Compared with ordinary images, it can provide more dynamic range and image details.
According to LDR (Low-Dynamic Range) images with different exposure times, the final HDR image is synthesized by using LDR images with the best details corresponding to each exposure time. Can better reflect the visual effect in the real environment. In addition to the ordinary RGB information, each pixel also has the actual brightness information of the point.
Ordinary graphics files only have a grayscale range of 0-255 per pixel, which is actually not enough.