Method for extracting offshore culture area in satellite image based on scale space transformation

Abstract

The invention provides a method for extracting an offshore culture area in a satellite image based on scale space transformation, which is characterized by comprising the following steps of 1) extracting a water body area in a remote sensing image by utilizing an NDWI index on the basis of remote sensing image segmentation; 2) respectively carrying out large-scale and small-scale space transformation on each waveband of the remote sensing image of the water body area, and carrying out subtraction operation on a large-scale space transformation result and a small-scale space transformation result to obtain a multi-waveband local enhancement image; 3) selecting a sample set in the target area, and performing vector projection transformation on the multi-band local enhanced image to obtain abreeding area feature map; and 4) observing the target area, determining a threshold value, and then extracting the breeding area from the breeding area feature map. According to the offshore culturearea extraction method, a cross-scale operation mechanism in an image scale space is applied, and the high-precision extraction of multiple types of offshore culture areas in the satellite remote sensing image is achieved through a double-threshold method on the basis of full-band vector projection transformation.

Description

Technical field [0001] The invention belongs to the technical field of digital image processing, and in particular relates to a method for extracting marine aquaculture areas in satellite images based on scale space transformation. Background technique [0002] Aquaculture on the sea provides a large amount of food for humans and promotes coastal economic benefits, but it also brings about serious environmental problems. Timely and accurate acquisition of the spatial distribution information of marine aquaculture is of great significance to the management of the development of marine aquaculture and the early warning of disasters such as typhoons and storm surges. Satellite remote sensing data has a wide monitoring range, short acquisition time, and rich ground feature information, which can be used to monitor the aquaculture information more macroscopically and quickly. Therefore, the development of satellite remote sensing to obtain marine aquaculture extraction technology can...

AI Technical Summary

Problems solved by technology

However, the above methods still have the following problems: (1) In the satellite remote sensing images with a wide coverage and low cost of 15-30 meters resolution, the image segmentation accuracy is low, resulting in the above object-oriented method based on image segmentation. Low; (2) NDVI-based indicators only use information in the red band and near-infrared band, and the extraction type is limited to raft farming, and it is difficult to further improve the extraction accuracy; (3) It is difficult to improve Recall and precision of extraction precision

[0004] To retrieve Chinese and foreign literature, there is no method for extracting marine breeding areas based on satellite images in the prior art that combines cross-scale operations of scale space transformation, vector projection transformation, and double threshold extraction

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