Two Novel Wavelet-block based Stereo Image Compression Algorithms

M.Y. Nayan, E.A. Edirisinghe, and H.E. Bez (UK)

Keywords

Stereo Image Compression, Discrete Wavelet Transforms, JPEG, Disparity Compensation

Abstract

In this paper we propose two novel stereo image coding techniques, which use an architecture similar to that of a Discrete Cosine Transform (DCT) based baseline JPEG-CODEC [1], but effectively replaces the DCT technology by the more recently popularized Discrete Wavelet Transform (DWT) technology. Both techniques perform disparity compensation in the wavelet-block transform domain but differ in the actual strategies used for this purpose. We show that the proposed CODECs have superior rate distortion and subjective image quality performance as compared to DCT based stereo image compression techniques [2,3] and DWT-JPEG-Like coder proposed by us in [16]. As compared to these benchmark techniques, we report peak-signal-to-noise-ratio (PSNR) gains of up to 5 dB for the proposed CODECs.

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