We have developed a new technique for color imaging of objects in darkness by irradiating infrared light to the objects and by imaging the reflected infrared light from the objects. Along with the surge of recent security consciousness, demand for security cameras such as crime prevention cameras or surveillance cameras rises more and more. However, conventional infrared imaging techniques provide only monochromatic images and have problems in low visibility. Therefore, a higher-performance imaging technique with high visibility is expected. The present technique is based on a highly sensitive infrared imaging technique and a high speed image processing technique. It makes possible to indicate objects in darkness in real time with equivalent or similar color to the color of the objects under visible light, resulting in a promising technique for various applications such as for security cameras, assist cameras for vehicles, etc.