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Detection method for parallax scope influencing comfort level of stereo image

A parallax range and stereoscopic image technology, applied in the field of image processing, can solve problems such as inapplicability to stereoscopic images, inability to be completely equivalent to comfortable parallax range, etc., and achieve the effect of accurate parallax range

Inactive Publication Date: 2015-08-19
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The parallax limit range derived from theoretical reasoning is only the parallax limit that the human eye can adapt to through adjustment, and it is not completely equivalent to the comfortable parallax range
In recent years, some studies exploring the range of comfortable parallax mostly focus on images with relatively simple structures, but in actual complex stereo images, the distribution of parallax in various parts of the image plays a different role in the comfort of the image. Therefore, these research methods cannot be applied to actual complex stereoscopic images.

Method used

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  • Detection method for parallax scope influencing comfort level of stereo image
  • Detection method for parallax scope influencing comfort level of stereo image
  • Detection method for parallax scope influencing comfort level of stereo image

Examples

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Effect test

Embodiment 1

[0042] A method for detecting the parallax range that affects the comfort of stereoscopic images, see Figure 14 , the method includes the following steps:

[0043] 101: Process the selected stereoscopic image by using the translation viewpoint method and the step-by-step approximation method to obtain a test image;

[0044]102: Calculate the vertical aggregation matching cost of the pixel through the local matching method of adaptive weight, obtain the disparity corresponding to the center pixel with the minimum vertical aggregation matching cost value, and then obtain the disparity map;

[0045] 103: Segment the disparity map, use the foreground area, background area and central area as the research area, and obtain the disparity value of each area through the connectivity detection method;

[0046] 104: Perform curve fitting on the subjective test values ​​of each test image and the parallax values ​​of each region to obtain a parallax range of a comfortable stereoscopic i...

Embodiment 2

[0059] 201: Process the selected stereoscopic image by using the translational viewpoint method and the step-by-step approximation method to obtain a test image, that is, a test sample;

[0060] According to the ITU-R BT.500 and ITU-R BT.1438 standards (these standards are well known to those skilled in the art, and the embodiment of the present invention does not limit this), the test samples are obtained through subjective testing. The stereoscopic images selected in the subjective test experiment are from the image database of the Institute of Broadband Wireless Communication and Stereo Imaging, and four of them are selected as source images (boy, family, river, and tree, see Figure 1-Figure 4 ), using the translation pixel method to study the influence of horizontal parallax on the comfort of stereoscopic images, that is, in the experiment, the left viewpoint is fixed, and the right viewpoint is moved left or right with a certain step size to produce different sizes of hor...

Embodiment 3

[0110] This method selects four source images boy, family, river and tree provided by the Institute of Broadband Wireless Communication and Stereo Imaging, such as Figure 1 to Figure 4 shown. The four images were all taken by parallel binocular cameras, and there is no vertical parallax after correction. figure 1 and figure 2 It is a plan view, all of which are figures, figure 1 Medium-depth distribution is wide, figure 2 The depth profile is shallow and concentrated. image 3 and Figure 4 They are top view and bottom view respectively, both are landscape images, and the depth distribution is wide.

[0111] This method uses the pixel translation method to generate 196 sample test charts required for the experiment. In the experiment, the left viewpoint is fixed, and the right viewpoint is moved left or right to produce different sizes of horizontal parallax, and the translated left and right viewpoints are recombined as test images. After a large number of experimen...

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Abstract

The invention discloses a detection method for parallax scope influencing the comfort level of a stereo image, wherein the method comprises the following steps: processing a selected stereo image via a translation viewpoint method and a stepwise approximation method to obtain test images; calculating vertical aggregation matching costs of pixel points via an adaptive weight local matching method to obtain a parallax corresponding to the minimum vertical aggregation matching cost of the central pixel point so as to obtain a disparity map; dividing the disparity map, using a foreground region, a background region and a central region as study regions, and obtaining a parallax value of each region via a connectivity detecting method; carrying out curve fitting for subjective testing values of each test image and the parallax values of each region to obtain a parallax scope of the comfort stereo image. In combination with attention characteristics of human eye vision, the method of the invention can be used for obtaining accurate parallax scope of the comfort stereo image, thereby meeting a plurality of requirements in a practical application.

Description

technical field [0001] The invention relates to the field of image processing, and relates to an improvement of an image quality evaluation method, in particular to a detection method of a parallax range that affects the comfort of a stereoscopic image. Background technique [0002] In recent years, the large-scale rise and application of 3D technology has brought rich visual experience to people's lives, but there are still some problems that need to be solved urgently in stereoscopic imaging technology. Watching stereoscopic images / videos for a long time can cause headaches, dizziness, eye swelling and visual fatigue to the viewers. There are many reasons for this visual discomfort, one is caused by the stereo equipment itself, and the other may be related to the content of the stereo information. Stereoscopic images contain more information than flat images, and can present more realistic scenes. Therefore, higher requirements are put forward for corresponding collection...

Claims

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Application Information

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IPC IPC(8): H04N17/00H04N13/00
Inventor 李素梅李永达朱丹侯春萍
Owner TIANJIN UNIV
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