Local adaptive tone mapping with composite multiple gamma functions

Authors:
Sohsuke Shimoyama;Masaki Igarashi;Masayuki Ikebe;Junich Motohisa
Affiliations:
Hokkaido University, Graduate School of Information Science and Technology, Sapporo, Japan;Hokkaido University, Graduate School of Information Science and Technology, Sapporo, Japan;Hokkaido University, Graduate School of Information Science and Technology, Sapporo, Japan;Hokkaido University, Graduate School of Information Science and Technology, Sapporo, Japan
Venue:
ICIP'09 Proceedings of the 16th IEEE international conference on Image processing
Year:
2009

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Abstract

We describe a high-speed method of correcting and compressing the dynamic range of images that can be operated intuitively and naturally. Adaptive operations are conducted for shadow, middle, and highlight tones in the local areas of images. Although natural image processing can be achieved with default parameters, we can set the parameters for each of these three tones individually and intuitively. We attained two million pixels per 0.3 sec of operation and real-time VGA movie processing without the need for SIMD instruction, multi-thread operation, or additional hardware by using the Athlon64 X2 3800+ CPU.