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An Image Coding Method Based on Block Compressive Sensing

A block compression sensing and image coding technology, applied in image communication, digital video signal modification, electrical components, etc., can solve problems such as strong randomness, difficulty in practical application, and complex structure of measurement matrix generator, and achieve reconstruction speed Fast, high-quality reconstruction, and less data volume

Active Publication Date: 2018-06-15
FUZHOU UNIV
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Problems solved by technology

However, the construction of the measurement matrix through dictionary training takes a long time, and the construction of the measurement matrix generator based on the regression model is complex and random, which is not easy to be practical

Method used

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  • An Image Coding Method Based on Block Compressive Sensing
  • An Image Coding Method Based on Block Compressive Sensing
  • An Image Coding Method Based on Block Compressive Sensing

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Embodiment Construction

[0043] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0044] Such as figure 1 As shown, this embodiment provides an image coding method based on block compression sensing, which specifically includes the following steps:

[0045] Step S1: Design a measurement matrix according to the size of the image block and the number of measurements;

[0046] Step S2: Design the quantization digits, and obtain the quantization digits matrix of the measured values ​​of the image block;

[0047] Step S3: using the measurement matrix in step S1 and the number of quantization bits in step S2 to encode the image to obtain a bit stream;

[0048] Step S4: Decode the bit stream obtained in step S3 to obtain a reconstructed image.

[0049] In this embodiment, the block size of the image is ,Such as figure 2 As shown, each pixel and its DCT coefficients (such as image 3 shown) is 8 bits.

[0050] In this embodiment, th...

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Abstract

The invention relates to a BCS (Block Compressive Sensing)-based image coding method. The method comprises the following steps: first, designing a measurement matrix according to the sizes and measurements of image blocks; then, designing digitalized bits to obtain a digitalized bit matrix of the measurements of the image blocks; and then coding the image by using the measurement matrix and the digitalized bits to obtain a bit stream; and finally decoding the bit stream to obtain a reconstructed image. The method has the advantages of further improving the compression ratio of the image, simplifying the coding process and improving the reconstruction performance while considering the quality, speed and practicability of coding.

Description

technical field [0001] The invention relates to the technical field of digital image and digital video compression coding, in particular to an image coding method based on block compression perception. Background technique [0002] Because traditional image coding requires full sampling and recompression, the encoding end requires a large storage space and high complexity, which induces the proposal and development of compressed sensing theory, which can accurately restore the original image from a linear projection lower than the Nyquist rate. Signal. As an application of two-dimensional images, Block Compressive Sensing (BCS) can greatly reduce the sampling burden, but it also faces the challenges that the random sampling operation requires a huge storage space and the reconstruction process consumes a huge amount of computation. [0003] Because the smooth Landweber projection (SPL) algorithm can quickly realize the compressed sensing reconstruction, and at the same time...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/129H04N19/132H04N19/124H04N19/625H04N19/147
Inventor 陈建苏凯雄朱宇耀吴林煌
Owner FUZHOU UNIV
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