The GIMP is designed to provide an intuitive graphical interface to a
variety of image editing operations. Here is a list of the GIMP's
major features:
Image editing
-------------
* Selection tools including rectangle, ellipse, free, fuzzy, bezier
and intelligent.
* Transformation tools including rotate, scale, shear and flip.
* Painting tools including bucket, brush, airbrush, clone, convolve,
blend and text.
* Effects filters (such as blur, edge detect).
* Channel & color operations (such as add, composite, decompose).
* Plug-ins which allow for the easy addition of new file formats and
new effect filters.
* Multiple undo/redo.
libdmtx - software for reading and writing Data Matrix barcodes
libdmtx is open source software for reading and writing Data Matrix
barcodes on Linux, Unix, OS X, Windows, and certain mobile devices. At
its core libdmtx is a shared library, allowing C/C++ programs to use its
capabilities without restrictions or overhead.
Data Matrix barcodes are two-dimensional symbols that hold a dense
pattern of data with built-in error correction. The Data Matrix
symbology (sometimes casually referred to as "DataMatrix") was invented
and released into the public domain by RVSI Acuity CiMatrix.
LibRaw is a library for reading RAW files obtained from digital photo
cameras (CRW/CR2, NEF, RAF, DNG, and others).
LibRaw is based on the source codes of the dcraw utility, where part of
drawbacks have already been eliminated and part will be fixed in future.
The users of the library are provided with API to be built into their
software programs.
LibRaw is intended to be used in any software that involves RAW file
processing for a variety of purposes: RAW converters, data analyzers,
panorama stitchers, noise suppressors, etc.
VIPS's a free image processing system. It aims to be about half way between
Excel and Photoshop. It's obviously much smaller than these two, but it's
not a toy either (about 200k lines of code). It's very bad at photo
retouching, but it's great (much better than programs like Photoshop, I
think) at all the other things you use photoshop for. It's particularly
good with large images (ie. images larger than the amount of RAM in your
machine), and for working with colour.
Xournal is an application for notetaking, sketching, keeping a journal using a
stylus. It is similar to Microsoft Windows Journal or to other alternatives such
as Jarnal, Gournal, and NoteLab.
Xournal aims to provide superior graphical quality (subpixel resolution) and
overall functionality; however it lacks the collaborative features of Jarnal.
Since Xournal is still in its early development stages, it may not be fully
stable, and some features have not been implemented yet.
Xournal supports annotation of PDF files through the Poppler library; PDF files,
much like paper styles, are loaded as an immutable background image.
Luminance HDR is an open source graphical user interface application that
aims to provide a complete workflow for HDR image processing.
Supported features:
* Create an HDR file from a set of images (formats: JPEG, TIFF 8-bit and
16-bit, RAW) of the same scene taken at different exposure settings
* Rotate, resize, and crop HDR images
* Tonemap HDR images
* Copy EXIF data between sets of images
Supported HDR formats (with file extensions):
* OpenEXR (.exr)
* Radiance RGBE (.hdr)
* TIFF formats: 16-bit, 32-bit (float) and LogLuv (.tiff)
* PFS native format (.pfs)
* Raw image formats (various)
Supported LDR formats: JPEG, PNG, PPM, PBM, TIFF (8-bit).
Luminance HDR is an open source graphical user interface application that
aims to provide a complete workflow for HDR image processing.
Supported features:
* Create an HDR file from a set of images (formats: JPEG, TIFF 8-bit and
16-bit, RAW) of the same scene taken at different exposure settings
* Rotate, resize, and crop HDR images
* Tonemap HDR images
* Copy EXIF data between sets of images
Supported HDR formats (with file extensions):
* OpenEXR (.exr)
* Radiance RGBE (.hdr)
* TIFF formats: 16-bit, 32-bit (float) and LogLuv (.tiff)
* PFS native format (.pfs)
* Raw image formats (various)
Supported LDR formats: JPEG, PNG, PPM, PBM, TIFF (8-bit).
Libpng was written as a companion to the PNG specification, as a
way to reduce the amount of time and effort it takes to support
the PNG file format in application programs. Most users will not
have to modify the library significantly; advanced users may want
to modify it more. The library was coded for both users. All
attempts were made to make it as complete as possible, while
keeping the code easy to understand. Currently, this library
only supports C. Support for other languages is being considered.
LICENSE: libpng license
http://libpng.sourceforge.net/
LablGL is an OpenGL interface for Objective Caml. Since it includes
support for the Togl widget, you can comfortably use it with LablTk.
All of the GL and GLU libraries are available. Read a good book
about how to use these. Translating from OpenGL to LablGL is rather
straightforward: there is a LablGL function for each OpenGL one. For
ease of retrieving, both GL and GLU are cut in smaller modules of
related functions.
Please see ${PREFIX}/share/doc/ocaml/lablgl/README for further information.
gd is a graphics library. It allows your code to quickly draw images
complete with lines, arcs, text, multiple colors, cut and paste from
other images, and flood fills, and write out the result as a PNG, GIF
or JPEG file. This is particularly useful in World Wide Web applications,
where PNG, GIF and JPEG are three of the formats accepted for inline
images by most browsers.
gd does not provide for every possible desirable graphics operation,
but version 2.0 does include most frequently requested features,
including both truecolor and palette images, resampling (smooth
resizing of truecolor images) and so forth.