Vision calibration targets are precision test samples or patterns that are printed or etched on a substrate of glass or other material for dimensional calibration and depth-of-field determinations of machine vision systems, cameras, or microscopes. Vision calibration targets are used to measure various machine vision system field parameters, such as magnification, distortion, and anamorphism, which is the distortion of an image in a specific way so that it is only visible when viewed under specific circumstances.
Vision calibration targets include different designs to test different machines. Machine vision calibration is done with round dot pattern targets and chrome-on-glass reticules, or grids. These grids are used to inspect and calibrate laser image setting equipment, clinical instruments, and semiconductor processing systems. Round dot pattern vision calibration targets are less sensitive to the limitations of resolution and provide effective measurements. Reticles are high contrast targets that are either back- or front-lit, which makes them useful in all kinds of microscopy applications. Calibrating visions systems is vital to maintaining the quality of images and may reveal problems with different components of the machine vision system, such as resolution or the depth field.
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Computer Vision Source Code Gandalf - Gandalf is a computer vision and numerical algorithm library, written in C, which allows you to develop new applications that will be |
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National Physical Laboratory About NPL Vision & Mission People Annual Review Products + Services Calibration + Testing Consultancy |
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Citations: Camera Calibration of a Head-Eye System for Active... M. Li, Camera Calibration of a Head-Eye System for Active Vision Proc. |
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