https://wiki.yanding.com/ 2026-10-09T09:37:29+00:00 https://wiki.yanding.com/ https://wiki.yanding.com/lib/tpl/myconfluence/images/favicon.ico text/html 2026-07-10T08:03:07+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.yanding.com/doku.php?id=en:yanding:image_quality_evaluation:tools:test_charts:18_gray&rev=1783670587&do=diff FIXME This page is not fully translated, yet. Please help completing the translation. (remove this paragraph once the translation is finished) 18% Gray I. What is 18% Gray? 18% gray refers to a neutral gray with a light reflectance of 18%, commonly used for exposure calibration (e.g., using a gray card) and color management (e.g., custom white balance, post-production color grading reference). text/html 2026-09-29T12:20:12+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.yanding.com/doku.php?id=en:yanding:image_quality_evaluation:tools:test_charts:chart_selection_guide&rev=1790684412&do=diff Test Chart Selection Guide Test charts are standardized, reproducible tools essential for image quality evaluation (e.g., cameras, displays, LiDAR). They convert subjective visual perception into objective, quantifiable metrics. This guide reviews chart purposes, key parameters, selection criteria, materials, mounting methods, handling, and storage to support accurate matching of testing requirements and proper chart use.$\tan\frac{DFOV}{2}=\frac{D/2}{S}$$D=2S\tan\frac{DFOV}{2}$$OD = \log_{10}… text/html 2026-07-10T08:03:07+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.yanding.com/doku.php?id=en:yanding:image_quality_evaluation:tools:test_charts:material_selection_guide&rev=1783670587&do=diff FIXME This page is not fully translated, yet. Please help completing the translation. (remove this paragraph once the translation is finished) Test Chart Material Selection Guide Test charts are core tools in fields such as optical testing and imaging system evaluation. Their materials directly affect testing accuracy, service life, and applicable scenarios. Selecting the appropriate test chart material requires a comprehensive analysis of the pros and cons of various materials, taking into… text/html 2026-07-10T08:03:08+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.yanding.com/doku.php?id=en:yanding:image_quality_evaluation:tools:test_charts:usage_maintenance_storage_guide&rev=1783670588&do=diff FIXME This page is not fully translated, yet. Please help completing the translation. (remove this paragraph once the translation is finished) Guidelines for the Use, Maintenance, and Storage of Test Charts Test charts are indispensable reference tools in image quality evaluation, and their integrity directly determines the accuracy of test results. Improper use and storage environments can cause charts to fade, scratch, or deform, thereby rendering them useless for calibration.