Heterology remote sensing image registration method

A remote sensing image and registration technology, applied in image analysis, image data processing, instruments, etc., can solve problems such as noise sensitivity, outlier point sensitivity, and point position deviation.

Active Publication Date: 2014-01-15
WUHAN UNIV
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Problems solved by technology

However, there are two problems in the traditional spectral map point set matching method: (1) Sensitive to noise: noise usually comes from the process of image acquisition and feature extraction, which will bring deviation to the position of the point; (

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Embodiment Construction

[0072] The present invention will be further described below in conjunction with the drawings and specific embodiments.

[0073] Please see figure 1 The technical solution adopted by the present invention is: a heterogeneous remote sensing image registration method, which is characterized by including the following steps:

[0074] Step 1: Use wavelet transform to perform multi-scale analysis on the reference image and the image to be registered to obtain the coarsest reference image and the coarsest image to be registered, so that the size of the decomposed image does not exceed 256×256 pixels; The reference image and the image to be registered are optical images, infrared images or SAR images.

[0075] Step 2: Perform straight line extraction on the coarsest scale reference image and the coarsest scale to be registered image and obtain the intersection set. The specific implementation includes the following sub-steps:

[0076] Step 2.1: Low-level feature extraction: Extract line fe...

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Abstract

The invention discloses a heterology remote sensing image registration method. According to the core idea, multi-scale matching is taken as a basis; straight line intersection points are used as elements; the point matching method of a joint Voronoi map and a spectrogram is used; iteration feature extraction and a matching policy are integrated; and the problems of heavy dependence on feature extraction, poor reliability, low accuracy and the like of the existing method are overcome. The method comprises the steps that multi-scale analysis is carried out on original images; straight line extraction and intersection point acquiring are carried out on the coarsest scale; the point matching method of the joint Voronoi map and the spectrogram is carried out on intersection point sets to acquire a homonymous point pair; whether a matching result is qualified is detected: if the matching result is qualified, going to the next step is carried out, otherwise self-adaptive parameter adjustment is carried out and straight line extraction and point set matching are carried out again; original transformation is carried out on the images to be registered, and straight line features are respectively extracted; homonymous straight line segments are searched, and a candidate homonymous point pair is acquired; a KNN map is used to acquire an accurate matched point pair; and a transformation parameter is solved. The method provided by the invention is mainly used for the registration of visible light, infrared, synthetic aperture radar (SAR) and other heterology remote sensing images.

Description

Technical field [0001] The invention belongs to the technical field of remote sensing image processing, and relates to a heterogeneous remote sensing image registration method, in particular to a heterogeneous remote sensing image registration method based on iterative line features and joint Voronoi diagram and spectrogram point matching. Background technique [0002] Image registration technology is a process of spatially aligning images taken in the same area at different times, different viewing angles, different sensors or different lighting conditions. Among them, the automatic registration of heterogeneous remote sensing images has always been a problem that needs to be solved in the field of remote sensing image processing, because the images of different sensors can reflect the different characteristics of the ground objects. For example, the optical image reflects the ground objects in the visible light and near-infrared wavelength range. Reflectance spectrum characteri...

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Application Information

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IPC IPC(8): G06T7/00
Inventor 眭海刚华凤徐川刘俊怡
Owner WUHAN UNIV
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