HDR is an acronym for High Dynamic Range. Camera sensors can’t resolve detail in as wide a range of brightness as the human eye, which leads to things like interior photos where the windows are just blobs of white. To combat this, we use computer algorithms to blend over-exposed and under-exposed images with a normal image to bring out more detail across a much wider range of brightness than a single exposure can record. Depending on the settings used, the result can be a very natural looking image or a surreal exaggeration. The technique requires multiple exposures of an identical scene, so it works well for static subjects, like landscapes and architecture, but not for a scene that contains people and other moving things.