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Large-view-field head-mounted display equipment distortion correction method based on multi-angle sampling

A display device and distortion correction technology, applied in image data processing, optics, instruments, etc., can solve problems such as inability to obtain full-frame distorted images

Active Publication Date: 2019-08-30
ZHEJIANG UNIV
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  • Description
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to design a method that can realize the distortion correction of a head-mounted display device with a large field of view, solve the problem that the camera cannot obtain a full-frame distorted image with a single sampling, and is suitable for non-axisymmetric optical systems

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  • Large-view-field head-mounted display equipment distortion correction method based on multi-angle sampling

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Embodiment Construction

[0026] The present invention will be described in detail below in conjunction with the embodiments and accompanying drawings, but the present invention is not limited thereto.

[0027] Such as figure 1 What is shown is a schematic structural diagram of the head-mounted display device corrected in this embodiment, but is not limited to this structure. The head-mounted display device includes two monocular systems; each monocular system includes a lens group sequentially arranged in front of the human eye and a display screen placed behind the lens group; the lens group includes two groups of lenses, each group The lens corresponds to an OLED display.

[0028] Such as figure 2 Shown is a schematic diagram of the calibration device used in this embodiment, but is not limited to this structure. This correcting device comprises the first rotary table 1, the second rotary table 2, a computer and a CCD camera 3 that captures the use of HMD4 distortion image; According to the righ...

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Abstract

The invention discloses a large-view-field head-mounted display (HMD) equipment distortion correction method based on multi-angle sampling, and the method comprises the steps of correcting the distortion of a camera firstly, and drawing a mark dot matrix graph on a display screen of the HMD; placing the camera at the exit pupil position of the head-mounted display device, rotating the camera for multiple times to obtain a local distortion image covering the full picture, converting the local distortion images shot at other angles into a camera imaging plane parallel to the HMD image plane, andthen splicing to obtain the full picture distortion image of the HMD. According to the method, the regional Bessel fitting is carried out on a full-frame distorted image, a mapping table of HMD screen pixel points and full-frame distorted image pixel points is obtained, and finally the pre-distortion is carried out on an original image according to the mapping table, so that the HMD distortion correction is achieved. The method solves the problem that the full-picture distortion image cannot be obtained through the single collection of the camera under the condition of a large field of view,and is suitable for the distortion correction of a non-axisymmetric optical system.

Description

technical field [0001] The invention relates to the field of distortion correction of head-mounted display devices, in particular to a method for realizing full-frame distortion correction of large-field-of-view head-mounted display devices through multi-angle sampling and splicing. Background technique [0002] With the rapid development of computer graphics and display technology, immersive head-mounted display technology is becoming more and more mature. Immersive head-mounted display devices use an optical system to magnify the image on the display near the eye into a virtual image in the distance. Such an optical system often introduces obvious optical distortion, that is, the virtual image that the user sees through the head-mounted display device has obvious Deformed. In the design of head-mounted display devices, due to the limitations of actual cost and device volume, it is difficult to correct optical distortion simply by optimizing the optical system. At this ti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00G02B27/01
CPCG02B27/01G06T5/80
Inventor 李海峰李海丽陆驰豪刘旭
Owner ZHEJIANG UNIV
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