A high dynamic range image or high contrast image is a digital image that represents the naturally occurring large brightness differences similar to the sensitivity of the human eye.
While areas with different contrast appear in normal shots, HDR images are almost identical in depth.
Such "high-contrast images" arise from several photos taken in the form of a so-called exposure series which later on the PC (or in some cameras automatically immediately after shooting) are combined into a single.
"Real" HDR photos can not be displayed on normal screens, so they are converted to LDR (Low Dynamic Range) images and compressed, but with a certain "look" (tone mapping).
The photos taken by me have been created from three frames, each with different exposure, these partly from continuous shots and partly from only a single photo.
For me personally, HDR stands for an artistic umbrella term, a certain effect that moves between surrealism, perfection and exaggeration.