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Marine ship detection method in optical remote sensing image

An optical remote sensing image, ship technology, applied in the direction of instruments, character and pattern recognition, computer components, etc., can solve complex problems, overcome the problem of black and white polarity, solve the problem of poor distinguishability of features, reduce the target The effect of the false alarm rate

Active Publication Date: 2013-10-16
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

[0004] In order to effectively solve the problem of detecting ships at sea in optical remote sensing images of complex sea surfaces, the present invention provides a method for detecting ships at sea in optical remote sensing images based on local contrast information and spatial pyramid features

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  • Marine ship detection method in optical remote sensing image
  • Marine ship detection method in optical remote sensing image
  • Marine ship detection method in optical remote sensing image

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Embodiment Construction

[0024] The method for detecting ship targets in optical remote sensing images provided by the present invention will be described in detail below in conjunction with the accompanying drawings.

[0025] figure 1 It is a flow chart of the ship detection method in the optical remote sensing image provided by the present invention. The first step of the flow chart is the segmentation of sea and land areas. The sea area is obtained through the segmentation of sea and land areas. First, based on the gray level difference between the sea surface and land, the binary segmentation threshold is determined according to the OTSU method, and the initial segmentation of sea area and land is obtained. Then, in the sea area Select the seed point and use the region growing method to obtain the sea surface area. The second rough detection of suspected ship targets is to use the Contrast Box algorithm with revised judgment criteria to detect a group of suspected ship target areas in the sea sur...

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Abstract

The invention provides an optical remote sensing image marine ship detection method based on local contrast information and a space pyramid characteristic. A technical scheme is characterized by: firstly, sliding a window in a sea area based on local contrast so as to carry out suspected object detection of a ship and reducing a false alarm of ship detection; then, for a suspected object area obtained through segmentation, taking a neighborhood according to a certain size of the window, using a space pyramid matching model to extract space context information so as to carry out classification, deleting background interference, acquiring a ship detection result and reducing the false alarm of the ship detection. By using the method of the invention, white polarity performance and black polarity performance problems of the ship can be effectively inhibited. Simultaneously, for a similarity problem of the ship object and the other interference and a difference problem possessed by ship object, the local neighborhood context information is introduced to carry out characteristic description and identification of the ship. The object and the background interference is distinguished and a false alarm rate of the ship detection can be effectively inhibited.

Description

technical field [0001] The invention relates to an intelligent ship target detection technology in the field of remote sensing image analysis, and more specifically, relates to a sea ship detection method of an optical remote sensing image under complex sea surface conditions. Background technique [0002] In optical remote sensing images, the problem of ship target detection in the complex sea background has always been a difficult point. On the one hand, due to the influence of many factors such as imaging devices, atmosphere, shooting angle, time, weather, etc., as well as the different reflection capabilities of different sea surface waves to light, the brightness, contrast and other information of optical remote sensing images vary greatly. It is unstable, the average brightness fluctuates, and the amplitude of its high-frequency information is greatly changed by the influence of waves and track. Specific to ship detection, due to the influence of light and ship surfac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00G06K9/32G06K9/46
Inventor 朱长仁郭军
Owner NAT UNIV OF DEFENSE TECH
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