Hacking:GSOC/Archive

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This page lists old/new ideas for GSoC for GIMP. It's based on the archived GIMP wiki GSoC page and on the former offical GSoC pages for GIMP.

In short, what is Google Summer of Code (GSoC)?

From the official site: "Google Summer of Code is a global program that offers student developers stipends to write code for various open source software projects." Practically, this means that each year google selects about 150 open-source projects, and pays students 5000$ (USD) for working on the project for 3 months, to implement a specific feature. Each student is assigned a mentor which will guide him through the process, but most of the work (if not all of it) will still be done by the student. Therefore, each open-source project decides on some requirements that students must fullfil in order to participate. Each year, the open-source applies for GSoC and when (and if) it's accepted then students may apply (students must fullfil the requirements of google and of the specific project). About 1000 students are accepted each year (since each open-source project may have several GSoC projects).

More information can be found at the GSoC site. Note that participation is only allowed for students who are older than 18. For details about applications see Hacking:GSOC‎.

Obviously, this page exists here since GIMP applies for GSoC almost every year =)

Contents


Projects in GSoC 2013

Implement GEGL ops that GIMP needs (OpenCL ports)

Mentor: Victor Oliviera (victorm)

Student: Carlos Zubieta (zurwolf)

Category: Plug-Ins/Scripts

Status: finished

Integration status: work in progress

The release of GIMP 2.10 is partially blocked by legacy plug-ins. Some of them have to be ported to GEGL operations, some can just work on GEGL buffers for now. For a list of plug-ins please refer to Hacking:Porting_filters_to_GEGL. Since 2011 with the participation of Victor Oliveira at the GSoC, the “new” Gimp core library, GEGL has support for OpenCL. A lot of work has been done to give full OpenCL support to GEGL, but there still much more to do. Some of the laking OpenCL support parts are the GEGL operations. I propose to port to OpenCL the existing GEGL operations list on the wiki at the processing, color grading and effects section of the Porting filters to OpenCL page [1].


Minimal Student Requirements:

  • Good C knowledge
  • basic GObject knowledge


See also


Implement the combined selection tool

Mentor: Michael Natterer (mitch)

Student: Ajay Ramanathan (Chinu)

Category: Tools, User Interface

Status: not finished

Integration status: not integrated

This projects aim is to implement a unified selection tool that combines the functionality of the rectangle/ellipse selection tool, fuzzy select, select by color, foreground selection tool, free selection tool and intelligent scissors into three new tools, and is easier and faster to use. The combined selection tool should be an all-in-one tool for selecting regions based on an interaction design research made by Voralberg students in 2010.


Minimal Student Requirements:

  • Good C knowledge
  • Basic Gtk+/GObject knowledge and/or at least some interest in User Interface programming


See also


Improve support for importing and exporting PSD files

Mentor: Michael Schumacher (schumaml)

Student: Simon Lui (Crystallis)

Status: finished

Integration status: work in progress, see call for testers and contributors

While existing PSD plug-in supports many essential features of the file format, fixing bugs and adding support for some missing features would make a rather useful GSoC project.

Note that until non-destructive editing is at least designed for GIMP, it isn't possible to implement support for layer styles or adjustment layers. The code, however, should be ready for that.

Additional work could involve (better) support for resources, such as:


Minimal Student Requirements:

  • Good C knowledge
  • Highly recommended — some knowledge of GIMP's internals (core)


See also


n-Point Image Deformation Tool

Mentor: Alexia Death (Alexia_Death)

Student: Marek Dvorožňák (korek)

Category: Tools

Status: finished

Integration status: work in progress

During image editing it's very useful to have a possibility to deform an image in a way so that it behaves like a real world object (or object made of a rubber). At present there are many image deformation methods allowing us to do that. Some of them are implemented as tools in various software - for example Puppet Warp in Photoshop. I propose to implement a method into GIMP which behaves similarly to these methods but is more intuitive (easier to use), more predictable and should be fast enough.

See also


Projects in GSoC 2012

Port missing GIMP features to GEGL

Mentor: Mukund Sivaraman

Student: Ville Sokk

Working on recreating legacy GIMP features that are missing from GEGL. The aim is to help replace the existing GIMP image processing core with GEGL to bring better precision, more colour formats and better programmer flexibility to GIMP while keeping all the familiar GIMP features working as they are.

