Infrared focal plane non-uniformity fingerprint extraction and image correction method

• Main Authors: YANG CHAO, YAN LUXIN, YUAN YAJING, ZHANG CHUNXIAO, ZHANG TIANXU, SHI CHANGCHENG, SANG HONGSHI, LIU HUINA
• Format: Patent
• Language: Chinese; English
• Published: 18.05.2011
• Subjects: COLORIMETRY; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT; MEASURING; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION; RADIATION PYROMETRY; TESTING

The invention relates to an infrared focal plane non-uniformity fingerprint extraction and image correction method which belongs to the technical field of infrared imaging. A production process decides, each infrared focal plane is provided with a relatively stable non-uniformity mode and a rule thereof which varies with temperature, and the two are collectively called fingerprints. The inventionprovides the definitions of non-conformity fingerprints, analyzes the characteristics of the focal plane non-uniformity in a frequency domain by wavelet decomposition, extracts the non-uniformity fingerprints which belong to the focal plane, and then stores the fingerprints in a storage unit of a detector. When in correction, with the environment temperature as the input parameter, the method cancarry out non-uniformity correction under the constraint of the fingerprints after reading the non-uniformity fingerprints at the environment temperature. Compared with convention methods, the methoddoes not need to obtain a b