Projects in GSoC 2009

Better nonlinear resampler with built-in antialiasing (GEGL)

Mentor : Nicolas Robidoux

Student : Adam Turcotte

Port improvements to Nohalo Level 1 and port Snohalo Level 1 from VIPS to GEGL. Program Nohalo and Snohalo Levels 2 and 3 in demand-driven mode for GEGL with Dr. Robidoux. Test for bugs and optimize for speed. Merge the various methods so that levels are automatically chosen depending on requested quality level, and so Nohalo is selected instead of Snohalo when additional antialiasing is set to zero. Sample output images can be seen at http://gsoc.rivetsforbreakfast.com/enlargements.html.

OpenGL GPU-based Buffer & Operations in GEGL

Mentor : Martin Nordholts

Student : Jerson Michael Perpetua

GEGL (Generic Graphics Library) is a new back-end to replace GIMP's old code for handling various image processing tasks.

GPUs nowadays are capable of massively accelerating graphics tasks, there is an ongoing movement to harness this power in general computing. However, because of the nature of GPU parallelization, not all code can be executed in the GPU. GEGL's architecture of pixel operations yields itself to GPU parallelization, making it a good candidate for GPU acceleration.

Fast Adaptive Resampler Tailored For Transformations Which Mostly Downsample (GEGL)

Mentor : Nicolas Robidoux

Student : Eric Daoust

I am proposing to implement better and faster downsampling and resampling in GEGL

Improve Foreground Selection Tool

Mentor : Gerald Friedland

Student : Jie Ding

SIOX is the algorithm underlying GIMP's foreground selection. In current version, a pixel is either foreground or background. A Detail Refinement Brush will be offered to the user as a simple interactive drawing tool, with which the foreground selection could implement a soft segmentation. It would improve the performance of the tool for areas where background and foregound overlap, such as in fine-grained, highly-textured, or semi-transparent objects like hair, clouds, or iced objects.

Proposal - Advanced GUI for brush dynamics (GIMP)

Mentor : Kaja Liiv

Student : Zhenfeng Zhao

This proposal presents the plan and goals to the project “Advanced GUI for brush dynamics”, and how my experience fits. With my graduate studies in image processing, and being Lead Developer of a local company (3-patent image manipulation R&D) I had outstanding skills and experiences. I am proficient in C, understand the tasks, and enjoy working virtually.