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Summer of Code - Getting Started: Difference between revisions
→Image Analysis: new project to improve Octave's image IO
Carandraug (talk | contribs) (→Octave Package management: rename, add a lot more details, and offer to mentor it) |
Carandraug (talk | contribs) (→Image Analysis: new project to improve Octave's image IO) |
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'''Difficulty''': difficult | '''Difficulty''': difficult | ||
'''Potential mentor''': Carnë Draug | |||
== Improve Octave's image IO === | |||
There are a lot of image formats. To handle this, Octave uses [http://www.graphicsmagick.org/ GraphicsMagic] (GM), a library capable of handling [http://www.graphicsmagick.org/formats.html a lot of them] in a single C++ interface. However, GraphicsMagick still has its limitations. The most important are: | |||
* GM has build option {{codeline|quantum}} which defines the bitdepth to use when reading an image. Building GM with high quantum means that images of smaller bitdepth will take a lot more memory when reading, but building it too low will make it impossible to read images of higher bitdepth. It also means that the image needs to always be rescaled to the correct range. | |||
* GM supports unsigned integers only thus incorrectly reading files such as TIFF with floating point data | |||
* GM hides away details of the image such as whether the image file is indexed. This makes it hard to access the real data stored on file. | |||
This project would implement better image IO for scientific file formats while leaving GM handle the others. Since TIFF is the de facto standard for scientific images, this should be done first. Among the targets for the project are: | |||
* implement the Tiff class which is a wrap around libtiff, using classdef. To avoid creating too many private __oct functions, this project could also create a C++ interface to declare new Octave classdef functions. | |||
* improve imread, imwrite, and imfinfo for tiff files using the newly created Tiff class | |||
* port the bioformats into Octave and prepare a package for it | |||
* investigate other image IO libraries | |||
* clean up and finish the dicom package to include into Octave core | |||
* prepare a matlab compatible implementation of the FITS package for inclusion in Octave core | |||
'''Required skills''': knowledge of C++ and C since most libraries are written in those languages | |||
'''Difficulty''': medium | |||
'''Potential mentor''': Carnë Draug | '''Potential mentor''': Carnë Draug | ||