Image brightness adjustment method and apparatus

The invention discloses an image brightness adjustment method and apparatus and belongs to the technical field of display. The method comprises the following steps: obtaining a first image when a display screen displays a low-gray-scale image; determining a brightness compensation value of each pixel point of the first image, wherein the brightness compensation values are used for compensating brightness values of the pixel points to enable the brightness values to be greater or equal to a standard brightness value, and the standard brightness value is a brightness value of the low-gray-scale image; and according to the brightness compensation value of each pixel point of the first image, compensating corresponding pixel points of a target image, wherein the target image is an image which is disposed in the same display period with the first image on the display screen. According to the invention, the brightness value of each pixel point in the target image after brightness compensation can be enabled to be g