ICR is short of IR-Cut filter Removable.
Day light is with visible lights and IR lights. Human eyes cannot see IR lights, but COMS can, so the color of image from COMS is red. In order to let image match to what people see, camera needs IR cut filter for day light. At night, camera needs IR light to enhance the image. If IR-cut filter is between lens and sensor, the IR light will be blocked. Therefore, IR-cut filter should be on at daytime and off at night.
An ICR is a mechanical shutter design. It is placed between the lens and the image sensor and is controlled by a motor or electromagnet.
When ICR is switched on, it will block infrared light and allow only visible light to pass through. When the ICR is switched off, Infrared light will be allowed and images will turn into black-and-white mode (by software), which is more sensitive to infrared light. |