Method for strengthening infrared focal plane array image

An infrared focal plane, array image technology, applied in image enhancement, image data processing, instruments, etc., can solve problems such as low algorithm efficiency, low stretching flexibility, and increased cost

Inactive Publication Date: 2009-10-28
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

However, histogram statistics usually require a storage space of about a whole image, such as the article "FPGA Realization of Histogram Equalization of Video Image Gray Signal Signal" in "Application of Electronic Technology" No. 11, 2006. The advantage is that histogram equalization It can play a good role in image enhancement, but the disadvantage is that it does not solve the problem that the histogram statistics need to consume a lot of sto

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  • Method for strengthening infrared focal plane array image
  • Method for strengthening infrared focal plane array image
  • Method for strengthening infrared focal plane array image

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Embodiment Construction

[0043] The invention divides the image into bright objects and dark areas, and stretches them separately, effectively enhancing the details of the large-area dark areas of the image, and suppressing the influence of small-area bright objects on the effect of the stretching algorithm.

[0044] The key of the present invention is to obtain the three gray values ​​of the nth frame image, i.e. the minimum gray value X of the frame image min n , the maximum gray value X max n and the gray value X of the segmentation point b n , used to stretch the n+1th frame image, n is the frame number of the image, and the image resolution size is M*N.

[0045] Gray value less than X min n The number of pixels accounts for min% of the total number of image pixels, that is, M*N*min%;

[0046] Gray value less than X max n The number of pixels accounts for max% of the total number of image pixels, that is, M*N*max%;

[0047] Gray value less than X b n The number of pixels accounts for b...

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Abstract

The invention discloses a method for strengthening an infrared focal plane array image, pertains to the field of infrared focal plane detector, particularly relates to the hardware realization of a specified image processing algorithm, and aims at extending image gray value and increasing computerization speed under the condition of limited FPGA storage resource. The method comprises the steps of median filtering, sub-point access and sub-section extension. The median filter adopted by the method eliminates spiced salt noise in the image and the sub-section extension effectively strengthens the detailed part of the dark image area. The algorithm requires no external memory, has low requirement for the FPGA storage resource and good real-time property and can effectively fit the high requirement of the infrared focal plane detector to image strengthening processing.

Description

technical field [0001] The invention belongs to the field of infrared focal plane detectors, in particular to an infrared focal plane array image enhancement method. Background technique [0002] Infrared imaging systems have evolved with the development of infrared detectors. In the first generation of infrared imaging systems, linear detectors are used to realize imaging through one-dimensional optical-mechanical scanning. With the maturity of CCD (Charge Coupled Device, electrically coupled device) related technologies, in the mid-1970s, the appearance of IRFPA (Infrared Focal Plane Array, infrared focal plane array) detector marked the second generation of infrared imaging system - staring The birth of the infrared imaging system. Compared with linear detectors, focal plane detector imaging has the advantages of high spatial resolution, strong detection capability, and high frame rate, and is rapidly becoming the mainstream device of infrared imaging technology. At pr...

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Application Information

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IPC IPC(8): G06T5/00
Inventor 钟胜王波颜露新张天序桑农李扬刘涛张磊王晓光王建辉
Owner HUAZHONG UNIV OF SCI & TECH
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