Picture color map changer

Picture color map changer allows the user to change the color map of a picture.

Referencing: Kiesiläinen, J. & Tuovinen, T. (2018) Computer Vision Aided Data Extraction from CM and CFD Results. Conference paper: 6th European Conference on Computational Mechanics (ECCM 6) & 7th European Conference on Computational Fluid Dynamics (ECFD 7).