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Method for testing definition of moving images of display devices

A moving image and display device technology, applied in image communication, television, electrical components, etc., can solve problems such as inconsistency in definition evaluation parameters

Inactive Publication Date: 2011-03-30
中国电子技术标准化研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0024] The object of the present invention is to provide a method for testing the clarity of moving images of display devices, which can simultaneously consider the characteristics of time domain and space domain of the human eye, and the test results are more accurate; moreover, it solves the problem of evaluating the clarity of moving images and static images The problem of inconsistent parameters

Method used

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  • Method for testing definition of moving images of display devices
  • Method for testing definition of moving images of display devices
  • Method for testing definition of moving images of display devices

Examples

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Embodiment

[0076] Implementation example in time-frequency domain: first transform pixel data from Fourier to frequency domain, multiply by filter function, and then inverse Fourier transform back to time domain to obtain pixel array R1(i, j) after time domain filtering.

[0077] R 1 (i, j) = F -1 (F(R(i,j))·T(j))

[0078] In the above formula, F is the Fourier transform, and F -1 is the inverse Fourier transform, and T is the time-domain filter function.

[0079] Time-domain implementation example: Convolute pixel data with a time-domain filter function for direct filtering.

[0080] R 1 ( i , j ) = R ( i , j ) ⊗ W ( j )

[0081] In the above formula, W is the time domain filter function.

[0082] Step 33: Spatial filtering.

[0083] Ta...

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Abstract

The invention provides a method for testing definition of moving images of display devices, comprising the following steps: A: using a high speed camera to continuously shoot and record moving test strips of display elements or the display devices; B: carrying out moving tracking pretreatment, aligning the images of a plurality of continuous frames in a mode of unchanging relative position or alignment moving centre according to the moving tracking effect of human vision, and taking out brightness and chroma data of pixel coordinates with unchanging relative positions; C: carrying out time-domain filtering on the taken brightness and chroma data of the pixel coordinates with unchanging relative positions; and D: selecting a test image after time-domain filtering, taking out the brightnessand chroma data of the pixel of the domain to be analyzed, and carrying out spatial domain filtering. The test method considers time-domain characteristics and spatial domain characteristics of humaneyes simultaneously, the test result is more accurate, and the problem that evaluation parameters of definition for the moving images and static images are inconsistent is solved.

Description

technical field [0001] The invention relates to the technical field of moving image definition testing, in particular to a method for testing the moving image definition of a display device. Background technique [0002] It has become an inevitable trend for the TV industry to transition from traditional analog TV to high-definition digital TV. DLP), organic photoelectric display (OLED), etc. Due to the difference in physical realization mechanism and driving mode, there are great differences in the quality of moving images. Consumers not only require excellent static clarity, but also require display devices to have good motion image display capabilities. Display related industries need moving image sharpness testing technology. At present, there are some testing technologies at home and abroad: [0003] (1) Subjective test method [0004] The test signal generator sends out the moving image definition stripe test signal, or the tailing response time test signal, and t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N17/02
Inventor 殷玉喆胡菊萍项道才
Owner 中国电子技术标准化研究所