In today’s era of rapid technological advancement, machine vision has become a cornerstone technology across numerous fields, with its applications continuously expanding—particularly in scientific research and education, where its importance is growing steadily.

However, achieving precise measurement and inspection with machine vision systems hinges on high-accuracy system calibration. Industrial calibration targets—also known as calibration boards—are essential components for enhancing the precision of measurement systems.

Technical Principle and Calibration Mechanism

From a technical standpoint, camera calibration involves establishing a geometric imaging model of the camera. This is accomplished by capturing images of a flat plate featuring a pattern array with precisely known, fixed spacing. Calibration algorithms then compute the camera’s intrinsic and extrinsic parameters, ultimately enabling accurate measurement and 3D reconstruction. This precisely patterned flat plate is what we refer to as a calibration target or calibration template.

Critical Roles in Industry Applications

Industrial calibration targets play several vital roles:

Lens Distortion Correction:

Lens distortion is a major factor affecting measurement accuracy. Calibration targets enable precise computational correction of such distortions, ensuring reliable and accurate measurement data.

Pixel-to-Physical Dimension Mapping:

Establishing the conversion relationship between image pixels and real-world physical dimensions is fundamental for precision measurement. This mapping allows the machine vision system to translate pixel coordinates into actual metric values, forming the basis for subsequent analysis.

3D Spatial Correspondence:

Calibration targets help define the geometric relationship between a point on a physical object’s surface and its corresponding image point. This spatial correspondence is essential for applications like 3D reconstruction, enabling accurate establishment of world coordinate systems.

Features of Jingyi Optics’ Calibration Target

Jingyi Optics is committed to R&D and innovation in machine vision. To meet stringent industry demands for high-precision calibration, the company has launched the JY-LCC2025 industrial calibration target, which features:

Large Working Area: Dimensions of 1400 × 1200 mm to accommodate diverse measurement scenarios.

Pattern Design: Combines a chessboard grid with QR codes—enhancing calibration accuracy while facilitating camera recognition and positioning.

High-Contrast Color Scheme: Classic black-and-white design with white reflectance at 70% and black at 5%, maximizing image clarity and algorithmic input quality.

Wavelength Compatibility: Optimized for 905 nm operation, ensuring reliable performance under various lighting conditions.

Robust Substrate: Made from 3 mm thick aluminum with flatness better than 1 mm/m² and overall dimensional accuracy within ±1 mm, guaranteeing long-term stability and precision.

Integrated Support Stand: Includes a 2870 mm tall stand for easy setup and deployment.

Customization Available: Jingyi Optics offers tailored solutions to meet specific customer requirements.

The Indispensable Role of Calibration Targets

In machine vision, calibration targets are indispensable. Since lens distortion is unavoidable and user demands for measurement accuracy continue to rise, ensuring image fidelity is paramount. Only with geometrically accurate images can software algorithms deliver trustworthy results. Even the most advanced software cannot compensate for fundamentally distorted input data.

Thus, calibration targets are not merely accessories—they are foundational tools that enable real-time, accurate camera calibration. They significantly enhance the performance of precision measurement and inspection systems and are central to the entire camera calibration workflow.

Conclusion and Outlook

Jingyi Optics’ JY-LCC2025 industrial calibration target, with its superior performance and versatile functionality, provides robust support for high-precision machine vision applications. With continued innovation, Jingyi Optics is poised to further advance calibration target technology, contributing to progress across a wide range of industries.

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