Recover Chromatic Information of Images Spoiled by Near Infrared Radiation

CMOS imaging devices are widely used in digital image and video products. However, the strong responses to near infrared radiation of device's R, G and B channels cause the chromatic difference between the captured images and their original scenes. In this paper, we present a new method to solve the problem. After finding the reference pixels with the least value of G or B, we estimated the global ratio of near infrared radiation response to red radiation response. Then, the additive response to near infrared radiation was subtracted from the image's raw data of three channels, and the original scene's chromatic information was recovered for all pixels. The experimental result shows that the proposed algorithms can eliminate the effects of infrared radiation and recover chromatic saturation of original scenes without optical high pass filter.