Rapid advancements in EO/IR imaging technology boosted by developments in focal plane array technology led to significant increase in performance, availability and accordingly in application in the various systems. As a consequence the more efforts in the area of possible countermeasure development are necessary. Starting from EO/IR generalized image forming process and related influences on the imager performances as key part of imager performance, using knowledge generated from well-established electronic countermeasure science and known results in EO/IR countermeasure application, EO/IR countermeasures classification is proposed. Using this classification the currently known countermeasures are analyzed trying to identify existing challenges for future efforts. Also the recent advanced in image processing techniques, i.e. application of artificial intelligence for automatic target recognition, could be used as EO/IR imaging counter-counter measure and should be considered separately.
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