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One of pngcrush's features is the ability to remove all the color-correction data (gamma, white balance, ICC color profile, standard RGB color profile) from PNG files. [5] Since most graphics software embed the extra color-correction data, which is normally not needed, [according to whom?] removing it can produce file sizes that are up to 40% ...
File renaming, single-click background copy/move to preset location, single-click rating/labeling (writes Adobe XMP sidecar files and/or embeds XMP metadata within JPEG/TIFF/HD Photo/JPEG XR), Windows rating, color management including custom target profile selection, Unicode support, Exif shooting data (shutter speed, f-stop, ISO speed ...
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.
PixelPeeper - can read Exif and XMP metadata from JPG files. Also, it can turn XMP metadata into Lightroom-compatible presets. Portfolio - DAM software, can read/write XMP in supported file formats (Microsoft Windows, Mac OS X) Stibo STEP - DAM component reads/writes XMP for all supported formats
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.
Exchangeable image file format (officially Exif, according to JEIDA/JEITA/CIPA specifications) [5] is a standard that specifies formats for images, sound, and ancillary tags used by digital cameras (including smartphones), scanners and other systems handling image and sound files recorded by digital cameras.
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. [56] filter
Windows Imaging Component provides an extensible architecture for image codecs, pixel formats, and metadata, with automatic run-time discovery of new formats. It supports reading and writing of arbitrary metadata in image files, with the ability to preserve unrecognized metadata during editing.