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

A technology of wavelet transform and monochromatic light, applied in the field of information optics, can solve problems such as unsatisfactory optical wavelet filter, unsatisfactory results, speckle overlap, etc.

Inactive Publication Date: 2008-03-26
CHONGQING UNIV
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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

Method used

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

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Embodiment Construction

[0062] Embodiments of the present invention are described in further detail below in conjunction with the accompanying drawings:

[0063] The structure of the optical wavelet transform system based on monochromatic light is shown in Figure 2. The helium-neon laser 1 is located 10 cm in front of the pinhole filter 2, and the pinhole filter 2 is located at the front focal plane of the collimator lens 3. The collimator lens 10cm behind 3, install the first electrical addressing spatial light modulator 4, the electrical addressing spatial light modulator 4 is located at the front focal plane of the first Fourier lens 5, the back focal plane of the Fourier lens 5 is connected to the second Fourier The front focal planes of the lens 7 converge at one place, where the second electrically addressable spatial light modulator 6 is installed, and the first CCD photocoupling device 8 is installed at the back focal plane of the second Fourier lens 7 . He-Ne laser 1, pinhole filter 2, colli...

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Abstract

The invention relates to a mixing optical small wave switching method based on the white light and monochromatic light. It also contains an optical filter for small wave. Firstly it gets the high-pass filtering numerical value of small wave switch after through the monochromatic light optical filter; and it can get low-pass filtering numerical value of the inputting image through white light optical filter. Then, it bases on the high-pass filtering numerical value and low-pass filtering numerical value, according to numerical value arithmetic of small wave reverse transformation, computer will rebuilt the input image. This method of optical small wave switching can apply to image compression. Compared with other traditional optical small wave switching system which only based on monochromatic light, this can avoid cohere noise and speckle noise effectively, besides, the rebuilding image formed by this optical small wave switching system has a obvious improvement on image quality.

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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/46H04N5/21G06T9/00
Inventor 田逢春韩亮李立曾孝平冯文江唐光菊于雯辉刘赛姬艳丽
Owner CHONGQING UNIV
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