What does hdr mean? Introduction of camera hdr function

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

The HDR (high dynamic range) of the camera is realized by the multi-camera technology. The mobile phone presses the shutter, automatically takes several photos with different exposures, and then automatically synthesizes them to ensure rich details in the dark and accurate restoration in the bright. Therefore, the HDR of the camera is not that the camera itself can shoot in a high dynamic range, but through software to achieve photos similar to the naked eye but not exposed in the dark.

Extended data

Images taken in HDR mode can keep more dynamic range and image details in the picture, so that your photos can be clearly displayed in highlights and shadows. The most popular statement is that highlights are not exposed and dark parts are not exposed.

The image shot by HDR is an image with a very wide brightness range, which has more brightness data storage than other formats, and its way of recording brightness is also different from that of traditional pictures. It records brightness information in a directly corresponding way, which can be said to record illumination information in the picture environment.

The image quality improvement brought by HDR technology is intuitive and tangible, and even ordinary viewers can distinguish it with the naked eye. Therefore, many manufacturers installed HDR technology on TV products this year. But even so, not all TV products can become "good rivals" of HDR technology. After all, the application of HDR technology is not a single link, but related to the entire ecosystem of screen display.

Refer to Baidu Encyclopedia -HDR