2048, ... hdf5 h5 Data stored in version 5 of the Hierarchical Data Format. C9: É: 0 com CP/M 3 and higher with ...
ExifTool is a free and open-source software program for reading, writing, and manipulating image, audio, video, and PDF metadata.As such, ExifTool classes as a tag editor.It is platform independent, available as both a Perl library (Image::ExifTool) and a command-line application.
PNG files vary in size due to a number of factors: color depth Color depth can range from 1 to 64 bits per pixel. ancillary chunks PNG supports metadata—this may be useful for editing, but unnecessary for viewing, as on websites. interlacing As each pass of the Adam7 algorithm is separately filtered, this can increase file size. [54] filter
Metadata Working Group was formed by a consortium of companies in 2006 (according to their web page) or 2007 (as stated in their own press release). Version 2.0 of the specification was released in November 2010, [8] giving recommendations concerning the use of Exif, IPTC and XMP metadata in images.
XMP metadata can describe a document as a whole (the "main" metadata), but can also describe parts of a document, such as pages or included images. This architecture makes it possible to retain authorship and rights information about, for example, images included in a published document.
The PNG (Portable Network Graphics) file format was created as a free, open-source alternative to GIF. The PNG file format supports 8-bit (256 colors) paletted images (with optional transparency for all palette colors) and 24-bit truecolor (16 million colors) or 48-bit truecolor with and without alpha channel – while GIF supports only 8-bit ...
XnView can show IPTC, Exif and XMP metadata, and write IPTC metadata (It can also do batch writing of IPTC metadata). [15] [16] It can write XMP metadata partly together with IPTC metadata. It also supports file comments (4DOS descript.ion). XnView can search files that have the same filename or data, and can search for similar graphics as well.
pngcrush is a free and open-source command-line utility for optimizing PNG image files. It reduces the size of the file losslessly – that is, the resulting "crushed" image will have the same quality as the source image.