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Image restoration system capable of improving imaging quality greatly

An imaging quality and image technology, applied in the field of image processing, can solve the problems of large system calculation, limited restoration accuracy, and poor real-time performance.

Active Publication Date: 2014-03-26
BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH
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Problems solved by technology

[0010] The technology of the invention solves the problem: overcomes the problems of poor real-time performance, large amount of system calculation, and limited restoration accuracy in the prior art, and provides an image restoration system that greatly improves imaging quality, achieves on-orbit real-time processing of remote sensing images, enhances image clarity and Effective noise suppression

Method used

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  • Image restoration system capable of improving imaging quality greatly
  • Image restoration system capable of improving imaging quality greatly
  • Image restoration system capable of improving imaging quality greatly

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Embodiment Construction

[0090] Such as figure 1 As shown, the system of the present invention consists of: image data storage module 1, edge spread function module 2 for edge method calculation, line spread function calculation module 3, normalized MTF function calculation module 4, MTFC digital filter coefficient calculation storage module 5 , raw image data boundary processing module 6, row image digital filter module 7, row filter image noise suppression module 8, row filter image storage module 9, column image digital filter module 10, column filter image noise suppression module 11 , Restoring the image storage module 12 .

[0091] 1. Image data storage module.

[0092] After the CCD outputs the focal plane analog signal, it is digitally quantized by AD conversion, buffered into the BlockRam in the FPGA and outputs the image digital signal.

[0093] 2. Calculation of the edge extension function module by the edge method.

[0094] (1) Select a remote sensing image containing ground edge texture...

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Abstract

The invention relates to an image restoration system capable of improving imaging quality greatly. The image restoration system comprises an image data storage module, an edge-method based edge spread function calculating module, a linear spread function calculating module, a normalized MTF(modulation transmission function) calculating module, an MTFC (modulation transfer function compensation) digital filter system coefficient calculation and storage module, an image data boundary processing module, a row image digital filtering module, a row filter image noise suppression module, a row filter image storage module, a line image digital filtering module, a line filter image noise suppression module and a restored image storage module. By the image restoration system capable of improving imaging quality greatly, real-time on-track processing of remote sensing images is realized, image definition is improved and noises are suppressed effectively.

Description

technical field [0001] The invention relates to an image restoration system for greatly improving imaging quality, belonging to the technical field of image processing. Background technique [0002] At present, most remote sensing image processing is done on the ground, but due to the limitation of transmission bandwidth, the remote sensing image generally needs to be compressed 3:1--8:1 before being transmitted from the satellite to the ground, and then decompressed after receiving it on the ground. There is a certain degree of distortion in the image, which affects the subsequent image enhancement processing to a certain extent. Therefore, before image compression, a series of image processing such as digital filtering must be performed on the original 14bit panchromatic image data, which reduces the image quality loss caused by lossy compression compared to image transmission back to the ground, and has high real-time performance. The image has been processed before bein...

Claims

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Application Information

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IPC IPC(8): G06T5/00H04N1/409
Inventor 赵丽婷张斐然武文波安源李春梅
Owner BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH
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