Active illumination image capture device for low ambient light intensity

Abstract

This invention relates to an active illumination image capturing device for low ambient light intensity, used to capture images of target objects within a predetermined distance in low ambient light intensity environments with clutter interference. The device includes: a high-frequency pulsed light source, whose emitted light beam can illuminate the predetermined distance; an optical image capture unit having a light receiver and an electronic shutter with a frequency higher than a multiple of 1 / 15 second, thereby controlling the exposure time and outputting an image data signal of one frame; an image processor for receiving the image data signal; a drive signal generator for controlling the illumination time and synchronously outputting a control signal to the image processor; and the image processor calculating the illumination time based on the control signal and adding a clutter removal time, used to exclude frames corresponding to the illumination time and clutter removal time from the received frame images and then superimpose them.

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