Virtuality-reality head-mounted display equipment distortion parameter measuring method

Abstract

The invention discloses a virtuality-reality head-mounted display equipment distortion parameter measuring method. According to the method, a screen is made to output a formwork drawing having a coordinate system, and a virtual image is captured by employing a camera instead of eyes; an image shot by the camera is processed through image processing software so as to correct self distortion of the camera, and a corresponding coordinate is extracted; through sampling a coordinate position of an original formwork drawing and a distorted coordinate position after lens imaging, a distortion parameter of certain single-color light is figured out; the screen is made to sequentially output coordinate formwork drawings of R, G and B three colors, the previous steps are repeated, and each distortion parameter of R, G and B is acquired. Through the method, on the basis of an actual imaging state of VR head-mounted display equipment, the virtual image is captured by employing the camera instead of the eyes, repeated debugging of the parameter can be avoided, moreover, developers are not required to have basic knowledge of optical design, so reliability or operation difficulty is better than a method determining the distortion parameter through theoretical simulation.

Description

technical field [0001] The invention relates to the technical field of virtual reality, in particular to a method for measuring distortion parameters of a virtual reality head-mounted display device. Background technique [0002] Due to the limited volume of VR head-mounted display equipment, the screen is very close to the human eye, so optical lenses are generally used to image the screen in the clear vision range of the human eye. Due to the introduction of the optical lens structure, its inherent imaging defect, namely aberration It brings a decline in the experience of the device. Among them, distortion and dispersion are two obvious defects that have received extensive attention. The shape of the object is deformed relative to the object, which is a kind of monochromatic aberration, and the dispersion is caused by the different refractive index of the lens for different wavelengths of light. Since the screen only outputs RGB three monochromatic lights, in fact the disp...

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Problems solved by technology

[0003] At present, the general method used to obtain the distortion parameters of VR head-mounted display equipment is to use optical design software (such as ZEMAX) to theoretically model the lens model, simulate the distortion of lens imaging, and then deduce the corresponding anti-distortion algorithm, but Due to the existence of installation tolerances in the manufacture of lenses and molds, perfect corrections cannot be made only through theoretically given parameters, and further manual adjustment of parameters may be required later, which undoubtedly greatly increases the workload. On the other hand, The lenses of some VR head-mounted display devices are provided by third-party optical manufacturers, and the detailed structural parameters of the lenses may not be provided due to commercial confidentiality, which brings difficulties to developers in theoretical modeling

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