Gain and offset correction for efficient stereoscopic coding and

Details Gain and offset correction for efficient stereoscopic coding and Gain and offset correction for efficient stereoscopic coding and

1996-10-15

2000-08-29

Le, Vu

Television

Stereoscopic

348 43, 348 47, H04N 1300

Patent

active

061115967

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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