The image sensor and monitoring systems

The present invention proposes types of image sensors and monitoring systems, the image sensor comprising: a color film for infrared light, the color film allows only a specific wavelength of infrared light by the color film comprises a plurality of n colors filter, for converting incident light is divided into n light colors; sensitive chip, comprising a signal processing circuit and a plurality of photosensitive units, each sensing unit sensing the light intensity of light transmitted through the filter of n colors, and generates an electrical signal, a signal processing circuit electrically the signal processing for imaging, the gain of a signal processing circuit generating an electrical signal corresponding to light transmitted through the filter n colors ratio A1: A2: ...: An, a plurality of n colors filter specific wavelengths of infrared light intensity ratio by 1: (A1 / A2): ...: (A1 / An). The image sensor of the present invention, the color of the captured image to the human eye actuator; weak in the visible and the infrared light is strong, it can shoot clear black and white images, wide range of applications and convenient, and reliable.