Real-time correction and fusion for optical distortions in head-mounted displays

Weng, Dongdong; Liu, Yue; Wang, Yongtian

doi:10.1117/12.839659

Cited by 4 publications

(7 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, in order to achieve a wide FOV and a compact structure, the current HMDs are generally equipped with the decentered or tilted components . As a result, the optical distortion of them becomes asymmetric, nonlinear, and much more complex . A simple method to correct these distortions is essential.…”

Section: Introductionmentioning

confidence: 99%

“…To offset the distortion of an HMD by optimizing the optical system can be effective in some specific cases . However, for some optical systems, such as the freeform‐surface‐prism (FFSP) system, the nonlinear distortion cannot be completely corrected by itself . A more generally applicable approach is the computational correction based on a predistortion technique.…”

Section: Introductionmentioning

confidence: 99%

“…A local mapping function, which uses sets of local patches and interpolation algorithms, can make up the inadequacy of global fitting in actuary. The optical software‐based method has also been applied for correcting the distortion in the HMDs with the FFSP, in which the predistortion image was computed from rectangular areas formed by the obtained predistortion data grid …”

Section: Introductionmentioning

confidence: 99%

“…15 As a result, the optical distortion of them becomes asymmetric, nonlinear, and much more complex. 16,17 A simple method to correct these distortions is essential.…”

Section: Introductionmentioning

confidence: 99%

“…18,19 However, for some optical systems, such as the freeformsurface-prism (FFSP) system, the nonlinear distortion cannot be completely corrected by itself. 17 A more generally applicable approach is the computational correction based on a predistortion technique. As described in the study of Robinett and Rolland,20 the distortion of an optical system can be estimated and modeled by spatial mapping functions and counteracted by a reverse displacement of the image to display; modeling the distortion mapping function for predistortion is a main issue.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Division model‐based distortion correction method for head‐mounted displays

et al. 2019

View full text Add to dashboard Cite

In this paper, we present a simple and efficient method for correcting the asymmetric and nonlinear geometrical distortion of a head‐mounted display (HMD). The method divides the object space into a number of quadratic triangular elements and applies a quadratic predistortion for each image section so that it can handle the distortion with any complex shapes caused by the decentering and tilted optics and improve the calibration accuracy. The errors introduced in the process of fabricating and assembling can also be eliminated. We investigated the use of a quadratic division model and two types of linear division models on an off‐axis HMD to correct the optical distortion. Experimental results demonstrated that the quadratic division model converged at a faster rate and produced higher accuracy over the typical linear model. The average root of mean square error (RMSE) after distortion correction was one pixel, and the maximum standard deviations in all rows and columns were 0.67 pixel and 0.57 pixel. In addition, the deformation continuity is maintained by using the quadratic element with connected midside nodes.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…15 As a result, the optical distortion of them becomes asymmetric, nonlinear, and much more complex. 16,17 A simple method to correct these distortions is essential.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Division model‐based distortion correction method for head‐mounted displays

et al. 2019

View full text Add to dashboard Cite

show abstract

46.5: Computational Correction Method for Optical Distortion in Eyewear Displays

Xue¹,

Zhang²,

Lin

et al. 2019

Symp Digest of Tech Papers

View full text Add to dashboard Cite

In this paper, we give a brief introduction of eyewear displays for virtual reality (VR) and augmented reality (AR), and present two computational methods that not only can be applied to traditional eyewear displays but systems with asymmetrical and nonlinear distortion as well. The methods combine image segmentation with linear approximation to correct the optical distortion. Through these approaches, pixel‐mapping table for generating pre‐distorted image can be established simply and quickly. The feasibility has been verified by experiments. These distortion correction methods for eyewear displays can achieve a sufficient accuracy, avoid a great deal of numerical calculations and enable real‐time correction.

show abstract