Affiliations: [a] Dipartimento di Ingegneria Elettrotecnica ed Elettronica, Politecnico di Bari, Via Re David 200, 70126 Bari, Italy | [b] Digital Imaging and Video Division, Intel Corporation, 5000 W. Chandler Blvd., Chandler, AZ 85226-3699, USA | [c] Telecommunications Research Center, Department of Electrical Engineering, Arizona State University, Tempe, AZ 85287-7206, USA
Correspondence:
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Corresponding author.
Abstract: A perceptually-lossless wavelet-based image compression algorithm and architecture working directly in the R-G-B color domain is proposed. Even though the highest compression ratios are achievable in the Luminance-Chrominance domain, image sensors generate data commonly in a subsampled R-G-B format. Many real-time applications (e.g., a low cost digital camera) prohibit the on-line conversion of data from R-G-B format to any other format. Therefore, in these applications, it is desirable to apply the compression directly on R-G-B data. Our compression scheme is based on derived perceptually-lossless quantizing thresholds, and can be mapped into an ASIC yielding very high throughput. Examples illustrating the performance of the coder are presented.
