What does HDR mean in a mobile phone camera?

HDR means High Dynamic Range Imaging, English: high dynamic range imaging, abbreviated as HDRI or HDR.

HDR images are rich in information and rich in light and shadow details; Includes pre-shooting and post-processing; The effect of composite photos is very different from that of secondary imaging and direct output of digital photos.

HDR is a set of technology used to achieve a larger exposure dynamic range (i.e., a greater difference between light and dark) than ordinary digital image technology. The purpose of high dynamic range imaging is to correctly represent the brightness in the real world from direct sunlight to the darkest shadow.

Extended data

HDR has certain technical requirements for photographers. These characteristics of HDR determine that it is only suitable for shooting certain subjects.

Sunset, sunrise and night scene are good subjects for shooting HDR. The contrast between the sky and the surface scenery in this kind of theme picture is great, and the state range of digital camera can not meet such a large dynamic range, so it is the most suitable application theme for HDR. Especially when shooting night scenes, HDR can well show the contrast effect between the weak light in the sky and the ground light source, which can not be recorded in general night scenes.

Baidu encyclopedia -HDR photography