The proposed library implements High Dynamic Range (HDR) merging and tone mapping of images and videos. Tone mapping algorithm can be used for a wide range of scenes. Library is implemented in C/C++ and it is platform independent (only dependency is OpenCV and CUDA). Proposed tone-mapping algorithm is based on Durand and Dorsey, which is based on the idea of decomposition of image into two separate layers - a base layer and a detail layer. The library also implements a real-time HDR merging algorithm developed at BUT. This technique minimizes ghosting artifacts typical for HDR video.