High-robustness geometric correction method adapted to random projector group and projection screen

Abstract

The invention belongs to image display processing of a computer system, and especially relates to a high-robustness automatic geometric correction method. In the method, a fine mapping relation between a projection characteristic image and a camera multi-view image is about to be established so as to form an incident light angle coordinate relation grid of each pixel in a projection image relative to an observation point and enable a complex three-dimensional geometric calibration problem to change to a relatively simple two-dimensional geometric calibration problem. Based on this, by means of a high dynamic range imaging technology, color information of each pixel position of a projector can be measured by use of a common camera and a low-precision holder, a light field distribution mathematic model on a whole projection curtain is established, and a high-speed calculating process for color correction and edge fusion of all projectors can be autonomously finished through a non-linear optimization solving technology.

Description

technical field [0001] The invention belongs to the image display processing of the computer system, in particular to a highly robust and fully automatic geometric correction method Background technique [0002] Projection screens in large-scale virtual spaces are generally complex curved screens, and the projection images have serious nonlinear deformation on the screen, which requires "geometric correction". Since there are overlapping areas in the projection images of different projectors, edge fusion needs to be performed on the basis of global geometric alignment. In order to achieve a visually seamless projected picture, color consistency correction is also required for all projectors. Therefore, in a complete large-scale, highly immersive virtual space display system construction project, there are "projection screen generation", "screen segmentation", "global geometric alignment", "projector color characteristic measurement", "projection screen internal geometry Co...

AI Technical Summary

Problems solved by technology

[0003] The present invention proposes a set of high-robust full-automatic correction method suitable for large-scale multi-projection fusion display system, aiming at the situation that the automatic correction system of large-scale and complex screen system lacks high-robust projection high-speed fusion and driving technology, and forms a A high-speed, low-maintenance solution to meet the actual needs of geometric correction in large-scale commercial projector fusion display systems

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