High spectral image shadow detection and spectrum recovery method and device

A hyperspectral image and shadow detection technology, applied in the field of image processing, can solve problems such as affecting the accuracy of quantitative inversion, unable to detect shadows and image restoration, weakening image space and optical features, etc.

Active Publication Date: 2017-08-18
INST OF REMOTE SENSING & DIGITAL EARTH CHINESE ACADEMY OF SCI
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Problems solved by technology

[0003] However, in the quantitative inversion of hyperspectral remote sensing, the existence of hyperspectral image shadows seriously weakens the spatial and optical characteristics of the image, which directly affects the accuracy of quantitative inversion. Therefore, how to remove the influence of shadows and restore the spatial an...

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  • High spectral image shadow detection and spectrum recovery method and device
  • High spectral image shadow detection and spectrum recovery method and device
  • High spectral image shadow detection and spectrum recovery method and device

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Embodiment Construction

[0020] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0021] Such as figure 1 As shown, a method for shadow detection and spectral restoration of hyperspectral images, including:

[0022] S1, based on a predefined growth criterion, perform shadow detection on the hyperspectral image to obtain a shadow image G;

[0023] S2, based on the shadow image G, use erosion operation and expansion operation to obtain non-buffer image GS and buffer image G buffer ;

[0024] S3, using the moment matching method to restore the spectrum of the non-buffer image GS, and using the point spread function method to restore the buffer image G buffer Perform spectral recovery.

[0025] Since in the prior art, the algorithm for the detection an...

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Abstract

The invention provides a high spectral image shadow detection and spectrum recovery method and device. The method comprises steps that S1 based on pre-defined growth criteria, shadow detection on a high spectral image is carried out to acquire a shadow image G; S2, based on the shadow image G, erosion operation and dilation operation are utilized to acquire a non-buffer region image GS and a buffer region image Gbuffer; and S3, a moment matching method is utilized to carry out spectrum recovery of the non-buffer region image GS, and a point spread function method is utilized to carry out spectrum recovery of the buffer region image Gbuffer. The method is advantaged in that disadvantages in the prior art are solved, a shadow detection and recovery problem of the high spectral image is solved, the space and the spectral information of surface features covered by shadow can be more recovered, so image quality is improved, and more effective input for subsequent image processing is provided.

Description

technical field [0001] The present invention relates to the field of image processing, and more specifically, to a method and device for shadow detection and spectral restoration of hyperspectral images. Background technique [0002] At present, the key to distinguish hyperspectral images from traditional RGB images is that the spectral resolution in the imaging band range reaches the nanometer level, which enables the ground objects that cannot be identified in conventional remote sensing to be effectively identified and recognized in hyperspectral remote sensing. Quantitative inversion. [0003] However, in the quantitative inversion of hyperspectral remote sensing, the existence of hyperspectral image shadows seriously weakens the spatial and optical characteristics of the image, which directly affects the accuracy of quantitative inversion. Therefore, how to remove the influence of shadows and restore the spatial and spectral information of hyperspectral images It is on...

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Application Information

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IPC IPC(8): G06T5/00G06T7/11G06T7/155
CPCG06T5/001G06T5/008G06T2207/10036
Inventor 杨杭张立福孙雪剑岑奕任淯张鹏
Owner INST OF REMOTE SENSING & DIGITAL EARTH CHINESE ACADEMY OF SCI
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