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Abstract

A method for increasing compression efficiency of a stereoscopic image encoder employed for compressively encoding first and second signals representing respective first and second views of a stereoscopic image, comprises: providing a first histogram of the first view and a second histogram of the second view, the first and second histograms representing a frequency of occurrence of a characteristic component of the first and second views, respectively; comparing the first histogram of the first view with the second histogram of the second view and estimating the mismatch in gain, a, and mismatch in offset, b, between the first and second views; correcting the stereoscopic image by multiplying the gain a and the second signal to obtain a gain corrected second signal for the stereoscopic image and adding the offset b to the gain corrected second signal to obtain a gain and offset corrected second signal, the gain and offset corrected second signal being obtained prior to encoding to increase encoding efficiency. The quality of the resulting stereoscopic image formed from decoding the first signal and gain and offset corrected second signal is greatly improved.

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First Claim