微光电视在光测设备上应用的若干问题

本文重点对微光电视的动态范围窄和噪声大两个问题进行了比较详细的探讨。为了保证昼夜工作的动态范围,必须有光学调光,自动靶高压控制和自动增益控制及强光保护等多个环节谐调工作。对微光电视的椒盐噪声采用中值滤波最有效,针对具体情况,也可以采用信号延迟相加,调整背景光及降低增益等适用于实时处理要求的办法。

Several Problems in Applications of Optical Measurement Equipments with Faint Light TV Camera

A more detailed discuscion of two problems about the narrow dynamic range and seriousnoise of a faint light TV camera is presented in this paper. To ensure the faint light TV camera working perfectly at day and night ,multiple links have to be used together,which includeoptical adjustment, automatic control of the high voltage of the intensifier of the faint lightTV camera , and automatic gain contrtol.A median filter is very effective for removing thespiced salt noise of a picture froma faint light TV camera. On certain conditions,some methods are also effective for real-time processing,such as signal delay and superimposition,background light trimming and gain reduction and so on.