Image Coding Algorithm Using Luminance-Chrominance Correlation and Spatial Correlation
Abstract:Most of conventional image coding algorithms have reduced spatial redundancies for compressing data. In our previous works, we have proposed a novel coding algorithm focused on luminance-chrominance (L-C) redundancies. This paper presents an improved coding algorithm by using both spatial correlation and L-C correlation in an opponent color space. First of all, an input color image is divided into a luminance component and two chromatic components in the opponent color space. The chromatic components are divided into regions, and each region is averaged for reducing spatial redundancies. In order to reduce the L-C redundancies, a ratio of chrominance to luminance, we call C/L component, was newly introduced. Finally the spatially averaged C/L components in each region and wavelet-coded luminance data are transmitted as compact code. The color image can be restored without degrading its sharpness by the multiplication of transmitted averaged C/L components to decoded luminance data. Moreover, the proposed coding algorithm has an option to optimize the C/L components in S-CIELAB visual space. This paper discusses the performances of proposed coding algorithm with experimental results for natural full color test images.
Document Type: Research Article
Publication date: January 1, 2004
For more than 25 years, NIP has been the leading forum for discussion of advances and new directions in non-impact and digital printing technologies. A comprehensive, industry-wide conference, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems, including drop-on-demand ink jet, wide format ink jet, desktop and continuous ink jet, toner-based electrophotographic printers, production digital printing systems, and thermal printing systems, as well as the engineering capability, optimization, and science involved in these fields.
Since 2005, NIP has been held in conjunction with the Digital Fabrication Conference.
- Information for Authors
- Submit a Paper
- Subscribe to this Title
- Membership Information
- Terms & Conditions
- ingentaconnect is not responsible for the content or availability of external websites