https://wiki.yanding.com/ 2026-08-24T00:00:59+00:00 https://wiki.yanding.com/ https://wiki.yanding.com/lib/tpl/myconfluence/images/favicon.ico text/html 2026-07-10T08:03:28+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.yanding.com/doku.php?id=en:yanding:image_quality_evaluation:test_cases:cms_test_cases:cms_color_reproduction&rev=1783670608&do=diff FIXME This page is not fully translated, yet. Please help completing the translation. (remove this paragraph once the translation is finished) CMS Color Reproduction Concept CMS Color Reproduction refers to the ability of the Camera Monitor System (CMS) to accurately reproduce the colors of the original scene on the in-vehicle monitor after capturing the scene information around the vehicle via external cameras, followed by image processing and transmission. It encompasses the precise repr… text/html 2026-07-23T11:59:45+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.yanding.com/doku.php?id=en:yanding:image_quality_evaluation:test_cases:camera_test_cases:color_reproduction&rev=1784807985&do=diff FIXME This page is not fully translated, yet. Please help completing the translation. (remove this paragraph once the translation is finished) Color Reproduction 1. Definition of Color Reproduction Color reproduction refers to the process by which color film reproduces the colors of a photographic image to closely match the original object through shooting and printing. In digital cameras, it refers to the ability to restore the colors of a photographic image through data processing and co… text/html 2026-07-24T07:49:48+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.yanding.com/doku.php?id=en:test_cases&rev=1784879388&do=diff Test Cases This section provides practical test cases for image quality evaluation, organized by application: * Camera Test Cases * Image Quality Evaluation Overview * Dynamic Range * Noise * Sharpness * White Balance * Distortion * Uniformity * Color Reproduction * Chromatic Aberration * Field of View * Exposure Time * Frame Rate * Glare * Spatial Frequency Response (SFR) * Texture Loss * Gray Scale Response * Image Stabilization * MTF/S… text/html 2026-07-10T08:03:35+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.yanding.com/doku.php?id=en:yanding:image_quality_evaluation:standardized_testing:iso_16505_cms_color_reproduction&rev=1783670615&do=diff FIXME This page is not fully translated, yet. Please help completing the translation. (remove this paragraph once the translation is finished) ISO 16505: CMS Color Reproduction Test Color reproduction (Colour rendering) refers to the ability of a Camera Monitor System ($(u'_r, v'_r)$$(u'_{it}, v'_{it})$$(\Delta u' = u'_{it} - u'_r, \Delta v' = v'_{it} - v'_r)$$\theta_{icolor}$$\left( (u'_{it} - u'_r) \geq 0 \text{ and } (v'_{it} - v'_r) \geq 0 \right): \theta_{icolor} = \arctan\left( \frac{… text/html 2026-08-21T14:40:26+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.yanding.com/doku.php?id=wiki:langswitch_map&rev=1787323226&do=diff  Language Switch Map 维护说明： * 第一列是中文页面ID * 第二列是英文页面ID * 只改表格，不要改格式 * 新增映射时一行一条 中文页ID 英文页ID yanding:成像基础知识:光学:几何光学:主光线角 text/html 2026-07-10T08:03:32+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.yanding.com/doku.php?id=en:yanding:image_quality_evaluation:standardized_testing:ieee_2020_2024_cpi&rev=1783670612&do=diff FIXME This page is not fully translated, yet. Please help completing the translation. (remove this paragraph once the translation is finished) IEEE 2020-2024 CPI Test Definition of CPI Contrast is a crucial fundamental condition for distinguishing objects from their surroundings. $(L_{in})$$(L_{in})=(L_{max}+L_{min})/2$$L_{in}$$L_{max}$$L_{min}$$L_{max}$$L_{min}$$C_{W}$$C_{M}$$C_{W}=\frac{L_{max}}{L_{min}}-1$$C_{W}$$L_{max}$$L_{min}$$C_{W}$$L_{min}$$C_{M}=\frac{L_{max}-L_{min}}{L_{max}+L_{… text/html 2026-07-10T08:02:43+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.yanding.com/doku.php?id=en:yanding:imaging_basics:optics:colorimetry:cri_ra_vs_ri&rev=1783670563&do=diff FIXME This page is not fully translated, yet. Please help completing the translation. (remove this paragraph once the translation is finished) Difference Between Color Rendering Index Ra and Ri In fields such as lighting design, color management, and image creation, the color rendering index is a core metric for evaluating a light source's ability to reproduce object colors. $$R_i = 100 - 4.6 \Delta E$$$ \Delta E_i$$ \Delta E_i$$R_{i}$$$Ra =\frac{(R₁+R₂+R₃+R₄+R₅+R₆+R₇+R₈)}{8}$$… text/html 2026-07-10T08:02:43+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.yanding.com/doku.php?id=en:yanding:imaging_basics:optics:colorimetry:color_gamut&rev=1783670563&do=diff FIXME This page is not fully translated, yet. Please help completing the translation. (remove this paragraph once the translation is finished) Do Digital Cameras Have