Method, apparatus, device, and medium for compensating brightness

An apparatus for compensating brightness, comprising:

• an anchor point arrangement module configured to arrange a plurality of first anchor points and at least one fixed anchor point in a display area of a display panel;
• a first compensation gain determination module configured to divide the display area of the display panel into a plurality of adjustment areas each comprising at least one of the first anchor points, and determine a first compensation gain for each of the adjustment areas under a grey scale image to be compensated;
• a second compensation gain determination module configured to determine a second compensation gain corresponding to the first anchor point according to a brightness value corresponding to the first anchor point, a brightness value corresponding to the fixed anchor point, and the first compensation gain of the adjustment area to which the first anchor point belongs;
• and
• a compensation module configured to perform brightness compensation on a pixel corresponding to the first anchor point according to the second compensation gain.