Patent ID: 11961484
Assignee: XI'AN NOVASTAR TECH CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G  H

Claim 0:
1. A correction method for free full-screen splicing, comprising:
acquiring a collected image during displaying of a target picture on a spliced display screen, wherein the collected image is collected by an image collection device;
performing image information processing on the collected image to acquire multiple pieces of pixel color information data of the spliced display screen, wherein the multiple pieces of pixel color information data are multiple pieces of brightness data or multiple pieces of chromaticity data, the multiple pieces of pixel color information data are still consistent with a curved surface form but are also locally discrete;
performing curved surface simulation based on the multiple pieces of pixel color information data to obtain a pixel color information distribution curved surface;
obtaining multiple pieces of real pixel color information data based on the multiple pieces of pixel color information data and the pixel color information distribution curved surface;
setting correction target color information data, and obtaining color information correction coefficients of multiple pixels of the spliced display screen by taking the multiple pieces of real pixel color information data as initial color information data; and
uploading the color information correction coefficients of the multiple pixels to the spliced display screen;
the step of performing curved surface simulation based on the multiple pieces of pixel color information data to obtain the pixel color information distribution curved surface comprises: preprocessing the multiple pieces of pixel color information data to obtain multiple pieces of preprocessed pixel color information data, and performing curved surface simulation based on the multiple pieces of preprocessed pixel color information data to obtain the pixel color information distribution curved surface;
wherein the step of preprocessing the multiple pieces of pixel color information data to obtain the multiple pieces of preprocessed pixel color information data comprises: determining at least one exceptional point of the spliced display screen, and eliminating influence of the at least one exceptional point; and/or determining a position of a bright/dark block of the spliced display screen, and regulating brightness of the bright/dark block;
wherein the step of determining the exceptional point of the spliced display screen and eliminating the influence of the at least one exceptional point comprises: sequencing the multiple pieces of pixel color information data according to an order of size, determining a pixel corresponding to the pixel color information data greater than a first threshold value as an exceptional bright point, and setting a median of the multiple pieces of pixel color information data as the pixel color information data of the exceptional bright point; the exceptional bright point is a controllable point, the exceptional dark point is an uncontrollable point;
the step of performing curved surface simulation based on the multiple pieces of preprocessed pixel color information data to obtain the pixel color information distribution curved surface comprises: performing curved surface simulation by use of a smoothing method or a fitting method to obtain the pixel color information distribution curved surface; and
the step of obtaining the multiple pieces of real pixel color information data based on the multiple pieces of preprocessed pixel color information data and the pixel color information distribution curved surface comprises: dividing the multiple pieces of preprocessed pixel color information data by data of corresponding positions in the pixel color information distribution curved surface respectively to obtain the multiple pieces of real pixel color information data, wherein influence of the pixel color information distribution curved surface is eliminated from the image data to obtain a piece of discrete real pixel brightness data.