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Showing content from https://github.com/SixLabors/ImageSharp/wiki/Useful-tools-and-links below:

Useful tools and links · SixLabors/ImageSharp Wiki · GitHub

This is a collection of useful tools and links to help contributors getting started.

• imagemagick command line tool for converting between image formats or compressing images with different compressions. Useful for creating test images for unit tests.
• https://sharplab.io is a .NET code playground that shows intermediate steps and results of code compilation. Useful for seeing what IL code will be generated.

LibPng is considered the reference implementation.

Some useful links for documentation of the PNG format

• PNG spec Overview
• PNG spec
• Extensions to the PNG 1.2 Specification, Version 1.5.0
• Png Tags

Useful testimages for reference:

• Google PNGTestSuite.wiki
• pngsuite

Useful tools:

• gifiddle is a GIF viewer based on JavaScript and HTML5 that runs entirely in a browser, for detailed information and various rendering modes for analysis and optimization.

Some useful links for documentation of the GIF format

• Gif Specification
• Gif Animations Basis
• What is a Gif
• Netscape Looping Application Extension (GIF Unofficial Specification)

A useful set of gif test images

• pygif

libwebp is considered the reference implementation. It comes with some useful tools:

• webpinfo: Shows if a webp image is encoded correctly.
• dwebp: decodes a webp image.
• cwebp: encoed a image to webp format.

Some useful links for documentation of the webp format

• webp introduction
• Lossy webp specification
• Lossless webp specification

webp test data:

• libwebp-test-data

libjpeg is considered to be the reference implementation.

• Overview JPEG Specification
• Jpeg spec, Part 1
• Metadata in JPEG 1
• Metadata structure JPEG 2

LibTiff is considered the reference implementation.

• tiffinfo: Allow to check, if a tiff file was encoded correctly.
• tiffcp: Copy, convert, or combine TIFF files.
• tiffcmp: Compare the tags and data in two TIFF files.
• tiffdump: Display directory information from TIFF files.

• TIFF 6.0 Specification
• TIFF Supplement 1
• TIFF Supplement 2
• TIFF Jpeg Notes
• TIFF-F/FX Extension (RFC2301)
• TIFF/EP Extension (Wikipedia)
• Adobe TIFF Pages
• Unofficial TIFF FAQ
• CCITT T.4 Compression
• CCITT T.6 Compression

Some useful links for documentation about the TGA format

• Fileformat.info
• Tga Specification

• Microsoft Windows Bitmap File
• OS/2 Bitmap File Format Summary
• Dr.Dobbs: The BMP File Format, Part 1
• Windows Bitmap File Format Specifications

• bmpsuite
• eclecticgeek

• Exif Overview
• EXIF 2.3 Specification
• Adobe XMP Pages
• Adobe XMP Developer Center
• IPTC Introduction
• Metadata structure JPEG

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