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A Distortion Correction Method for Large Field of View Head Mounted Display Devices Based on Multi-angle Sampling

A display device and distortion correction technology, applied in image enhancement, instrumentation, computing, etc., can solve problems such as inability to obtain full-frame distorted images

Active Publication Date: 2021-05-07
ZHEJIANG UNIV
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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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  • A Distortion Correction Method for Large Field of View Head Mounted Display Devices Based on Multi-angle Sampling
  • A Distortion Correction Method for Large Field of View Head Mounted Display Devices Based on Multi-angle Sampling
  • A Distortion Correction Method for Large Field of View Head Mounted Display Devices Based on Multi-angle Sampling

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Embodiment Construction

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

[0027] like figure 1 A schematic structural diagram of the head-mounted display device corrected in this embodiment is shown, but 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] like figure 2 A schematic diagram of the calibration device used in this embodiment is shown, but not limited to this structure. The correction device includes a first rotary table 1, a second rotary table 2, a computer and a CCD camera 3 for capturing HMD4 distorted images; according to the right-hand rule to establish a referenc...

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Abstract

The invention discloses a multi-angle sampling-based HMD distortion correction method for a head-mounted display device with a large field of view. Place the camera at the exit pupil position of the head-mounted display device, rotate the camera to take multiple shots to obtain a local distorted image covering the full frame, and transform the local distorted images taken at other angles to the camera imaging plane parallel to the HMD image plane, and then Stitching to get the full-frame distorted image of the HMD. By performing regional Bessel fitting on the full-frame distorted image, the mapping table between the pixels of the HMD screen and the pixels of the full-frame distorted image is obtained, and finally the original image is pre-distorted according to the mapping table to realize the distortion correction of the HMD. The invention solves the problem that a camera cannot acquire a full-frame distorted image in a single acquisition in the case of a large field of view, and is suitable for 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 a head-mounted display device with a large field of view 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. The immersive head-mounted display device uses an optical system to magnify the image on the display near the eye to a virtual image in the distance. Such an optical system often introduces obvious optical distortion, that is, the virtual image seen by the user through the head-mounted display device has obvious existence. deformed. In the design of head-mounted display devices, due to the limitation of actual cost and device volume, it is difficult to achieve optical distortion correction simply by optimizing th...

Claims

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Application Information

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Patent Type & Authority Patents(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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