Two-dimensional affine transformation full-gloss implementation method based on diffraction device array
A diffractive device and two-dimensional affine technology, applied in the field of image processing, can solve the problem that two-dimensional affine transformation cannot be directly applied, and achieve the effect of suppressing interference and fast response.
Inactive Publication Date: 2014-03-26
CHONGQING UNIV
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[0008] The purpose of the present invention is to provide an image processing technology that can be used to realize two-dimensional affine linear transformation in an all-optical way in view of the above-mentioned shortcomings in the existing optical exchange method that cannot be directly applied to two-dimensional affine transformation
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[0034] The specific implementation manner and working principle of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0035] Such as figure 1 , figure 2 As shown, a two-dimensional affine transformation all-optical realization method based on a diffraction device array is carried out according to the following steps:
[0036] Step 1: Collimate the coherent light generated by the laser source and project it into the first spatial light modulator 4, and load the input image through the first spatial light modulator 4; the laser source here is a helium-neon laser 1, and the helium-neon laser The coherent light emitted by the neon laser 1 is collimated through a pinhole filter 2 and a collimating lens 3 .
[0037] Step 2: The first spatial light modulator 4 outputs the coherent light loaded with the input image to the affine linear transformation module;
[0038] Step 3: After performing two-dimensional affine trans...
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The invention discloses a two-dimensional affine transformation full-gloss implementation method based on a diffraction device array. The two-dimensional affine transformation full-gloss implementation method based on the diffraction device array is characterized in that a first spatial light modulator is used for loading an input image, an affine linear transformation module based on the diffraction device array is used for two-dimensional affine transformation, and then a transmittance control module is used for realizing amplitude adjustment. The two-dimensional affine transformation full-gloss implementation method based on the diffraction device array has the advantages that input mapping and output mapping can be completed in a full-gloss mode, so that two-dimensional affine linear transformation of the image is realized; the responding speed is high, and large-scale integration can be realized; due to the additional arrangement of the transmittance control module, interference from other channels can be suppressed under the condition that a useful signal amplitude on an output surface does not change.
Description
technical field [0001] The invention relates to a technology for image processing based on the idea of optical exchange, in particular, a two-dimensional affine transformation all-optical realization method based on a diffraction device array. Background technique [0002] With the development of modern image processing technology, people have higher and higher requirements for image resolution, and the pixels of digital cameras on the market have reached more than 10 million. If the computer fractal iterative system (IFS) is used to realize image data compression, the amount of computation for encoding and decoding is astonishing. Take the decoding of a 1000×1000-pixel image as an example. To achieve the resolution of 1 pixel, it takes about 1010 years to use ordinary calculation methods. This is the main bottleneck of fractal image data compression that still cannot achieve real-time processing. . [0003] If a closed-loop plenoptic system is used to calculate the frac...
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Inventor 田逢春陈丹昱赵贞贞韩亮张文理胡又文上官晓配刘颖张丽
Owner CHONGQING UNIV