ImageMagick

ImageMagick is a robust collection of UNIX tools and libraries offered under a usage license to read, write, and manipulate an image in many image formats (over 89 major formats) including popular formats like TIFF, JPEG, PNG, PDF, PhotoCD, and GIF. With ImageMagick you can create images dynamically, making it suitable for Web applications. You can also resize, rotate, sharpen, color reduce, or add special effects to an image or image sequence and save your completed work in the same or differing image format. Image processing operations are available from the command line, or from the C, C++, Perl, Java, PHP, Python, or Ruby programming languages. A high-quality 2D renderer is included, which provides a subset of SVG capabilities. ImageMagick's focus is on performance, minimizing bugs, and providing stable APIs and ABIs.

Here are just a few examples of what ImageMagick can do:

• Convert an image from one format to another (e.g., TIFF to JPEG)
• Resize, rotate, sharpen, color reduce, or add special effects to an image
• Create a montage of image thumbnails
• Create a transparent image suitable for use on the Web
• Turn a group of images into a GIF animation sequence
• Create a composite image by combining several separate images
• Draw shapes or text on an image
• Decorate an image with a border or frame
• Describe the format and characteristics of an image

• Don't handle a "previous" image in the JNG decoder.
• Don't override gamma with 1.0 when reading a grayscale PNG image
• Fix double free / invalid read when converting jpg to pdb
• Maximum XWD image size is 64Kx64K
• Maximum DPX number of elements is 8
• Transient problem with SVG
• Check for zero-sized rendered SVG image
• EXIF directory offsets must be greater than 0
• Accept morphology kernels from files
• Don't optimize JPEG compression by default
• Added support for reading jpeg compressed YCCK tiff files
• Fixed reading DICOM files with big endian transfer syntax
• Added sixel coder created by Hayaki Saito (@kefir_).
• Fixed buffer overflow in PCX and DCM coder (bug report from Hanno Bˆck).
• Added support for reading/writing the tIME chunk in the PNG coder.
• Added eps:fit-page option to the PS coder to set -dEPSFitPage.
• Support xyY colorspace
• Reduce noise while preserving edges with the -kuwahara option.
• Off-by-one count when parsing an 8BIM profile.
• Locale.c won't build if uselocale found but strtod_l isn't
• OpenCL no longer benchmarks are run on every initialization
• Don't clone a 0x0 image
• JPEG library version >= 80 is thread safe
• Added support for some legacy dds formats
• Fix off by one buglet when extracting profiles 8BIM
• Fixed bug when reading 1 bit PSD.
• Relocate initialization of "image_colors" in the PNG encoder, to avoid a possible use of uninitialized variable.
• Use IsOptionMember() instead of LocaleNCompare() in coders/png.c to parse the list of excluded and included PNG chunks.
• Fixed fill-rule in SVG clip path
• Removed some dead code (testing image->matte) in PNG64 encoder.
• Added support for R5G6B5, RGB5A1 and RGBA4 dds files.
• Write LAB pixels as percentages in the TXT image format
• Throw exception when image morphology differs when comparing
• Remove mogrify backup file
• Read WEBP images from STDIN