Method for automatically extracting newly added construction land change image spot of high-resolution remote sensing image

Abstract

The invention discloses a method for automatically extracting a newly added construction land change image spot of a high-resolution remote sensing image. The method comprises the following steps: inputting two high-resolution remote sensing images of a same area at different periods and performing geometrical fine calibration and relative radiation calibration; respectively calculating textural features of all wave bands of the images at two periods; performing difference value operation on the textural features and the spectral signature of the images by waveband, thereby obtaining a difference value image and cutting thresholds; logically combining two-value result images of all wave bands; performing morphological closed operation, hole filling and small-area image spot removing treatment on the two-value result images after being logically combined in turn, thereby obtaining a change image spot of land utilization; making zone marks on the change image spot of land utilization so as to generate an image spot object; calculating the textural features of each image spot object in a remote sensing image at a new period; and extracting the newly added construction land change image spot. According to the method provided by the invention, the problem of extracting the newly added construction land is mainly solved, and meanwhile, the capacity of detecting the interior change of the construction land is achieved.

Description

technical field [0001] The invention relates to an image processing method, in particular to a method for automatically extracting new construction land change map spots in high-resolution remote sensing images. Background technique [0002] In recent years, with the rapid development of my country's economy and the rapid growth of population, the scale of cities has been expanding, and the area of ​​construction land has increased sharply. The continuous increase of land for urban construction has taken up cultivated land resources to varying degrees. At present, my country implements the most stringent farmland protection policy, and government departments at all levels urgently need to obtain accurate information on land use changes, especially the conversion of agricultural land to construction land. In addition, timely and accurate construction land change information is of great value for research and application fields such as urban planning, urban expansion, and urb...

AI Technical Summary

Problems solved by technology

[0005] Purpose of the invention: In view of the problems and deficiencies in the above-mentioned prior art, the purpose of the present invention is to provide a method for automatically extracting new construction land change patterns from high-resolution remote sensing images, mainly to solve the problem of extracting new construction land. problems, while having the ability to detect internal changes in built-up land

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