SYSTEM AND METHOD FOR SUBTRACTING DARK NOISE FROM IMAGE USING ESTIMATED DARK NOISE SCALE FACTOR

摘要

PROBLEM TO BE SOLVED: To provide an image processing system and method for subtracting dark noise from images without requiring use of "black pixel". SOLUTION: An image processing system 10 subtracts dark noise out of images based on a dark noise scale factor 220. The image processing system 10 includes an image sensor 20 for capturing a current image and producing current image data 50 representing the current image. The current image data 50 include both a dark noise signal and an image signal 90. The dark noise scale factor 220 for the current image is estimated from the current image data 50 and reference image data 80 representing a reference dark noise signal. The reference dark noise signal is scaled by the dark noise scale factor 220 to produce a scaled dark noise signal, and this signal is subtracted from the current image data 50 to produce the image signal 90. COPYRIGHT: (C)2007,JPO&INPIT