CAJ | 학술논문

红外双色比能够表征目标的温度信息，但点目标双色比受噪声、探测器盲闪元以及跨像元因素干扰，难以准确测量，影响测温精度。应用递归图法定性分析和判断了点目标双色比的非平稳性。针对这一特性，先对点目标信号应用移动平均滤波做预处理，再通过小波软阈值去噪对双色比进行降噪处理。试验结果表明，在信噪比大于12的条件下，该方法可以实现静态点目标1 K温度分辨率，慢速动态点目标2K温度分辨率。
홍외쌍색비능구표정목표적온도신식，단점목표쌍색비수조성、탐측기맹섬원이급과상원인소간우，난이준학측량，영향측온정도。응용체귀도법정성분석화판단료점목표쌍색비적비평은성。침대저일특성，선대점목표신호응용이동평균려파주예처리，재통과소파연역치거조대쌍색비진행강조처리。시험결과표명，재신조비대우12적조건하，해방법가이실현정태점목표1 K온도분변솔，만속동태점목표2K온도분변솔。
Infrared dual waveband radiation ratio can denote the blackbody’s temperature information, and can be used for temperature measurement. When using infrared dual waveband radiation ratio to measure the temperature of point target, it is difficult to achieve high-accuracy because of various kinds of noises. The recurrence plot theory was used to analyze the non-station of infrared dual waveband radiation ratio. According to the non-station of infrared dual waveband radiation ratio, the target’s response signal in IR single waveband was processed by moving average filter. The IR dual waveband radiation ratio was processed by wavelet soft-threshold filter. Experimental result indicate that, when the SNR>12, 1 K temperature accuracy can be achieved with above processing method for static point target, and 2 K temperature accuracy can be achieved for slow moving point target.