the translation is finished) //
==== ISO 17850: Distortion Test ====
**Overview**\\
This International Standard specifies the test methods for geometric distortion of digital cameras.
**Standard:**
[[https://www.... 2015]]
Photography — Digital cameras — Geometric distortion (GD) measurements\\
Technical Committee:
[[https... phy]]
**Terms and Definitions**\\
**1. Geometric distortion <for Digital Still Cameras (DSC)>**
Displacement
agraph once the translation is finished) //
==== Distortion ====
**1. What is Distortion?**\\
**Distortion** refers to the geometric distortion of the image formed by an optical system relative to the object itself.
==== Distortion ====
**I.Definition**\\
Distortion is a geometric aberration characterized by the bending of straight lines i... I.Types**\\
Based on variations in magnification, distortion is primarily classified into the following three types:
* **Pincushion distortion:** Also known as positive distortion. It is chara
the translation is finished) //
==== RIQA-Camera Distortion Module ====
Distortion is a geometric aberration in optical systems (such as lenses) where the magnification ... becoming curved). This module supports automatic distortion analysis for **dot charts** and **checkerboard charts**.
**Test Charts Supported by the Distortion Module**\\
| Dot | Checkerboard | Concentri
e translation is finished) //
==== CMS Geometric Distortion ====
**Concept**\\
In the [[yanding:成像质量评价:测试用例:c... onitor System (CMS)]], [[yanding:成像质量评价:图像质量指标:畸变_distortion|distortion]] refers to the deviation of the imaging result from the ideal projection model, and its definitio... is mainly divided into two categories:\\
* **TV Distortion**: Characterizes the overall curvature of the ima
nder Test (DUT), core metrics such as resolution, distortion, color reproduction, and noise can be quantitativ... ing extremely high dynamic range testing. |
| **Distortion** | {{ :yanding:成像质量评价:工具:图卡:畸变1.png? |}} |Us... valuate the lateral chromatic aberration, SMIA TV distortion, and FOV of the imaging system;\\ \\ **Common quantitative metrics:** Distortion SMIA (%), LCA (lateral chromatic aberration), etc
d by shake in video frames; and second, the image distortion that may occur during the video stabilization pro... | Horizontal(Maximum) | The maximum horizontal distortion across all frame data |
| Vertical(Maximum) | The maximum vertical distortion across all frame data |
| Shear(Maximum) | Th... Std Dev) | The standard deviation of horizontal distortion across all frame data |
| Vertical(Std Dev) |
t only lateral chromatic aberration (CA) but also distortion.\\
**4.1 Equipment Selection**\\
{{ yanding:屏幕截... RIQA image quality testing software, click on the distortion test item, and select the dot chart test or check... utomatically analyze the chromatic aberration and distortion. The results are shown in the figure below.\\
{{... multiple test items, such as LCA test results and distortion test results, LCA curves, effect diagrams, etc.,
e imaging performance (such as resolution, noise, distortion, color, dynamic range, etc.) of an imaging system... as [[yanding:成像质量评价:测试用例:camera测试用例:畸变|geometric distortion]] (lens barrel / pincushion distortion), [[yanding:成像质量评价:测试用例:camera测试用例:动态范围|dynamic range]] (ability to re... for measuring [[yanding:成像质量评价:测试用例:camera测试用例:畸变|distortion]]), etc. Chart types are divided into transmissiv
光雷达:角分辨率5.png?400 |}} |
^ Figure 4: Point cloud distortion caused by insufficient accuracy ^
As shown in ... exhibits obvious interleaved arrangement and edge distortion, and the originally smooth road edge presents a j... y: insufficient accuracy will lead to point cloud distortion and reduce the perception accuracy of autonomous ... researchgate.net/figure/An-example-of-point-cloud-distortion-correction-a-The-point-cloud-before-correction_fi
iso_17850_distortion @en:yanding:image_quality_evaluation:standardized_testing
