Regarding the wide dynamic and backlight compensation, which of the following statements are correct? (Multiple choice)

Regarding the wide dynamic and backlight compensation, which of the following statements are correct? (Multiple choice)
A . Wide dynamic technology is an upgraded version of backlight compensation technology
B . Wide dynamic is to solve the problem of poor image quality caused by the presence of bright areas and shadow areas in the picture
C . Backlight compensation and wide dynamic are both technical means to see the target clearly under strong backlight conditions
D . The working principle of backlight compensation is to take a high-shutter picture now, then take a low-shutter picture, and then merge the two pictures to finally present a clear and complete image

Answer: ABC