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Wei Xu

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Proceedings Article | 1 August 2023 Paper

Research on multidirectional wavelet transform in optical measurement

Suzhou Zhu, Changyu Zeng, Wei Xu, Qingsheng Zhu

Proceedings Volume 12747, 127470Q (2023) https://doi.org/10.1117/12.2689177

KEYWORDS: Image processing, Edge detection, Wavelet transforms, Matrices, Detection and tracking algorithms, Optical testing, Image processing software

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Traditional focal length measurement is usually limited to small-aperture optical systems, and relies on human visual judgment to have subjective errors. In contrast, the digital optical parameter testing software system is based on modern equipment, such as a large-area CCD camera, a motor-driven precision translation stage, a large-diameter high-quality collimator, and a high-precision three-dimensional turntable. High-precision measuring system. The test system uses the magnification method, based on the sharpness evaluation function, the variable step length climbing focusing search algorithm, and the Mexican hat multi-directional wavelet transform function image edge detection processing algorithm to achieve focal length measurement, improve the accuracy and efficiency of parameter measurement, and also Complete the framework construction for the follow-up optical parameter comprehensive test system.

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