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Fractal and H.264-based hyper-spectral image compression method

A technology of hyperspectral image and compression method, applied in the field of hyperspectral image compression, can solve the problems of spectral redundancy and spatial redundancy.

Active Publication Date: 2014-01-08
丰县新中牧饲料有限公司
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Problems solved by technology

There is spatial redundancy in the spatial image dimension of hyperspectral image data, and there is inter-spectral redundancy in the spectral dimension

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Embodiment Construction

[0059] The method of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0060] The invention proposes a hyperspectral image compression method based on fractal and H.264. First, the hyperspectral image cube data volume is converted into a video in YUV format and sent to the encoder. For I frames of hyperspectral video, the H.264 fast intra prediction mode discrimination method based on macroblock flatness is used for intra prediction to remove the spatial correlation of hyperspectral images; for P frames of hyperspectral video, block motion estimation / Compensating fractal encoding to remove interspectral correlations in hyperspectral images. Various tree-structure blocks of P-frame coded macroblocks firstly use the MSE criterion to find the best matching block in the reference frame, determine the iterative function system coefficients of each block, and then compare the rate-distortion costs of all block division...

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Abstract

The invention provides a fractal and H.264-based hyper-spectral image compression method. The method comprises the following steps: firstly, converting a hyper-spectral image data cube into video of a YUV (Luma and Chroma) format and transmitting into a coder; performing intra-frame prediction on I frame of the hyper-spectral video by using a macro block flatness-based H.264 fast intra-frame prediction mode discrimination method to remove spatial correlation of a hyper-spectral image; performing block motion estimation / complementary fractal coding on P frame of the hyper-spectral video to remove spectral correlation of the hyper-spectral image; searching optimal matching blocks from a reference frame for various blocks of tree structures of the P frame coded macro block by an MSE (Mean Square Error) criteria, determining an iterative function system coefficient of each block, comparing the rate distortion costs of all block division modes, taking the block division mode with the least rate distortion rate as the final inter-frame coding mode, and recording a final fractal parameter; finally coding and writing residual data of the I frame and the P frame into a code stream by entropy coding CABAC after DCT (Discrete Cosine Transformation) and quantization, wherein the fractal parameter of the P frame is also subjected to CABAC entropy coding.

Description

Technical field: [0001] The invention belongs to the field of hyperspectral image compression. Aiming at the spatial correlation and interspectral correlation existing in hyperspectral images, a hyperspectral image compression method based on fractal and H.264 is proposed. The compression speed of hyperspectral images has been accelerated and the compression ratio has been improved. Background technique: [0002] Hyperspectral technology is the frontier of remote sensing technology in the 21st century and one of the focuses of today's remote sensing community. It organically combines traditional two-dimensional imaging remote sensing technology and spectral technology, and uses imaging systems to obtain spatial information of measured objects. At the same time, through the spectrometer system, the radiation of the measured object is decomposed into spectral radiation of different wavelengths, and dozens or even hundreds of continuous carrier segment information of each pixel...

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Application Information

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IPC IPC(8): H04N19/13H04N19/176H04N19/567H04N19/61
Inventor 祝世平赵冬玉
Owner 丰县新中牧饲料有限公司
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