Dome screen demarcating method, demarcating system and control device

Abstract

The embodiments of the invention provide a dome screen demarcating method, a demarcating system and a control device. The method includes the following steps: constructing in advance a mapping sphere model W of a sphere camera, and acquiring a position T of the sphere camera in a dome screen space; determining a coordinate X of a sampling point of a demarcating image which is projected by a first projector on the sphere camera, in accordance with the mapping sphere model W and the position T of the sphere camera in the dome screen, acquiring a position coordinate Z of the coordinate X of the sampling point in the sphere screen space; in accordance with the coordinate V of the first projector and the coordinate Z of the coordinate X of the sampling point in the sphere screen space, constructing a mathematics conversion model U1 of the demarcating image projected by the first projector to a dome screen image; using the aforementioned method, constructing mathematics conversion models U2......Un of demarcating images output by other projectors to the dome screen images, in which n is the number of the projectors; in accordance with the mathematics conversion models U1......Un, generating the complete dome screen image.

Description

technical field [0001] The invention relates to the field of image processing, in particular to a ball screen calibration method, calibration system and control equipment. Background technique [0002] The size of the current dome display playback system includes various sizes from small size (0.5m-3.0m in diameter) to large size (more than 5m in diameter). The small size dome display system is suitable for advertising because of its general projection effect , or as a decorative occasion, and is often placed outdoors for viewing; while a large-size dome display system has a good projection effect and a strong three-dimensional effect, and is suitable for high-demand occasions such as special large-scale theaters and virtual reality devices. use. [0003] In the existing technology, the general small-size dome display system uses a single projector to realize it through a fisheye lens. Even if a high-resolution and high-brightness projector is used, the resolution and color...

AI Technical Summary

Problems solved by technology

[0004] 1) It is necessary to manually splice the projection screen, so the construction work is intensive and the time period is long, especially due to the poor accuracy of human operation;

[0005] 2) After a period of operation of the large-size dome display playback system, the projectors are constantly shifted, causing the splicing effect to deteriorate and need to be re-calibrated, so the later maintenance costs are relatively high;

[0006] 3) Since the projection screen of the projector is seriously deformed, and manual splicing requires a relatively regular projection screen, the redundant projection area will be cut off during the splicing of the dome screen, which will affect the pixel utilization of the projector. At the same time, the optical path design requires more High, increasing implementation cost

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