Pyroelectric Irfpa Nonuniformity Correction Algorithm

In recent years, oversees cooled infrared thermal imaging techniques have developed from one-generation to three-generation, and integrated uncooled detector arrays are progressing rapidly. New-generation detectors such as infrared focal-plane arrays (IRFPA) arrived on the scene with radialization sensitivity and signal process functions offer greatly sensitivity and systems reliability. Since 1990, integrated uncooled detecting material and device have been investigated in our nation., but the research of uncooled thermal imaging detector arrays are beginningThe pyroelectric infrared focal plane array( IRFPA) is one of the mainstreams of the uncooled thermal imaging technology, but the primary defect of IRFPA is the non-uniformity which affects greatly the imaging quality, blurs the image ,so image character is not arrived and the detector lose the detectivity, and which limits the performance of the IRFPA greatly. The feasible and real-time non-uniformity correction (NUC) is a key technique to the IRFPA. This dissertation aims at the analysis and research of the NUC on the pyroelectric IRFPA.In this dissertation the present developing situation of IRFPA , composeing and characteristic of IR thermal instrument are summarized. The concept and evaluation standard are discussed in detail, and origin of IRFPA nonuniformity are analyzed thoroughly. The merit and flaw of the NUC algorityms are expounded , and these algorithms compared are simulated with MATLAB software. Finally, On the basis of analyzing the characteristic of pyroelectric IRFPA images, computer program based the FPGA&DSP hardware is programmed and debugged to perform the NUC and image processing algoritym.