README.md

This application is a school project to Multimedia course. It implements several image and video effects in OpenCL, which can be applied to selected file or interactively previewed in a simple video player.

Available filters/effects are:

• grayscale conversion
• sepia conversion
• color inversion
• generic affine 2D transformation (user has to enter the transformation matrix)
• 2D convolution (user has to specify the convolution mask)
• 2D separable convolution (for filters that are separable, like gaussian blur)
• Sobel operator
• Embossing
• Difference of gaussians
• Gaussian blur
• Oilify (an oil painting effect, this is the slowest filter of all)
• Shake (simulates shaking camera)

Other features and highlights:

• every filter is implemented using OpenCL and some are also implemented in straight C++
• all filters can be easily chained into a linear filter pipeline and thus create a new more sophisticated filter, which is not directly implemented in the program
• adding, removing and chaining the filters works in realtime, i.e while playing the video (this is achieved via a clever MVC design)
• the program uses modified QOpenCL library, which allows for very easy OpenCL initialization (the original project seems to be dead as of jun 2014, so we had to fix some issues ourselves)
• the program also uses OpenCV to load/save and parse video files into frames

Screenshots: