Reproduction of Subsample Color CCD Image
亚采样彩色CCD图象的重建

To compress the data during image digitalizeing, storage and transmission, We always use subsample method to sample the color channels in order to cut off data rate, Then use bilinearity method to reconstruct it. How to find the best way to reconstruct the color information lead us to study the principles of subsample problem. The Nayquest law limits the signal band width to half of sample rate. In subsample condition, this point will reduce sharpness of image and cause false color on image edges. This paper is focus on the problem of image reproduction under subsample condition. On study of the features of nature image and human eyes, We found there are similarities in details of image RGB color Channels. After analyse the subsample problem, We found it's possible to rebuild the subsample image if we have the information of image grade. Take consideration of this two points, we bring forth a new way to build the CCD color image, and found this way will improve the image sharpness remarkably.