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Low Bit-Rate Compression of Facial Images

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3 Author(s)
Elad, M. ; Israel Inst. of Technol., Haifa ; Goldenberg, R.. ; Kimmel, R.

An efficient approach for face compression is introduced. Restricting a family of images to frontal facial mug shots enables us to first geometrically deform a given face into a canonical form in which the same facial features are mapped to the same spatial locations. Next, we break the image into tiles and model each image tile in a compact manner. Modeling the tile content relies on clustering the same tile location at many training images. A tree of vector-quantization dictionaries is constructed per location, and lossy compression is achieved using bit-allocation according to the significance of a tile. Repeating this modeling/coding scheme over several scales, the resulting multiscale algorithm is demonstrated to compress facial images at very low bit rates while keeping high visual qualities, outperforming JPEG-2000 performance significantly.

Published in:

Image Processing, IEEE Transactions on  (Volume:16 ,  Issue: 9 )

Date of Publication:

Sept. 2007

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