See also the GSoC page.

Integration status: work in progress

Porting GEGL operations

Mentor: Victor Oliviera

Student: Hans Lo

I am applying for the GEGL operation porting project.

See also

Integration status: work in progress

Graphical Node Editor

Mentor: Alexia Death

Student: Isaac Wagner

It consists of two components. The first and largest component is the development of a fully-featured graphical node editor ("box and hose editor") which will sit on top of the GEGL public API and allow for fast sandboxing of GEGL operations for debugging, artistic, and showcase purposes. The editor will be similar to familiar editors such as Blenders shader editor and the MathMap1 editor. The second component of my proposal is to develop code for saving and loading meta-ops to and from XML (resolving bug 465743). This code will exist within the GEGL codebase and manifest itself as a component of the node editors interface.

See also

To build the project yourself, you also need Graph-gtk.

Unified Transformation Tool

Mentor: Michael Natterer

Student: Mikael Magnusson

Category: Tools, User Interface


Implement a unified transformation tool that combines the functionality of the rotate, shear, scale and perspective tools, and is easier and faster to use.

Initial implementation is available in Mikael Magnusson's Git branch.

Minimal Student Requirements:

  • Good C knowledge
  • Gtk+/GObject basic knowledge and/or at least some interest in User Interface programming


See also


Integration status: work in progress. To be integrated in GIMP 2.10.

Projects in GSoC 2011

Porting GIMP plugins to GEGL operations

Mentor: Mukund Sivaraman

Student: Robert Sasu

The main point is to port GIMP plug-ins to GEGL, because GEGL API supports higher pixel depth, has a smart job and memory management, allows non-destructive editing.

See also

Integration status: work in progress. To be integrated in GIMP 2.10.

OpenCL in GEGL

Mentor: João S. O. Bueno

Student: Victor Oliveira

The proposal is about making it possible to write GEGL operations in OpenCL. There are two tasks:

  1. Automatic memory management and migration of tiles from GPU to the CPU and the other way around.
  2. Make some GEGL operations in OpenCL.

See also

Integration status: work in progress. To be integrated in GIMP 2.10.

Adaptive Cloning (aka Seamless cloning)

Mentor: Michael Natterer

Student: Barak Itkin

Direct cloning of parts from one image to another, usually ends in bad results because of different lighting conditions and other settings (such as white-balance) which causes the color of the cloned part not to match the source image and look out of place. There are some techniques to solve this, by using poisson equations and some other methods. This suggestion allows a fast (realtime) solution for allowing to paste seamlessly parts from one image to another.

See also

Integration status: work in progress. To be integrated in GIMP 2.10.

Barak Itkin recently posted an update in his blog to outline the changes to be made.

Replace GimpSizeEntry widget

Mentor: Martin Nordholts

Student: Enrico Schröder

The GimpSizeEntry widget in its current form, which is used across the user interface for entering values and their corresponding units (e.g. image dimensions, lengths, etc.), has a couple of issues both from a users and a developers standpoint. The project is to rewrite the widget being based on GtkEntry with the ability to directly enter and display the desired unit in the text field itself instead of in an external control. Simple mathematical terms for the input of values in different units will be possible using the existing parser (gimpeevl).

See also

Integration status: work in progress. To be integrated in GIMP 2.10.

Warp tool for GIMP

Mentor: Alexia Death

Student: Michael Muré

The goal is to implement a live on-canvas iWarp like tool. Behavior: The basic usecase of this tool would be:

1. The user select the iwarp tool. Nothing is displayed on top of the image.

2. If needed, the user select a particular behavior for the tool (drag,shrink, grow, whirl, pinch ..)

3. The user do a stroke on the canvas. The image is updated accordingly.

See also

Integration status: Integrated in GIMP 2.10.

Projects in GSoC 2010

HDR and matting operators for GEGL

Mentor: Martin Nordholts

Student: Danny Robson

GEGL does not currently contain methods which assist in HDR workflows which have become quite popular. I propose to develop three native GEGL tone-mapping operations.

I also propose to target an image matting operator, allowing the straightforward decomposition of an image into foreground and background components. I will implement the `matting laplacian'.

