Mixed optical wavelet conversion method based on white light and monochromatic light

Abstract

The invention relates to a hybrid optical wavelet transform method based on white light and monochromatic light, and constructs an optical wavelet filter. Firstly, the input image is passed through a monochromatic light optical wavelet transform system to realize high-pass filtering in optical wavelet transform, and the input The numerical result of the high-pass filtering of the image wavelet transform; the input image is passed through the white light optical wavelet transform system to realize the low-pass filtering in the optical wavelet transform, and the numerical result of the low-pass filtering of the input image wavelet transform is obtained; then the numerical result of the high-pass filtering is obtained The results and the numerical results of low-pass filtering are used to reconstruct the input image on the computer through the numerical algorithm of wavelet inverse transformation. The optical wavelet transform realized by this method can be applied to image compression. Compared with the traditional optical wavelet transform system based on monochromatic light, it can effectively overcome the coherent noise and speckle noise, and the quality of the image reconstructed by the optical wavelet transform realized by the system is obviously improved.

Description

technical field [0001] The present invention relates to the technical field of information optics, specifically, a hybrid optical wavelet transform method based on white light and monochromatic light and a corresponding optical wavelet filter construction method. Background technique [0002] Wavelet transform technology has good performance and has been widely used in the fields of image compression, signal processing, and image processing; however, the huge amount of calculation in its application restricts the further promotion of wavelet transform applications. Therefore, combining the optical method with the wavelet transform to form an optical wavelet transform method can greatly reduce the time spent on wavelet transform, which is of great theoretical and practical value. [0003] At present, optical wavelet transform has been used in edge extraction, feature extraction, pattern recognition and other fields, showing a good application prospect. However, the optical w...

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Problems solved by technology

[0004] The monochromatic light optical wavelet transform system has its inherent disadvantages: coherent noise and speckle noise are serious, so the result of the monochromatic light optical wavelet transform is always speckle overlapping, which is hard to be unsatisfactory, and the noise problem becomes the monochromatic light optical wavelet Serious obstacle to transformation system development

However, there is currently no construction of an optical wavelet filter that satisfies the above requirements

Therefore, numerical reconstruction cannot be performed through optical wavelet transform results, which limits the application range of optical wavelet transform techniques

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