Improvement of Image of Bayer Arrangement CCD using Image-shift

Abstract

We have developed a high-resolution color still camera by applying an image-shift of one pixel pitch displacement in the horizontal direction to a color still camera using a Bayer arrangement CCD. This two-positional imaging enables a simplified image-shift mechanism and high-speed imaging. We improved the resolution and suppressed chromatic moire by using a new chromatic moire suppression process that makes use of the correlation between RGB channels. We also eliminated the difference in light quantity between two images using a simple 1-dimensional lowpass filter in the horizontal direction. As a result, we have developed a digital still camera loaded with an image-shift mechanism that can be put to practical use. Our camera has higher resolution than a conventional camera using a Bayer arrangement CCD.