OpenCV Checkerboard Standard Parameters Table
| Specification and model |
ZX12*9-1mm |
| Pattern size (mm) |
12*9mm |
| Grid edge length (mm) |
1mm |
| Number of grids |
12*9個 |
| material quality |
Glass |
| Precision (mm) |
±0.001mm |
| thickness |
2.3mm |
How to select calibration boards
Choose an appropriate calibration board based on the size of the field of view, usually selecting half or one-third of the field of view. The so-called field of view has many concepts: camera field of view (which is built-in in camera parameters and usually does not require us to calculate it ourselves); Calibrate field of view (object field of view, which can be understood as the field of view we refer to)
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Material differentiation
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advantage
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shortcoming
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ceramics
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The advantages of ceramic calibration plates are non reflective and high contrast
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Due to material limitations, the pattern is ≤ 200 * 200mm, and the material is expensive, making it difficult to process with high precision and resulting in a high scrap rate
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glass
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The advantages of glass calibration plates are that they can process high-precision patterns with a surface width of 690 * 590mm, with high precision. The processing technology is relatively mature compared to ceramics, and the price is cost-effective
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Reflective and fragile
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