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热惯量遥感是红外遥感中利用物体固有的热惯性,来识别和解译各种地物的性质。要制作热惯量图必须把三幅相同目标的不同图像准确套合在一起,因此必须对红外扫描图像的各种畸变进行校正。一、模数转换由于多光谱红外扫描仪记录的是模拟信号,因此必须把模拟信号数字化转换成CCT数字磁带。模拟信号为行扫描格式。第1～n道图像信号中,滚动信号、地物信号、高低温信号均为有用信号,其余区间为无用信号。每个行周期T中,有1024个同步采样信号。每个同步采样信号模数转换一次产生1个字节数据,放在寄存器中。2个字节组成16位数据,通过16位并行接口,一次输入计算机内存中。每幅图像数据为1个文件,每行640个字节数据为一个记录
Thermal inertia remote sensing is the use of infrared thermal sensing inherent in the thermal inertia to identify and interpret the nature of various features. To create a thermal inertia map, three different images of the same target must be accurately nested together. Therefore, various aberrations of the infrared scanned image must be corrected. First, the analog-to-digital conversion Multi-spectral infrared scanner records the analog signal, digital conversion must be analog signals into CCT digital tape. Analog signal is line scan format. Among the first to n-th image signals, the rolling signal, the ground object signal, the high and low temperature signals are all useful signals, and the rest are unwanted signals. In each line cycle T, there are 1024 synchronous sampling signals. Analog-to-digital conversion of each synchronized sampling signal generates 1 byte of data, placed in the register. 2 bytes 16-bit data, through the 16-bit parallel interface, enter the computer memory. Each image data for a document, 640 bytes per line of data for a record