With the development of high-performance IRFPA, temperature field image measurement has been applied to the fields of industry and agriculture, national defence, health and epidemic prevention. In order to obtain a clearer and more accurate image of temperature field, we developed a coaxial beam splitting medium wave/long wave dual-band infrared temperature field image reconstruction experimental system using uncooled wide-band IRFPA. Then, a low frequency noise correction method in gradient domain is used to reduce the temperature measurement error caused by the non-uniformity of detectors. The temperature measurement error of central field of view is less than 3.5% and that of quadrangular field of view is less than 4.5% in the temperature range of 20~80°C by calibrating the temperature of the system using blackbody. Experimental results show that the method is effective. Finally, the equivalent temperature field image to the typical outfield image is given.
Infrared smoke interference technology seriously infected the combat effectiveness of photoelectric guided weapons in modern warfare. As a result of the occlusion caused by smoke screen, the robustness of image matching guidance algorithm will decrease. Thus, to judge whether there is smoke interference in images and smoke screen area extraction are of great importance for the accuracy of image matching guidance algorithm. However, most of the smoke detection methods aimed at fire early warning, so that they focused on whether smoke exists or not. While both of the discrimination of smoke interference and smoke screen area extraction are what we concern. In this paper, a smoke detection method based on superpixel segmentation and region merging is proposed. Firstly, over-segmentation regions of input infrared image with superpixel segmentation are obtained. Then, fusion texture feature of the image is computed. Finally, superpixel regions are merged based on the fusion features of each superpixel block obtained in the previous step and smoke screen area extraction is completed.
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