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Remote sensing image ship target detection method based on sparse MobileNetV2 network

A remote sensing image and target detection technology, applied in the field of remote sensing image ship target detection, can solve the problems of difficult target feature extraction, large amount of remote sensing image data, redundant remote sensing image information, etc. On-orbit real-time analysis and detection efficiency improvement

Active Publication Date: 2019-08-02
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the difficulty in extracting target features due to the redundancy of ship remote sensing image information, and the difficulty in real-time analysis of satellites on orbit due to the contradiction between the large amount of remote sensing image data information and the weak on-orbit calculation and processing capabilities. problem, and proposed a remote sensing image ship target detection method based on sparse MobileNetV2 network

Method used

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  • Remote sensing image ship target detection method based on sparse MobileNetV2 network
  • Remote sensing image ship target detection method based on sparse MobileNetV2 network
  • Remote sensing image ship target detection method based on sparse MobileNetV2 network

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specific Embodiment approach 1

[0018] Specific implementation mode one: as figure 1 As shown, a remote sensing image ship target detection method based on a sparse MobileNetV2 network described in this embodiment, the method includes the following steps:

[0019] Step 1. Carry out overlapping cutting on the original remote sensing image according to the overlapping ratio α to obtain the cut image;

[0020] Step 2, downsampling the image block in the cut image in step 1, to obtain the downsampled image block;

[0021] Step 3. Establish a sparse MobileNetV2 network consisting of a seven-level convolutional layer and a pruned MobileNetV2 network;

[0022] And use the down-sampled image blocks in step 2 to train the seven-level convolutional layer, and use the image blocks in the cut image in step 1 to train the pruned MobileNetV2 network. When the number of training times reaches the set maximum number of iterations Stop iterating when , and obtain the trained sparse MobileNetV2 network;

[0023] Step 4. Fo...

specific Embodiment approach 2

[0027] Specific implementation mode two: the difference between this implementation mode and specific implementation mode one is: the specific process of the step one is:

[0028] According to the overlapping ratio α, the original remote sensing image with a size of 16k×16k pixels is overlapped and segmented to obtain the segmented image; in the segmented image, the size of each image block is 512×512 pixels.

[0029] The purpose of this embodiment is to make the ship target account for more than one-third of the small block image where it is located, and the purpose of overlapping is to ensure the integrity of the target and improve the accuracy of detection. Such as Figure 5 Shown is a schematic diagram of overlapping segmentation of the original remote sensing image.

specific Embodiment approach 3

[0030] Embodiment 3: This embodiment is different from Embodiment 2 in that: the image block included in the cut image is down-sampled, and the down-sampling method is a bilinear interpolation method.

[0031] The specific process of downsampling in this embodiment is as follows: the downsampling adopts the existing bilinear interpolation method, which is also called quadratic linear interpolation method. It uses the pixel values ​​of the corresponding four points in the original image to determine the pixel values ​​in the target image.

[0032] pseudocode

[0033] enter:

[0034] Img: original image

[0035] zmf: zoom factor

[0036] output:

[0037] new_img: output image

[0038] Step1: Find the size of the original image Img, which is recorded as height×width×channel, and then generate a matrix new_img with all 0s whose size is (zmf×height)×(zmf×width)×channel;

[0039] Step2: Extend the boundary of Img to get IT, the size is (height+2)×(width+2)×channel;

[0040] S...

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Abstract

The invention discloses a remote sensing image ship target detection method based on a sparse MobileNetV2 network, and belongs to the technical field of remote sensing image ship target detection. Themethod solves the problems that target features are difficult to extract due to ship remote sensing image information redundancy, and satellite in-orbit real-time analysis is difficult due to the contradiction between large remote sensing image data information amount and weak in-orbit calculation processing capability. The method comprises the following steps: carrying out overlapping segmentation and downsampling processing on a remote sensing image to obtain an image block after downsampling; using the down-sampled image blocks to train the seven sets of convolution layers, using the imageblocks in the overlapped and segmented images to train the pruned MobileNetV2 network, and obtaining the trained sparse MobileNetV2 network when the maximum number of iterations is achieved; and carrying out target detection on the to-be-detected remote sensing image by using the trained sparse MobileNetV2 network. The method can be applied to the technical field of remote sensing image ship target detection.

Description

technical field [0001] The invention belongs to the technical field of remote sensing image ship target detection, and in particular relates to a remote sensing image ship target detection method. Background technique [0002] In recent years, with the rapid development of aerospace remote sensing technology, remote sensing image processing technology has been widely used in military and civilian fields, especially target detection technology based on remote sensing images has become an important technical support for military reconnaissance, search and rescue operations. As the main transport carrier and important military target at sea, the detection and identification of ships is helpful for the dispatch and deployment of key sea areas, assisting in the rescue of ships in distress, and combating illegal acts at sea. Remote sensing images provide an extremely rich data source for them. However, the emergence of massive remote sensing data also brings more complex applicati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00
CPCG06V20/13G06V2201/07
Inventor 彭宇尹童马宁于金祥彭喜元
Owner HARBIN INST OF TECH
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