Title :
Nonlinear dynamic range transformation in visual communication channels
Author :
Alter-Gartenberg, Rachel
Author_Institution :
Dept. of Comput. Sci., Coll. of William & Mary, Williamsburg, VA, USA
fDate :
3/1/1996 12:00:00 AM
Abstract :
The article evaluates nonlinear dynamic range transformation in the context of the end-to-end continuous-input/discrete processing/continuous-display imaging process. Dynamic range transformation is required when we have the following: (i) the wide dynamic range encountered in nature is compressed into the relatively narrow dynamic range of the display, particularly for spatially varying irradiance (e.g., shadow); (ii) coarse quantization is expanded to the wider dynamic range of the display; and (iii) nonlinear tone scale transformation compensates for the correction in the camera amplifier
Keywords :
data compression; image coding; image restoration; quantisation (signal); telecommunication channels; visual communication; camera amplifier compensation; coarse quantization; continuous display imaging; continuous input imaging; discrete processing; image restoration; nonlinear dynamic range transformation; nonlinear tone scale transformation; shadow; spatially varying irradiance; visual communication channels; Displays; Dynamic range; Image coding; Image converters; Image sampling; Optical imaging; Passband; Quantization; Signal sampling; Visual communication;
Journal_Title :
Image Processing, IEEE Transactions on
