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Image Retrieval Based on Adaptive Semi-Hilbert Curve

Author: SongKun
Tutor: ChengXiaoPing
School: Southwestern University
Course: Applied Computer Technology
Keywords: Content-based image retrieval The adaptive准希尔伯特curve Discrete cosine transform coefficients
CLC: TP391.3
Type: Master's thesis
Year: 2006
Downloads: 82
Quote: 1
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Abstract


Content-based image retrieval technology features extraction techniques were studied , and a based image retrieval adaptive准希尔伯特curve method . This method first the adaptive准希尔伯特curve to scan the image , the digital image into a one-dimensional discrete signal from the two - dimensional discrete signal to a discrete cosine transform , and then on the scanning of the one-dimensional signal , to take the number of located on the front the discrete cosine transform coefficient as the feature vectors , on this basis, to achieve rapid retrieval . The main work and contributions of the thesis - 1 for the standard Hilbert curve can only fill the weakness of the phalanx of specific size proposed an adaptive准希尔伯特curve . Adaptive pseudo Hilbert curve not only has all the advantages of the standard Hilbert curve , but also can be filled with any lattice size , to break through the limitations on the application of the standard Hilbert curve . 2 the adaptive准希尔伯特curve used in the field of image retrieval - First adaptive准希尔伯特curve image scan images from two-dimensional discrete signal into a one-dimensional discrete signals , and then scan the resulting one-dimensional signal is discrete cosine transform, to take a number of discrete cosine transform coefficients located in front as the feature vectors , on this basis, to achieve a rapid retrieval . 3 . Experimental analysis in image retrieval based adaptive准希尔伯特curve method , the number of quantization levels and the discrete cosine transform coefficients of the number of search results . 4. Based adaptive准希尔伯特curve retrieval method and a global color histogram - based retrieval methods are compared, both spent in search time is almost the same , but the retrieval results of the former than the latter improved. 5 Design and to achieve experimental retrieval system based on a simple the adaptive准希尔伯特curve .

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Retrieval machine
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