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Implementing Optical Wavelet Filter Based on 4F System

Author: ZuoHongXiu
Tutor: TaoChunKuang
School: Chongqing University
Course: Optical Engineering
Keywords: Optical filter Wavelet Transform 4F system Diaphragm Tensor product
CLC: TP391.41
Type: Master's thesis
Year: 2011
Downloads: 45
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Abstract


Since photons with excellent parallelism, large capacity, high-speed and other incomparable superiority , optical information processing to become a hot topic in today's scientific research , optical wavelet transform in image compression field of application is one of them , in the field of image compression , the introduction of optical wavelet transform to overcome the high pure computation problem optics and the many advantages of wavelet transform , the image data compression provides an effective way. This paper describes the development of wavelet transform and the basic theory of dynamic analysis of a typical optical information processing systems theory and spatial frequency characteristics , we propose a system for optical 4F optical wavelet filter design and production methods. The space of the optical frequency characteristics 4F . From the basic theory of Fourier optics , optical 4F system theory and elaborate spatial frequency characteristics of the device characteristics and the input image sampling energy concentration on spatial frequency characteristics of the image , the image size of the image reconstruction and the corresponding relationships through optical experiments and theoretical analysis showed that the surface of the spectrum , the image of the spatial filter range determines whether the precise reconstruction of the image , while the optical wavelet transform spatial filtering optical transmission range but also by the sampling device 4F system features, system noise, input image size, the image frequency domain degree of energy concentration . Research Optical Wavelet filter design and implementation, as well as the choice of wavelet wavelet filter to achieve impact in the analysis of optical wavelet transform systems , based on the study of the physical form of the optical wavelet filter through simulation and optical experiments , the design of the optical wavelet filter , reconstruct the original image , although the accuracy to be improved, however , which further promoted the optical wavelet transform image data real-time compression for fast image transfer basis. Finally , a brief analysis of the optical wavelet filter error , error sources and improvement given direction .

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Pattern Recognition and devices > Image recognition device
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