Backlight adjustment method, device, system, head-up display and storage medium

A device for adjusting backlight, the device being applied to a Head-Up Display and comprising:

• an image acquisition circuit, configured to acquire an image projected by the Head-Up Display onto a target region;
• an image-region brightness-value determination circuit, configured to divide the image into a plurality of image regions, and acquire a brightness value of each image region of the plurality of image regions;
• a brightness adjustment value determination circuit, configured to determine a brightness adjustment value of the each image region of the plurality of image regions according to the brightness value and a target brightness value of the each image region;
• a brightness adjustment signal generation circuit, configured to generate, according to the brightness adjustment value of the each image region, a brightness adjustment signal to be applied to one or more light sources of a backlight region corresponding to the each image region in the Head-Up Display, such that the brightness value of the each image region reaches the target brightness value.