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Method and system for evaluating resolution index in naked-eye stereoscopic display

A naked-eye stereoscopic and evaluation method technology, which is applied in stereoscopic systems, televisions, electrical components, etc., can solve the problems of impracticality and increase the difficulty of determining the minimum resolution test target

Active Publication Date: 2018-05-15
SYSU CMU SHUNDE INT JOINT RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no actual measurement data to support the accuracy of this evaluation method
Another type of research is to quantify the resolution with the help of a resolution target, but the general visual spatial frequency threshold of the human eye is 30 line pairs / degree (CPD), which is for some full HD resolution devices (FHD, 1920× 1080) or ultra-high-definition resolution (UHD, 3840×2160) or even retina resolution (Retina Display) display devices, it is impractical to rely solely on human eyes to evaluate resolution; in addition, moiré Streaks and fluctuations in brightness can cause differences in the contrast of the display device, which increases the difficulty of determining the minimum resolution test target

Method used

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  • Method and system for evaluating resolution index in naked-eye stereoscopic display
  • Method and system for evaluating resolution index in naked-eye stereoscopic display
  • Method and system for evaluating resolution index in naked-eye stereoscopic display

Examples

Experimental program
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Embodiment 1

[0040] The principle of 3D display is the principle of binocular parallax, that is, the image is divided into two channels by using a light-splitting element, so that different images are sent to different eyes, and then the brain produces a concave-convex visual effect through the fusion of the images, so there is stereo vision. The most critical element in this process is the light splitting element, which is also the biggest difference between the display in 2D mode and 3D mode. In glasses-type 3D displays, polarizers or shutter glasses are used to split light, while in naked-eye 3D displays, grating arrays or lens arrays are used to split light.

[0041] Secondly, the spectroscopic element is a linear optical system. When the object light passes through the spectroscopic element for imaging, its spatial spectrum will be modulated. The modulation behavior is as follows: the imaging contrast and phase will be modulated, and the imaging quality will be affected accordingly. ...

Embodiment 2

[0064] The evaluation method provided in Embodiment 1 can only determine whether the resolution of the naked-eye stereoscopic display device is lost in 3D mode, but cannot evaluate its actual resolution. In order to solve this technical defect, this embodiment provides another evaluation method. On the basis of the method in Embodiment 1, this method adds a step, and the specific content is as follows:

[0065] In the case that it is determined that the resolution has been lost, the evaluation method also includes the step of determining the actual resolution of the naked-eye stereoscopic display device in 3D mode, specifically shifting the determined point to the left so that it falls on the spatial frequency-contrast threshold curve On C(f), then determine the spatial frequency corresponding to this contrast, and then solve the actual resolution of the naked-eye stereoscopic display device in 3D mode according to the spatial frequency.

Embodiment 3

[0067] This embodiment further explains the quantization process through two examples.

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Abstract

The invention relates to a method of evaluating a resolution index in naked eye stereoscopic display. The method comprises the following steps: S1, the brightness of a naked eye stereoscopic display device to play a pure white picture in a 3D mode is acquired and marked as E; and the illumination L1 of the naked eye stereoscopic display device to play the pure white picture in the 3D mode and the illumination L2 when a pure black picture is played are acquired; S2, the E, the L1 and the L2 are used for building a spatial frequency-contrast threshold curve C(f); S3, the naked eye stereoscopic display device displays a tested picture in the 3D mode, the image displayed by the naked eye stereoscopic display device is photographed, the photographed image is processed, and the contrast of the photographed image is thus acquired; S4, the spatial frequency of the photographed image is solved; and S5, according to the contrast of the photographed image and the spatial frequency, a corresponding point is determined in the f-C space, and a resolution loss condition is judged through the relation between the point and the spatial frequency-contrast threshold curve C(f), wherein the resolution loss conditions are as follows: if the point is lower than the threshold curve, resolution loss happens; and if the point is higher than the threshold curve, the resolution has no loss and is unchanged.

Description

technical field [0001] The present invention relates to the field of naked-eye stereoscopic display, and more specifically, to an evaluation method and system for a resolution index in naked-eye stereoscopic display. Background technique [0002] Resolution is one of the important indicators of display device quality, which determines how finely the display device reflects image details. The high-resolution display screen and film source can bring excellent visual effects and immersive realism to the audience. For ordinary 2D displays, the resolution can be represented by the product of the sum of pixels in the horizontal direction and the sum of pixels in the vertical direction, for example, 1920×1080 or 1080P can represent the resolution of the display panel; however, for 3D display As far as devices are concerned, the resolution index is no longer simply expressed by the resolution of the display device. Because for a dual (multi) channel display device such as 3D displ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N13/122H04N13/302H04N17/00
CPCH04N13/122H04N13/302H04N17/004H04N2013/0074
Inventor 周建英何杰勇王嘉辉梁浩文
Owner SYSU CMU SHUNDE INT JOINT RES INST