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Mixed pixel adaptive decomposition method based on multi-scale window

A hybrid pixel, self-adaptive technology, applied in the interpretation of photos, re-radiation of electromagnetic waves, measurement devices, etc., can solve the problems of inability to adapt to complex and changeable surface conditions, lack of flexibility, etc., to avoid underdetermined problems, high spatial resolution

Inactive Publication Date: 2017-03-22
JILIN UNIV
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  • Application Information

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Problems solved by technology

The root cause of the above problems is that the fixed-scale window form adopted by the existing technology lacks flexibility when constructing the solution equation system of mixed pixels, and cannot adapt to complex and changeable surface conditions.

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  • Mixed pixel adaptive decomposition method based on multi-scale window
  • Mixed pixel adaptive decomposition method based on multi-scale window
  • Mixed pixel adaptive decomposition method based on multi-scale window

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Embodiment Construction

[0034] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0035] First, collect low-spatial-resolution remote sensing images and high-spatial-resolution surface classification maps of the same area and the same range, and use these two images as known data;

[0036] Then, for each band of the remote sensing image with low spatial resolution, traverse each pixel on it, and process each pixel as follows:

[0037] The first step is to count the components and their abundances within the spatial scope of the mixed pixel (the component is the category in the surface classification map, and the abundance is the proportion of the component to the area of ​​the pixel), referring to the mixed image The number of components in the unit to establish the initial window scale (formula such as: S is the window scale,...

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Abstract

The present invention relates to a mixed pixel adaptive decomposition method based on a multi-scale window. The method comprises the steps of gathering the components and the abundances thereof within a mixed pixel space range, and establishing an initial window scale; b constructing a system of linear equations which takes the pixel values and the abundances as the known numbers and the component values as the unknown numbers; c calculating the linear correlation of the equations in the system of equations, and determining whether the system of equations belongs to an underdetermined system of equations; d if the constructed system of equations belongs to the underdetermined system of equations, increasing the window scale by two pixel units as the new window scale, and repeating the steps b and c; e according to the calculated component values, constructing the high-spatial resolution component value images within the mixed pixel space range. By calculating the number of the to-be-decomposed mixed pixel components on the image, the multi-scale window is obtained, a calculation system of equations of the mixed pixels is constructed adaptively, an underdetermined problem can be avoided, the mixed pixels on the image can be decomposed smoothly, and the component images of higher spatial resolution can be obtained.

Description

technical field [0001] The invention relates to a remote sensing digital image processing technology in the subject of photogrammetry and remote sensing, in particular to an image mixing pixel decomposition method. Background technique [0002] The spatial resolution of remote sensing imagery is one of the important characteristics that determine its application value. Due to the technical constraints of some remote sensing sensors, the spatial resolution of imaging pixels is often lower than that of surface research objects. This makes the record value of some pixels are composed of a mixture of multiple types of ground objects, which reduces the application value of the image. When using this kind of low spatial resolution image research and application, in order to obtain the reflection value of each object category in the mixed pixel, it is necessary to decompose the mixed pixel. [0003] In the process of decomposing the mixed pixel, the object category in the mixed p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G01C11/04G01S17/89
CPCG01C11/04G01S17/89G06V20/13
Inventor 刘博宇
Owner JILIN UNIV
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