a Color Gamut? With the increasingly widespread application of digital images, the colorimetric term text/html 2026-07-23T11:59:46+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.yanding.com/doku.php?id=en:yanding:image_quality_evaluation:test_cases:camera_test_cases:image_quality_evaluation&rev=1784807986&do=diff FIXME This page is not fully translated, yet. Please help completing the translation. (remove this paragraph once the translation is finished) Image Quality Assessment Overview Image Quality Assessment (IQA) refers to the subjective and objective analysis and evaluation of the imaging performance (such as resolution, noise, distortion, color, dynamic range, etc.) of an imaging system under given conditions (such as the captured scene, lighting environment, and display device input of a cam… text/html 2026-07-10T08:03:24+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.yanding.com/doku.php?id=en:yanding:image_quality_evaluation:test_cases:cms_test_cases:cms_luminance_contrast_reproduction&rev=1783670604&do=diff FIXME This page is not fully translated, yet. Please help completing the translation. (remove this paragraph once the translation is finished) CMS Luminance and Contrast Reproduction Definition: The CMS luminance and contrast reproduction test simulates the lighting challenges of real-world driving environments to verify the $L_{High}$$L_{Low}$$CR = \frac{L_{monitor/chart/white/ambient}}{L_{monitor/chart/black/ambient}}$ text/html 2026-07-10T08:03:05+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.yanding.com/doku.php?id=en:yanding:image_quality_evaluation:tools:light_sources:multispectral_light_box&rev=1783670585&do=diff FIXME This page is not fully translated, yet. Please help completing the translation. (remove this paragraph once the translation is finished) Multispectral Light Booth — Setting a New Standard for Optical Testing Accuracy, Providing Precise "Calibration" Answers for Every Ray of Light text/html 2026-08-19T03:34:37+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=1787110477&do=diff How to Choose the Right Test Chart? In image quality evaluation (e.g., for cameras, LiDAR, etc.), test charts are standardized and reproducible core tools—they translate “subjective visual perception” into “objective data metrics.” This article starts from basic concepts, breaking down the purposes, parameters, and selection logic of test charts, as well as chart materials, mounting, usage, and storage, to help you precisely match testing requirements and use test charts correctly.$tan\frac{DFO… text/html 2026-07-24T07:49:20+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.yanding.com/doku.php?id=en:yanding:image_quality_evaluation:standardized_testing&rev=1784879360&do=diff Standardized Testing This section covers standardized testing methods for image quality evaluation, including: * ISO 12233 SFR Testing * ISO 15739 Noise Testing * ISO 16505 CMS Depth of Field Testing * ISO 16505 CMS Color Reproduction Testing * ISO 17850 Distortion Testing * ISO 17957 Shading Testing * ISO 18844 Flare Testing * EMVA 1288 * IEEE 2020-2024 CPI Testing * IEEE 2020-2024 Flare Testing * IEEE 2020-2024 Flicker Testing * GB 15084-2022 CMS * GB/T 43249-2023 P… text/html 2026-07-10T08:03:37+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.yanding.com/doku.php?id=en:yanding:image_quality_evaluation:standardized_testing:qc_t_1128_2019&rev=1783670617&do=diff FIXME This page is not fully translated, yet. Please help completing the translation. (remove this paragraph once the translation is finished) Image Solutions for "QC/T 1128-2019: Automotive Cameras" Overview “QC/T 1128-2019: Automotive Cameras$\text{SNR (dB)} = 20\log_{10}\left(\frac{\text{Si}}{\text{Ni}}\right)$${Si}$\( i \)${Ni}$\( i \)$$\text{DR} = 20 \left( D_{\text{SNR}=1} - D_{\text{SNR}=\text{MAX}} \right)$$$D_{\text{SNR}=1}$$D_{\text{SNR}=\text{MAX}}$$t_{on}$$t_{SL}$$$\theta_{\tex… text/html 2026-07-10T08:03:14+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.yanding.com/doku.php?id=en:yanding:image_quality_evaluation:test_cases:adas_test_cases:contrast_performance_index_cpi&rev=1783670594&do=diff FIXME This page is not fully translated, yet. Please help completing the translation. (remove this paragraph once the translation is finished) Contrast Performance Indicators (CPI) 1. Concept of Contrast Performance Indicators (CPI) Contrast is a crucial fundamental condition for distinguishing objects from their surroundings. Contrast Performance Indicators (CPI) are used to evaluate the contrast reproduction capability of an imaging system and are mainly divided into two types: Contrast … text/html 2026-07-23T11:59:46+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.yanding.com/doku.php?id=en:yanding:image_quality_evaluation:test_cases:camera_test_cases:white_balance&rev=1784807986&do=diff