Novel adaptive color space transform and application to image compression

Various contemporary standards by Joint Picture Expert Group, which is used for compression, exploited the correlation among the color components using a component color space transform before the subband transform stage. The transforms used to de-correlate the colors are primarily the fixed kernel transforms, which are not suitable for large class of images. In this paper an image dependent color space transform (ID-CCT), exploiting the inter-channel redundancy optimally and which is very much suitable for compression has been proposed. Also the comparative performance has been evaluated and a significant improvement has been observed, objectively as well as subjectively over other quantifiable methods.

► This paper presents a novel adaptive color space transformation. ► This transform is applied to image compression. ► The proposed color space transform is based on SVD. ► The objective as well as subjective performance is found quite convincing. ► Also the ID-CCT may be applied for various other image processing applications.