Target contour extraction method based on full-color and hyperspectral image fusion

A hyperspectral image and panchromatic image technology, applied in the field of digital image processing, can solve problems such as not applicable to hyperspectral images, and achieve the effects of good universality, improved accuracy, and improved spatial resolution

Inactive Publication Date: 2019-04-05
北京市遥感信息研究所
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Problems solved by technology

On the other hand, there are very few target contour extraction methods for hyperspectral images, and the existing target contour extraction methods for

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  • Target contour extraction method based on full-color and hyperspectral image fusion
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  • Target contour extraction method based on full-color and hyperspectral image fusion

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Embodiment Construction

[0039] The specific implementation steps of the object contour extraction method based on the fusion of panchromatic and hyperspectral images provided by the present invention will be described in detail below in conjunction with the accompanying drawings. Such as figure 1 As shown, for panchromatic and hyperspectral images, the contour extraction of the target is achieved through the following steps:

[0040] (1) Using bilinear interpolation to convert the hyperspectral image I k (x,y) upsampled to the same spatial resolution as the panchromatic image, resulting in a hyperspectral upsampled image k represents the band number of the hyperspectral image, and its value range is an integer greater than 0.

[0041] Suppose pixel point I k (x+u,y+v) is the pixel point I of the k-th band of the hyperspectral image k (x,y), I k (x+1,y), I k (x,y+1) and I k An interpolation point between (x+1,y+1), where 0

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Abstract

The invention discloses a target contour extraction method based on fusion of a panchromatic image and a hyperspectral image, and the method comprises the steps: carrying out the sampling of the hyperspectral image to the same spatial resolution of the panchromatic image through interpolation, and obtaining a sampling image on the hyperspectral image; Weighting visible light and a near-infrared band of the sampling image on the hyperspectral image to obtain a low-resolution panchromatic image; generating a panchromatic and hyperspectral fusion image from the sampling image, the low-resolutionpanchromatic image and the panchromatic image on the hyperspectral image; calculating the class density and the distinction degree of each pixel of the panchromatic and hyper-spectral fusion image andthe product of the class density and the distinction degree of each pixel to obtain a central likelihood, and determining a central pixel; And dividing all pixels in the panchromatic and hyper-spectral fusion image into two categories according to the characteristic distances between the pixels and the central pixel, thereby obtaining the contour of the target. According to the invention, throughfusion of the panchromatic image and the hyperspectral image, the spatial resolution of the hyperspectral image is improved.

Description

technical field [0001] The invention relates to a method for extracting a target contour of a remote sensing image, in particular to a method for extracting a target contour based on fusion of panchromatic and hyperspectral images, and belongs to the technical field of digital image processing. Background technique [0002] Hyperspectral remote sensing images usually use tens to hundreds of continuous and subdivided spectral bands to simultaneously image ground objects in the visible, near-infrared, and mid-infrared regions of the electromagnetic spectrum. Its spectral resolution is very high, generally on the order of 10 nanometers. The spectral information of ground features recorded by hyperspectral images is extremely rich, and it plays an increasingly important role in fields such as mineral deposit detection, environmental and ocean monitoring, precision agriculture, forest survey, and national defense security. Although the spectral resolution of hyperspectral images...

Claims

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Application Information

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IPC IPC(8): G06T7/12G06T7/194
CPCG06T2207/10041G06T2207/20221G06T7/12G06T7/194
Inventor 赵鹏徐其志张帆张一鸣
Owner 北京市遥感信息研究所
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