FIXME This page is not fully translated, yet. Please help completing the translation. (remove this paragraph once the translation is finished) White Balance The environment we live in is vibrant and colorful, featuring a red umbrella, a yellow beach chair, or a clear blue sky. White balance is utilized in cameras to ensure accurate color reproduction of subjects during capture. In addition to automatic color adjustment, semi-automatic and manual adjustments are also available. text/html 2026-07-10T08:03:27+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.yanding.com/doku.php?id=en:yanding:image_quality_evaluation:test_cases:cms_test_cases:cms_gray_level_reproduction&rev=1783670607&do=diff FIXME This page is not fully translated, yet. Please help completing the translation. (remove this paragraph once the translation is finished) CMS Gray Scale Reproduction Test Method: Display the gray scale test chart on the monitor, measure the luminance of each gray patch displayed on the monitor, calculate the lightness of each gray patch according to Formula (1), and then calculate the lightness difference between adjacent gray patches according to Formula (2). The requirement is that … 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 2026-07-10T08:02:42+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.yanding.com/doku.php?id=en:yanding:imaging_basics:optics:colorimetry:color_rendering&rev=1783670562&do=diff FIXME This page is not fully translated, yet. Please help completing the translation. (remove this paragraph once the translation is finished) Color Rendering I. What is Color Rendering Color rendering refers to the ability of a light source to reproduce the true colors of objects compared to a standard light source (i.e., the degree of color fidelity of the objects). The standard light source is based on the CIE (International Commission on Illumination) standard illuminants, with natura… text/html 2026-07-15T12:13:13+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.yanding.com/doku.php?id=en:keywords&rev=1784117593&do=diff dynamic range/color reproduction/spatial frequency response/uniformity/distortion/flare/flicker/CMS/test charts text/html 2026-07-24T05:20:27+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.yanding.com/doku.php?id=en:yanding:optics_basics&rev=1784870427&do=diff Optics Covering key areas such as geometric optics, colorimetry, radiation and luminescence, radiometry and photometry, providing theoretical support for imaging principles. geometric_optics colorimetry radiation_and_luminescence radiometry_photometry Geometric Optics Colorimetry Radiation and Luminescence Radiometry and Photometry Geometric Optics Geometric optics uses light rays as an abstract model to describe the laws of light propagation, ignoring wave effects of… text/html 2026-07-28T07:26:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.yanding.com/doku.php?id=en:yanding:image_quality_evaluation:image_quality_factors:uniformity_shading&rev=1785223561&do=diff Shading I.Concept Shading comprises luminance shading and color shading. * Luminance shading refers to the uneven distribution of brightness from the center to the edges of an image (Figure 1). * Color shading refers to the inconsistent color reproduction from the center to the edges of an image (Figure 2).$\theta$$\theta$$\cos^4\theta$ text/html 2026-07-23T11:59:46+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.yanding.com/doku.php?id=en:yanding:image_quality_evaluation:test_cases:camera_test_cases:sfr&rev=1784807986&do=diff FIXME This page is not fully translated, yet. Please help completing the translation. (remove this paragraph once the translation is finished) Spatial Frequency Response (SFR) 1. Concept of Spatial Frequency Response Spatial Frequency Response ( text/html 2026-07-23T11:59:47+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.yanding.com/doku.php?id=en:yanding:image_quality_evaluation:test_cases:camera_test_cases:uniformity&rev=1784807987&do=diff FIXME This page is not fully translated, yet. Please help completing the translation. (remove this paragraph once the translation is finished) Uniformity I. Concept of Uniformity Uniformity encompasses image luminance uniformity and image color uniformity. text/html 2026-07-10T08:02:42+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.yanding.com/doku.php?id=en:yanding:imaging_basics:optics:colorimetry:metamerism&rev=1783670562&do=diff FIXME This page is not fully translated, yet. Please help completing the translation. (remove this paragraph once the translation is finished) Is Metamerism Far Removed from Our Daily Lives? Metamerism is a colorimetric term used to describe the phenomenon where color stimuli with different spectral compositions produce the same color perception (i.e., have the same tristimulus values). The English word for this is