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前言红外辐射的特征对红外电视摄象机设计有相当的限制,从红外景象来的信号反差低,而且均匀的背景分量大,但从可见景象来的信号反差高得多,而且背景可以忽略。红外摄象机必须有大的动态范围,以便累积背景信号而不饱和,同时还要有足够的灵敏度来分辨低反差的细节。此外,还需有一些消除背景信号分量的措施,以取得可以接受的显示反差。理论上说,消除背景应在帧的积分过程中进行,以便使作用在传感器及其有关读出机构上的动态
Preface The characteristics of infrared radiation have considerable restrictions on the design of infrared video cameras. The signal contrast from infrared images is low and the background components are uniform, but the signal contrast from the visible image is much higher and the background is negligible. Infrared cameras must have a large dynamic range in order to accumulate background signals without saturation, while also having sufficient sensitivity to distinguish low-contrast details. In addition, some measures to eliminate background signal components are needed to achieve acceptable display contrast. In theory, the elimination of the background should be carried out during the integration of the frame in order to make the dynamic acting on the sensor and its associated reading mechanism