Spherical video image correction method

Abstract

The invention discloses a spherical video image correction method, which belongs to the technical field of video processing, and is characterized by comprising the following steps of: a, determining adisplay field angle parameter of each channel; b, generating a multi-channel rectangular graph, and synchronously outputting the multi-channel rectangular graph to a rear-end graph corrector for geometric correction of the graph from a plane to a spherical surface; c, converting each channel image into a curved surface image by the graph corrector; d, storing the graphic correction parameters inFLASH; and e, projecting the pre-deformed image onto a hemispherical projection screen by the projector model for presenting a real target image. Geometric transformation from a plane image to a spherical image can be achieved by loading the parameters through hardware electrification, and image acquisition, grid correction, feature point acquisition and calculation of a limited display area are not needed; effective pixels of a video image are fully utilized, real-time correction processing of the video image is achieved, reusability of parameters between channels is enhanced, and secondary correction of later maintenance is avoided.

Description

technical field

[0001] The invention relates to the technical field of video processing, in particular to a spherical video image correction method. Background technique

[0002] Immersive dome displays all use projection display technology. Multiple projectors use image splicing and fusion to realize the dome display function. On the one hand, it is difficult to achieve full-field display in this way, especially in real image display systems. Because once an observer or object is inside the system, it will block part of the display area; on the other hand, in addition to image geometric correction, this display method also needs image stitching and image fusion. Due to the large stitching and fusion area, The actual pixel utilization per projector is very small.

[0003] In order to solve many problems of projectors such as small field of view, low contrast, short lifespan, high price and difficult maintenance, the LED visual spherical screen display scheme is proposed, wh...

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