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Study on Pixel Matched Volume Holographic Storage System with Magnification Error

Author: LiuJingJing
Tutor: HeShuRong
School: Tsinghua University
Course: Optical Engineering
Keywords: Volume holographic storage Bit Error Rate Pixel matching Magnification compensation CMOS image sensor
CLC: TP333
Type: Master's thesis
Year: 2005
Downloads: 72
Quote: 1
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Abstract


Volume holographic data storage compared with other technologies, has a large storage capacity, fast data transfer rate, seek time, so the next-generation storage technology trends, become the main research direction of the research institutes at home and abroad. Volume holographic storage as an optical storage technology, the system error rate is an important indicator to measure its performance advantages and disadvantages. The latest research shows that of the related fields, not strictly 1:1 match between the pixels of the volume holographic data storage system input - output devices will bring serious crosstalk noise is the main reason for the high error rate. In general, the pixels of the input and output devices in volume holographic system can achieve by changing the material of the optical system as a multiple of one-to-one pixel match. However, the actual image reconstruction process, there are many factors affecting the matching of the pixels, such as the error of the mechanical displacement of the optical components within the system, the design of the optical assembly and process error, the magnification of the optical imaging errors and the storage medium contraction errors caused. To read out the match better image quality, we propose a novel image processing methods, to compensate for a variety of errors. The main contents include: 1. Analysis of factors that affect the bit error rate and pixel matching method to reduce the error rate of a comparative study to determine the lower bit error rate and improve the pixel matching quality direction. (2) to reduce the original image bit error rate target to analyze the nature of the image compensation algorithm, image shift compensation algorithm for learning and development is derived the magnification compensation algorithm beings like multiple error case, and finally summed up can be used to the any pixel mismatch compensation algorithm in the case. Two means through computer simulation and experimental analysis and validation the magnification compensation algorithm was like a multiple of the error and suggest improvements direction. Play the advantages of volume holographic data storage transfer rate, design and production of the new CMOS image readout system, CMOS image sensors to achieve a high-speed output of the image, and provides a reference for system miniaturization and high-speed FPGA control. The paper not only a comprehensive summary of the conventional volume holographic data storage pixel matching method, and innovative The image processing method that is conducive to reducing the bit error rate and optical design ideas, practical meaningful volume holographic storage system . In addition, the paper also vision and recommendations for follow-up work.

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Electronic digital computer (not a continuous role in computer ) > Memory
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