[Testing of the power spectrum of image intensifier]

In the low-light-level image processing, the time-and-space-domain noise in the signal not only limits the lowest illumination of the system but also makes the image to show random glitter. Applicable testing and analytical technology for noise can enhance the image quality of existing system and provide basis and objective foundation for the development of new image apparatus. From the testing of the power spectrum of image intensifier with the CCD, it was shown that the noise is mostly assembled at the section of low frequency and is approximately white noise at the section of high frequency.