LUT Transformation using trilinear interpolation algorithm

This project is aimed at fetching transformation data from a LUT .cube file and interpolating for all possible 0 to 255 RGB values. Later on we can apply the LUT transorms very quickly to any frame. For this example I am using a video to apply LUT frame by frame.

We can skip the part where I am getting the video in uyvy colour space and instead put -pix_fmt rgb24 for direct RGB colour spaces. Doing this you will not have to convert uyvy to RGB later on in the code.

Used this repo code for trilinear interpolation algorithm

Dependencies

• FFMPEG
  • sudo apt update
  • sudo apt install ffmpeg
• OpenCV
  • Install OpenCV from here
• CUDA[Optional. You can modify the code to not use CUDA if you wish.]
  • CUDA supporting graphics card
  • CUDA Toolkit

Building and Running

• Create a build directory inside the source and run following commands in that build directory:

  cmake ..

  make

• To run use the following commands: ./lut <size of the LUT> /path/to/the/cube/file