Cage-based deformation tool

Mentor: Kaja Liiv

Student: Michael Mure

Green Coordinates is a method allowing deformation of an image, by deforming the inside of a polyhedral cage. The technique was exposed in Siggraph 2008. Unlike the other classical method (mean value coordinates, harmonic coordinates, ..), it allows high quality deformation by preserving the shape.

Basic behavior of the tool:

  • you "put" a closed polygon on the image (not limited to 4 handles)
  • you deform the cage, the image is deformed accordingly

Implement and add infrastructure for on-canvas tool drawing/options

Mentor: Joao Bueno

Student: Chen Yan

The project is to implement and add infrastructure for on-canvas tool drawing/options. Gimp has many dockable dialogs. If some commonly used and simple interactions, with values and settings, can be presented, tracked, and modified directly on the image canvas, it would be very useful. It would save clicks and users' time. Reducing the number of opened dockable dialogs is advantageous, especially for Windows users, for many simple editing, drawing and options.


Projects finished 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.

Projects finished in GSoC 2008

Improving the text-tool in GIMP

Mentor: Daniel Eddeland Student: William Skaggs

"Although the text-tool in GIMP works right now, it could be even better and more convenient with more functionality. When editing text you type the text in a dialog instead of on the canvas itself. I found "on-canvas text editing" as one of the ideas listed on the GIMP GSoC ideas page, and thought it would be a good idea to implement, as it would make the text tool more ergonomic and also look a little better (less dialogs to keep track off = cleaner interface)."

Enhance Python Scripting Interface Experience

Mentor: João Sebastião de Oliveira Bueno Student: Lars-Peter Clausen

"The overall goal of this project is to enhance the python scripting interface experience for The GIMP.

As part of this I'll creating binding for gimp objects and widgets that haven't a binding yet but would be useful to have in python scripts. I'll also in collaboration with the community identify other missing or nice to have aspects in the python scripting interface and then try add them."

Tagging of GIMP Resources

Mentor: Aurimas Juska Student: Sven Neumann

"Currently resources such as brushes, gradients, etc are presented to the user in a single list without a possibility to organize them in any way. This makes it impossible to deal with large number of resources efficiently, thus making the GIMP less attractive for both professional and casual users.

Adding tags to resources is natural and convenient way for users to organize their collection of resources so they could quickly find the ones they want for the specific task and create their own collections easily."

Operations in Frequency Domain

Mentor: Øyvind Kolås Student: Zhang Junbo

"Many of the image processing operations in the spatial domain are very difficult or even impossible, but in the frequency domain it may be quite simple. But GEGL, the new framework of GIMP, has not support operations in frequency domain yet. Therefore, a collection of operations in frequency domain for GEGL is urgently needed.

A good framework has been provided in GEGL. Operations(plug-ins) in frequency domain could be implemented modularly."

GSoC 2007 - GIMP wasn't accepted =(

Projects finished in GSoC 2006

JPEG2000 plug-in

There is a number of file formats that GIMP should support, but doesn't or at least doesn't support fully, for example JPEG 2000.

Vector layers and tools to manipulate them

Mentor: Simon Budig Student: Hendrik Boom

Have Vector layers that are connected to (multiple) vectors objects (think paths) and get re-rendered when the vectors change. Make it possible to attach styles to the vectors and maybe add different types of vector shapes (rectangles, ellipses...). Make all this usable...

Ruby binding for GIMP scripting

Mentor: Kevin Cozens Student: Scott Lembcke

Ruby is an object-oriented language that is driven by the „principle of least surprise“ - it tries to avoid all the pitfalls and caveats other languages have. There is an ancient version of a GIMP binding, it would be interesting to have it resurrected (with as little undead side effects as possible

Healing brush

Mentor: Manish Singh Student: Kevin Sookocheff

Removing freckles or other spots from skin can be tedious - the clone tool helps, but sometimes it is hard to find the right spot to clone from. A "healing brush", as it is named in other programs, removes the spots by e.g. averaging the surrounding area; other approaches are possible as well.

Vanishing point cloning

Mentor: Manish Singh Student: Pedro Alonso

Photoshop got an interesting tool recently - similar to clone, but it applies a perspective transform to the texture. Think about changing or "repairing" a tiled floor of a hallway on a photo - it is easy to create a flat tile texture, but it has to be transformed correctly when applying it

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