Multi-projector combined display feedback brightness correction method

Abstract

The invention discloses a multi-projector combined display based feedback brightness correction method, belonging to the field of multi-projector combined display based large-screen high-resolution display technologies. The multi-projector combined display based feedback brightness correction method is characterized by being realized in a closed-loop feedback brightness correction system consisting of a projector array, a digital camera, a server and a client computer, wherein the server obtains grids for geometry correction through the relation between a characteristic point image and characteristic points of a projection space, sends an initial template to a client, and circularly performs the process of brightness decay, projecting, image acquisition and template updating to obtain a template with corrected brightness; and the client performs geometry correction and brightness correction for every image transmitted by the server so as to obtain a seamlessly spliced big picture on a large screen. The combined display based feedback brightness correction method has the advantages of simpleness for operation and natural picture.

Description

technical field [0001] The invention relates to brightness correction of multi-projector combination display, which realizes consistent brightness of large-screen high-resolution display of multi-projector combination display. Background technique [0002] The brightness correction of the existing multi-projector large-screen splicing display uses multiple projectors to splicing and displaying a large picture on the large screen. There is an overlapping area between adjacent projectors, that is, the corresponding projected image There are overlapping areas, and the bright bands in the overlapping areas can be eliminated by software or hardware methods, so as to realize the seamless splicing display of multi-projector large screens. Existing software brightness correction methods are divided into two categories according to whether to use camera feedback brightness: methods that require camera feedback brightness and methods that do not require camera feedback brightness. ...

AI Technical Summary

Problems solved by technology

The method based on luminance fusion only considers the luminance difference in the overlapping area of ​​the projectors, and does not consider the luminance difference between projectors and within the projector.

Therefore, when the brightness difference of each point inside the projector and the brightness difference between projectors are large, the correction effect of consistent brightness cannot be achieved.

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