HDR means High Dynamic Range
HDR is a term from the world of photography: HDR Photography Creates an image with a wider tonal range that is larger than normal with 1 image. In some cameras, HDR is an option that can be selected: In this case, multiple images are created sequentially and the camera combines it to 1 image. Mostly HDR images are made using software. Software can be made up of different images that are combined to 1 image (just like in the camera). And another way is that a photograph is made of three copies, after which each image is edited separately, and then these separate images are combined again into one image.