jakubochnik / cudaimageprocessor

A simple GPU-accelerated command line image processor.

GPU-accelerated image processor

A simple GPU-accelerated command-line image processor. Image processing features are implemented on a GPU using CUDA, which can significantly speed-up hi-res image processing.

External libraries used:

• NVIDIA CUDA (a capable GPU is required)
• OpenCV
• Boost

Features:

• Command-line UI
• Edit history (with undo and redo functions)
• NVIDIA GPU driver detection and CUDA availability checking on Windows and Linux
• Basic image processing operations

In development:

• Histogram
• Applying custom LUTs
• Batch image processing
• GUI
• And more!

Currently available commands:

General functions:
- quit - Exits the program
- load [file_path] - Loads the image from the selected path
- save [file_path] - Saves the edited image to the selected path
- undo - Reverts the latest change
- redo - Performs the latest reverted action
- show [~scale] - Opens the image preview window. If the custom scale (in percentage, i.e. 75% -> scale = 75) is not specified, the window will be automatically scaled to fit 80% of main screen's vertical resolution.
- history - Shows the history of changes
- clear - Clears the notification area
- help - Shows the help screen

Actions:
- brightness [value] - Changes brightness of the image by specified value (it can be either negative or positive number)
- contrast [value] - Changes contrast of the image by specified value (range: <-255,255>)
- equalize - Performs histogram equalization (automatic global contrast correction)
- invert - Inverts colors of the image
- crop [x] [y] [width] [height] - Trims the image from the coordinates (x,y) to (x+width, y+height). Constraints: x+width < full width; y+height < full height.
- resize [width] [height] - Resizes the image to the specified size

(~ - optional)

cudaimageprocessor's Issues

GPU pointer is not being updated when executing "undo"

Steps:

1. load *IMAGE_PATH*
2. brightness 100
3. undo
4. brightness -50  

**brightness is actually 50, not -50**

Description:
GPU pointer might be not updated, implement this in undoAction().

GPU pointer gets damaged when changing image size

Steps:

1. load *IMG_PATH*
2. resize *NEW_SIZE_X* *NEW_SIZE_Y*
3. contrast *any number*
4. show  

**Image is broken**

Description:
There seems to be a problem with the GPU memory reallocation process.
As GPU memory leaks may lead to display driver crashes, be highly cautious (especially with debugging).