An image processing apparatus according to an embodiment includes a setting unit that sets an operator including a target pixel in a process target image, a totaling unit that acquires a gradation value of each pixel within the operator, and generates a histogram indicating the number of pixels corresponding to each gradation value from 0 to a natural number N, and a conversion unit that calculates a new gradation value by adding together the number of pixels corresponding to each of the respective gradation values ranging from gradation value 0 to the gradation value of the target pixel, or by subtracting, from gradation value N, the combined number of pixels corresponding to the respective gradation values ranging from the gradation value of the target pixel to gradation value N, and converts the gradation value of the target pixel into the new gradation value.

A grayscale adjustment method of a display panel, a grayscale adjustment device and a display device using the same are provided. The grayscale adjustment method includes steps of capturing an image of the display panel to obtain a current image; identifying a non-uniform block in the current image, and detecting an original output brightness value and an original input grayscale of the non-uniform block; determining a target input grayscale corresponding to a preset target brightness value according to an actual gamma curve value, wherein the actual gamma curve value is obtained by testing the display panel; and setting a difference between the original input grayscale and the target input grayscale as a grayscale compensation value of the non-uniform block.

The present disclosure discloses a method and device (302) for adjusting grayscale of display panel, the method includes: performing image capture on the display panel, and obtaining a current image (S10); identifying an uneven area in the current image, and detecting original output brightness and original input grayscale of the uneven area (S20); determining a target input grayscale corresponding to a preset target brightness according to actual Gamma curve value which is obtained by testing the display panel (S30); using the difference between the original input grayscale and the target input grayscale as grayscale compensation value of the uneven area (S40).

The present disclosure discloses a method and device (302) for adjusting grayscale of display panel, the method includes: performing image capture on the display panel, and obtaining a current image (S10); identifying an uneven area in the current image, and detecting original output brightness and original input grayscale of the uneven area (S20); determining a target input grayscale corresponding to a preset target brightness according to actual Gamma curve value which is obtained by testing the display panel (S30); using the difference between the original input grayscale and the target input grayscale as grayscale compensation value of the uneven area (S40).

The present invention discloses a gray scale adjustment method and device for a display panel. The method includes: performing an image acquisition on the display panel to obtain a current image; identifying a relationship between a sum of gray scale values of all pixels in the current image and a target value by a distinguishing method, in order to identify an uneven block in the current image; detecting an original output luminance and an original input gray scale of the uneven block; determining a target input gray scale corresponding to a preset target luminance according to an actual gamma curve value obtained by testing the display panel; and taking a difference between the original input gray scale and the target input gray scale as a gray scale compensation value of the uneven block.

Disclosed are a method and a device for adjusting grayscale of display panel, the method includes: obtaining a current image by performing image acquisition of a display panel; identifying an nonuniform block in the current image, detecting original output brightness and original input grayscale of the nonuniform block; determining a target input grayscale corresponding to a preset target brightness according to an actual Gamma curve value, wherein the actual Gamma curve value is obtained by testing the display panel; taking a difference between the original input grayscale and the target input grayscale as a grayscale compensation value of the nonuniform block.

The present disclosure discloses a method and a device for adjusting gray scale of a display panel, the method comprises: performing image acquisition on a display panel, and obtaining a current image; identifying an nonuniform block in the current image, and detecting an original output brightness and an original input gray scale of the nonuniform block; determining a target input gray scale corresponding to a preset target brightness according to an actual Gamma curve value, the actual Gamma curve value is obtained through testing the display panel; using a difference value between the original input gray scale and the target input gray scale as a gray scale compensation value of the nonuniform block.

The present invention discloses a gray scale adjustment method and device for a display panel. The method includes: performing an image acquisition on the display panel to obtain a current image; identifying a relationship between a sum of gray scale values of all pixels in the current image and a target value by a distinguishing method, in order to identify an uneven block in the current image; detecting an original output luminance and an original input gray scale of the uneven block; determining a target input gray scale corresponding to a preset target luminance according to an actual gamma curve value obtained by testing the display panel; and taking a difference between the original input gray scale and the target input gray scale as a gray scale compensation value of the uneven block.

A storage device stores dither patterns composed of a three-dimensional block consisting of the number H of dots in a horizontal directionthe number V of lines in a vertical directionthe number F in a frame direction. Each value from a minimum value to a maximum value of dither values of n bits is written in each address of the storage device. When each value is written into the storage device, processing of obtaining a spatiotemporal density value indicating a degree of density of an address in which a dither value has already been written in a three-dimensional predetermined area centered on each of the addresses in which a new dither value is writable, and processing of selecting an address having the smallest spatiotemporal density value among the addresses in which a new dither value is writable and writing a dither value are repeated.

The present invention discloses a gray scale adjustment method and device for a display panel. The method includes: performing an image acquisition on the display panel to obtain a current image; identifying a relationship between an average value of gray scale values of all pixels in a set range in the current image and a target value by a distinguishing method, in order to identify an uneven block in the current image; detecting an original output luminance and an original input gray scale of the uneven block; determining a target input gray scale corresponding to a preset target luminance according to an actual gamma curve value obtained by testing the display panel; and taking a difference between the original input gray scale and the target input gray scale as a gray scale compensation value of the uneven block.