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Identification and replacement of defective pixel based on Matlab for IR sensor |
Minghui YANG1( ), Sihai CHEN1,2, Xin WU1, Wen FU1, Zhangli HUANG1 |
| 1. College of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China; 2. Wuhan National Laboratory for Optoelectronics, Wuhan 430074, China |
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Abstract Infrared focal plane arrays (IRFPAs) usually contain many defective pixels. These defective pixels have to be corrected because those can significantly impair the performance of infrared image of IRFPAs. As is known to all, infrared image acquisition and analysis based on Matlab can be helpful to identify and correct defective pixels. In this paper, we proposed a novel method to identify and correct defective pixels. In the phase of identification, the defective pixels could be identified by the algorithms combined with median filtering algorithm and improved standard deviation algorithm. In the phase of correction, proportion-spatial defective pixel replacement (PSDPR) algorithm was introduced to replace the defective pixels, and this method reduced the difficulty of replacement originating from the clustering phenomenon of defective pixels. In addition, an experiment of verification was done, and showed the proposed scheme worked effectively.
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| Keywords
infrared focal plane arrays (IRFPAs)
infrared image
median filtering algorithm
improved standard deviation algorithm
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Corresponding Author(s):
YANG Minghui,Email:ymhhuir@gmail.com
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Issue Date: 05 December 2011
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