Is the original hdr on or off?

Hdr can provide more dynamic range and image details, which can greatly improve the contrast between light and dark in the original picture details and better improve the visual effect.

In computer graphics and cinematography, HDR is a set of technologies used to achieve a larger exposure dynamic range 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.