Patent ID: 11863727
Assignee: ZHUHAI PANTUM ELECTRONICS CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC H

Claim 0:
1. An image calibration method, comprising:
acquiring, by an image formation device with normal calibration and normal uniformity, at least one of a first end color density value or a second end color density value of a calibration reference image along a direction to be calibrated;
calculating a difference between the at least one of the first end color density value or the second end color density value and a target color density value, to obtain at least one of a first end color density difference value or a second end color density difference value, wherein a correct color density value matching the calibration reference image is preset as the target color density value; and
performing uniformity calibration on an image to be calibrated if the at least one of the first end color density difference value or the second end color density difference value is greater than or equal to a preset difference threshold,
wherein said performing uniformity calibration on an image to be calibrated comprises:
calculating, by interpolation fitting, a compensation color density value of an image to be calibrated by taking a reference axis of the image to be calibrated as a standard position, wherein the reference axis is perpendicular to the direction to be calibrated; and
blending an original bitmap image of the image to be calibrated with a compensation bitmap image corresponding to the compensation color density value to obtain a calibrated image,

wherein prior to blending an original bitmap image of the image to be calibrated with a compensation bitmap image corresponding to the compensation color density value to obtain a calibrated image, the image calibration method further comprises:
converting the compensation color density value into a corresponding pixel gray value;
converting the pixel gray value into corresponding raster lattice data; and
determining, based on a black point distribution characteristic of the raster lattice data, whether or not to perform uniformity calibration on the image to be calibrated.