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BSI PD IEC/TR 62977-3-2:2016

BSI PD IEC/TR 62977-3-2:2016

$142.49

Electronic display devices – Evaluation of optical characteristics. Mura

Published By Publication Date Number of Pages
BSI 2016 32
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This part of IEC 62977, which is a Technical Report, provides an optical measuring method of mura for electronic displays. It defines general measuring procedures for mura measurement and an evaluation method of electronic displays.

PDF Catalog

PDF Pages PDF Title
4 CONTENTS
6 FOREWORD
8 INTRODUCTION
9 1 Scope
2 Normative references
3 Terms and definitions
10 4 Standard measuring conditions
4.1 Standard measuring conditions
4.1.1 Standard measuring environmental conditions
4.1.2 Standard measuring darkroom conditions
4.2 Light measuring device (LMD)
11 4.3 Measuring setup
4.4 Test signal
Figures
Figure 1 – Measuring layout
Tables
Table 1 – Example of reported criteria of two-dimensional LMD
12 4.5 Measuring conditions
5 Standard evaluation method
5.1 Measurement data processing method
5.2 Measurement data processing flow
5.2.1 General
Figure 2 – Example of input signal
13 5.2.2 Median filter process
Figure 3 – Measurement data processing flow adopting the S-CIELAB model
14 5.2.3 Transformation to opponent colour space from CIE XYZ
5.2.4 Convolution with the contrast sensitivity function (CSF) of the human visual system
5.2.5 Transformation to CIE XYZ from the opponent colour space
5.2.6 Transformation to CIELAB from CIE XYZ
15 5.2.7 a* correction
5.3 Mura evaluation method
5.3.1 General
5.3.2 Lightness mura evaluation
16 Figure 4 – Concept diagram of real-space information integration
17 5.3.3 Chroma mura evaluation
Figure 5 – 3 x 3 neighbourhood domain
18 5.3.4 Mura evaluation
5.3.5 Measurement report
Table 2 – Example of measurement results for a display screen uniformity
19 6 Actual example
6.1 General
6.2 Evaluation objects
6.3 Subjective evaluation
Figure 6 – Evaluation objects in a dark room
Table 3 – ITU-R quality and impairment scales
20 6.4 Evaluation by the method indicated inthis document using apparatus
Figure 7 – CSF filter images in opponent colour space
Table 4 – Subjective evaluation results
21 6.5 Correlation between subjective evaluation and mura evaluation value
Figure 8 – Correlation of mura evaluation value and ITU-R subjective evaluation values
Table 5 – Evaluation results by apparatus
22 Annex A (informative) S-CIELAB model
A.1 General
A.2 S-CIELAB model
A.3 Spatial sensitivity function model (two-dimensional CSF model)
Figure A.1 – Flowchart of S-CIELAB calculation
23 Figure A.2 – Two-dimensional CSF model
Table A.1 – Parameters for each axis of the opponent colour space
25 Figure A.3 – Examples of the convolution of a two-dimensional CSF filter for illusion
26 Annex B (informative) Type of mura
B.1 General
B.2 Classification of mura
27 Figure B.1 – Classification of mura by forms and/or causes
28 Annex C (informative) Use case of a mura evaluation value
C.1 General
C.2 Example of a use case of a mura evaluation value
Table C.1 – Example of a use case of a mura evaluation value
Table C.2 – Example of subjects to evaluate
29 Annex D (informative) Various mura measurement methods
D.1 General
D.2 Comparison of mura evaluation standards
Table D.1 – Comparison chart of various mura measurement standards
30 Bibliography

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BSI PD IEC/TR 62977-3-2:2016
$142.49