Remote-sensing image rapid-processing method

A technology of remote sensing images and processing methods, applied in the field of remote sensing communication, can solve the problems of inability to process remote sensing images, memory, video memory overflow, etc., and achieve the effects of fast processing, fast processing, and strong applicability

Inactive Publication Date: 2012-09-12
REMOTE SENSING APPLIED INST CHINESE ACAD OF SCI
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Problems solved by technology

At present, there are many image processing methods that can realize the fast Fourier transform (FFT) of images, but when processing huge images, memory and video memory overflow problems often occur, and the processing of remote sensing images cannot be completed.

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Embodiment Construction

[0018] The remote sensing image rapid processing method of the present invention adopts block technology in order to reduce the number of write operations. The processing method specifically includes: 1) judging whether to block the remote sensing image according to the size of the remote sensing image and GPU memory. If the remote sensing image can be processed by the GPU, all the remote sensing images are read into the GPU memory, and the two-dimensional Fourier transform of the remote sensing image is performed using GPU parallel computing; if the remote sensing image is too large to be processed by the GPU, then go to the next step. 2) Divide the remote sensing image into several row blocks that can be processed by computer memory and GPU memory, and use GPU to perform one-dimensional Fourier row transform on each row block; in order to avoid memory overflow when the remote sensing image is read into the computer memory, first It is necessary to divide the remote sensing im...

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Abstract

The invention discloses a remote-sensing image rapid-processing method. The method comprises the following steps: firstly, judging whether to perform blocking on a remote-sensing image according to sizes of the remote-sensing image and a GPU (Graphics Processing Unit) video memory, and performing step two if the remote-sensing image is required to be subjected to blocking; secondly, dividing the remote-sensing image into a plurality of row blocks which can be processed through a computer memory and the GPU video memory, and respectively performing one-dimensional Fourier row transformation on each row block through the GPU; thirdly, dividing a remote-sensing image into a plurality of line blocks which can be processed through the computer memory and the GPU video memory after processed results are recombined into a whole remote-sensing image, and respectively performing one-dimensional Fourier line transformation on each row block through the GPU; and fourthly, recombining processed results, so as to accomplish the processing of the whole remote-sensing image. The method solves the problem that mass remote-sensing image rapid Fourier transformation is limited to computer configuration.

Description

technical field [0001] The invention relates to the field of remote sensing communication, in particular to a fast processing method for remote sensing images. Background technique [0002] Fourier transform technology is a basic method in image processing, and has important application value in the fields of image coding and compression, image enhancement, image restoration, image segmentation, and image noise removal. With the development of remote sensing technology, the amount of remote sensing image data obtained is increasing, and the number of bands is also increasing. At present, there are many image processing methods that can realize the fast Fourier transform (FFT) of images, but when processing huge images, memory and video memory overflow problems often occur, and the processing of remote sensing images cannot be completed. Contents of the invention [0003] In view of the problems existing in the prior art, the purpose of the present invention is to provide ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00
Inventor 顾行发余涛杨雪孟庆岩赵利民谢东海
Owner REMOTE SENSING APPLIED INST CHINESE ACAD OF SCI
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