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Real-time video scaling algorithm and FPGA implementation

Author: ZhuYanLiang
Tutor: HuXiaoLong
School: Central South University
Course: Applied Computer Technology
Keywords: FPGA Image scaling Interpolation Grading bi-cubic interpolation Discrete wavelet transform
CLC: TP391.41
Type: Master's thesis
Year: 2009
Downloads: 376
Quote: 4
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Abstract


Resolution need to adjust the video image video scaling technology . If the processing speed of the image scaling technology to achieve real-time requirements can be applied to video scaling . The traditional image scaling technology uses interpolation kernel function to restore the image of the existing pixel interpolation reconstruction . This article describes the theoretical basis of image interpolation - sampling theorem , the ideal reconstruction function Sinc function are discussed . This article describes the commonly used linear image interpolation techniques and pixel fill , adaptive interpolation and wavelet domain image scaling technology . Then, the article discusses the idea of hierarchical linear interpolation algorithm , designed and implemented on the FPGA grading bicubic algorithm . Finally, the scaling results of the various algorithms are analyzed and discussed . Analysis of existing video scaling algorithm - based , hierarchical linear interpolation algorithm and apply the simplified linear interpolation algorithm . The hierarchical linear interpolation algorithm at the expense of the calculation accuracy at the expense of the lookup table instead of multiplication , reducing the complexity of the algorithm . Paper designs and implements a hierarchical bi-cubic interpolation algorithm , a detailed description of the modular structure of the on-board system . Finally, hierarchical linear interpolation algorithm is compared with the original linear interpolation algorithm renderings comparison results indicate that the hierarchical interpolation algorithm with the original algorithm error is smaller , the smaller of the magnification ratio can replace the original algorithm . FPGA implementation results prove grading bicubic linear interpolation algorithm to meet the the rated frame rate , real - time video scaling .

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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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