Advantages of Color Filter Array Removal from Digital Cameras
Jongwoo Joo, Daewook Kim · Advanced science and technology letters · 2015
In imaging devices such as digital cameras using a single image sensor, captured images are the sub-sampled images comprised of the pixels that have only one of the three primary colors per pixel. These images should be restored to the color images through image processing referred to as color interpolation. The color filter seated at the front of the image sensor restores colors. Thus, when the color filter is removed, monochrome images are yielded. When the luminance in the image sensor decreases, noise increases. Differently put, increasing the amount of light entering the image sensor will reduce the noise. This study eliminates the color filter at the front of a digital camera image sensor to increase the luminance and thus to decrease the noise, which in turn improves the resolution and acutance.