Inverse tone mapping for bit-depth scalable image coding...

Details Inverse tone mapping for bit-depth scalable image coding... Inverse tone mapping for bit-depth scalable image coding...

2011-07-19

2011-07-19

Couso, Jose (Department: 2624)

Image analysis

Image compression or coding

Reexamination Certificate

active

07983496

ABSTRACT:
A method performs inverse tone mapping of an image in a decoder. For each block of each color channel of the image a scaling factor is determined by adding a predicted scaling factor for the current block to a difference between the predicted scaling factor and the scaling factor of an adjacent block. An offset value for the current block is determined by adding a predicted offset for the current block to a difference between the predicted offset value and the offset value of the adjacent block. The scaling factor and the offset value are applied to pixel intensity values of the current block to produce a mapped block. The inverse tone mapping can also be applied to blocks of different sizes.

REFERENCES:
patent: 5189511 (1993-02-01), Parulski et al.
patent: 7627187 (2009-12-01), Bossen
patent: 7881554 (2011-02-01), Castorina et al.

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