Color single-pixel imaging method and system based on random circulant matrix

A cyclic matrix, imaging method technology, applied in color TV, color TV components, image communication, etc., can solve the problems of difficulty, waste of acquisition and compression, increased signal transmission and storage, etc., to achieve the effect of improving reconstruction ability

Active Publication Date: 2020-02-14
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional imaging devices almost all use the method of "sampling first, then compressing" to process the data obtained by the sensor, but the huge amount of data adds great difficulty to the transmission and storage of the signal, and it will also be in the process of acquisition and compression. cause a lot of waste
At the same time, traditional imaging equipment requires expensive high-speed transmission circuits and interfaces, as well as large-capacity memory to realize real-time data storage, which undoubtedly increases the cost of traditional imaging equipment.
In addition, due to the deepening of people's demand for imaging equipment, especially in some special application fields, it is difficult for traditional imaging equipment to meet people's growing needs

Method used

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  • Color single-pixel imaging method and system based on random circulant matrix
  • Color single-pixel imaging method and system based on random circulant matrix
  • Color single-pixel imaging method and system based on random circulant matrix

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Such as Figure 1-Figure 3 As shown, a color single-pixel imaging method based on random circulant matrix has the following steps:

[0062] S1. Decompose the target restoration image with a resolution of N1×N1 into several small blocks of N3×N3, and use the same measurement matrix for each small block to perform compressed sensing measurement;

[0063] S2, designing and generating the measurement matrix required by the spatial modulator in the computer, the dimension of the measurement matrix is ​​M×N2, N2=N3×N3, so that it can encode the optical signal;

[0064] S3, the measurement matrix is ​​sent to DDR2 SDRAM through FPGA;

[0065] S4, FPGA reads a row of element values ​​of the measurement matrix from DDR2 SDRAM, that is, N2 element values, and then converts these N2 element values ​​into an N3×N3 dimensional matrix, and projects it on the spatial modulator;

[0066] S5. After the spatial modulator projects the image, the FPGA receives the electrical signal gener...

Embodiment 2

[0095] Such as Figure 4 As shown, a color single-pixel imaging system based on random circular matrix, including DDR2 SDRAM installed on Discovery4100 development boards 6-1, 6-2, 6-3, onboard FPGA, spatial modulator 3, signal acquisition An optical path composed of a processing module, a signal recovery and reconstruction module, a lens and a beam splitter;

[0096] The DDR2 SDRAM is configured to store the measurement matrix sent by the FPGA;

[0097] The FPGA is configured to read the measurement matrix from the DDR2 SDRAM and project it on the spatial modulator 3; after the spatial modulator 3 projects an image, it is received in the optical path formed by the lens and the beam splitter The electrical signal generated by the silicon photodiode after amplification and filtering and A / D conversion is stored in DDR2 SDRAM; the electrical signal generated by the silicon photodiode after amplification and filtering and A / D conversion stored in DDR2 SDRAM The signal is sent to ...

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Abstract

The invention discloses a color single pixel imaging method and system based on a random cyclic matrix. The imaging system comprises a DDR2 SDRAM additionally installed on a Discovery 4100 developmentboard, an onboard FPGA, a spatial modulator, a signal acquisition and processing module, a signal recovery and reconstruction module and a light path formed by a lens and a spectroscope. A measurement matrix is used to control the spatial modulator to further code light signals, a mode of compression while sampling is adopted to process data, the advantages of the spectroscope of quick decomposition rate and good real-time performance are combined, a color single pixel imaging system is formed, the difficult problems brought by massive data in the traditional imaging device in signal transmission and storage can be solved, a block adaptive step-size gradient projection recovery algorithm is used to enable the quality of the image to be greatly enhanced, and the resolution can reach 256*256.

Description

technical field [0001] The invention belongs to the field of compressed sensing imaging, and in particular relates to a color single-pixel imaging method and system based on a random circular matrix. Background technique [0002] With the rapid progress of society and the rapid development of the field of computer vision, people's demand for high performance of imaging equipment has been greatly deepened, especially in some special application fields. Traditional imaging devices almost all use the method of "sampling first, then compressing" to process the data obtained by the sensor, but the huge amount of data adds great difficulty to the transmission and storage of the signal, and it will also be in the process of acquisition and compression. cause a lot of waste. At the same time, traditional imaging equipment requires expensive high-speed transmission circuits and interfaces, as well as large-capacity memory to realize real-time data storage, which undoubtedly increase...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/132H04N19/90H04N19/176H04N9/31
CPCH04N9/3102H04N19/132H04N19/176H04N19/90
Inventor 贾同李永强陈东岳王骥童振
Owner NORTHEASTERN UNIV LIAONING
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