A method for designing a real-time decomposition chip for hyperspectral image mixing pixels

A technology of hyperspectral image and design method, which is applied in the field of real-time decomposition chips of hyperspectral image mixed pixels, can solve the problems of inability to complete real-time decomposition of hyperspectral image mixed pixels, and achieve parallel design, low design cost, and calculation high precision effect

Inactive Publication Date: 2011-11-30
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0005] The existing technology to decompose the mixed pixels of hyperspectral images is generally completed based on the application software designed by various operating systems. It is mainly suitable for post-processing and cannot be used to decompose the mixed pixels of hyperspectral images in real time.

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  • A method for designing a real-time decomposition chip for hyperspectral image mixing pixels
  • A method for designing a real-time decomposition chip for hyperspectral image mixing pixels
  • A method for designing a real-time decomposition chip for hyperspectral image mixing pixels

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Embodiment Construction

[0046] figure 1 The main steps of the vertex component analysis algorithm (VCA) to complete the decomposition of hyperspectral image mixed pixels are given:

[0047] 1) It is known that the observed spectrum matrix R=[r 1 , r 2 ,...,r N ], N is the number of pixels in the image, first use the singular value decomposition (SVD) to reduce the dimension of the observed spectral matrix, and transform it into the q-dimensional subspace, see the following formula

[0048] X = U q T R - - - ( 1 )

[0049] Among them, U q is a matrix consisting of the first q vectors of the left transformation matrix of SVD.

[0050] 2) Project X onto the hyperplane to obtain monomer S q :

[0051] [ Y ] : , j ...

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Abstract

The invention belongs to the field of image processing, and provides a chip that uses a field programmable gate array (FPGA) to realize real-time decomposition of hyperspectral image mixed pixels. The chip is completed by an ultra-high-speed integrated circuit hardware description language (VHDL). (1) Data input module, (2) Matrix autocorrelation calculation module, (3) Matrix singular value decomposition module, (4) Matrix pseudo-inverse calculation module, (5) Pixel projection decomposition endmember module consists of five parts. The present invention adopts the design idea of ​​SYSTEM ON CHIP, various control signals are generated inside the FPGA, so that the response speed of the whole chip is fast; it can complete the real-time processing of hyperspectral image data, and can be used for semiconductor processing, with short development cycle, low design cost, and easy research and development. low risk.

Description

technical field [0001] The invention relates to a hyperspectral image mixed pixel real-time decomposition chip and a realization method. technical background [0002] The ground reflection or emission spectrum signal obtained by the remote sensor is recorded in units of pixels. It is the synthesis of the surface material spectral signals corresponding to the pixel. The surface corresponding to each pixel in the image often contains different coverage types, and they have different spectral response characteristics. Instead, each pixel records these "heterogeneous" components with only one signal. If the pixel contains only one type, it becomes a pure pixel (pure pixel), and what it records is the spectral response characteristic or spectral signal of this type; if the pixel contains more than one type of land cover, it forms mixed pixel. What the mixed pixel records is the synthesis of the spectral response characteristics corresponding to different land cover types. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50G01S17/89G01S7/48
Inventor 谌德荣于东俊宫久路
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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