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Paper Abstract and Keywords
Presentation 2013-12-10 09:10
A Fixed-Point Tone Mapping Operation for HDR Images and Its Evaluation of Memory Usage
Toshiyuki Dobashi, Tatsuya Murofushi (Tokyo Metro. Univ.), Masahiro Iwahashi (Nagaoka Univ. of Tech.), Hitoshi Kiya (Tokyo Metro. Univ.)
Abstract (in Japanese) (See Japanese page) 
(in English) This paper proposes a tone mapping operation (TMO) with a low memory cost and a low computational cost.
A TMO generates a low dynamic range (LDR) image from a high dynamic range (HDR) image by compressing its dynamic range.
Due to an HDR image is generally expressed in floating-point data, a TMO is also executed with floating-point arithmetic.
The proposed method treats a floating-point number as two 8-bit integer numbers which correspond to a exponent part and a mantissa part, and applies tone mapping to these integer numbers separately.
Moreover, the method conducts calculations in the tone mapping with fixed-point arithmetic.
As a result, the method reduces a memory cost and a computational cost.
The experimental and evaluation results show that the method has high accuracy of a TMO, though reducing memory and computational cost.
Keyword (in Japanese) (See Japanese page) 
(in English) Tone mapping / High dynamic range / fixed-point / Low-memory / / / /  
Reference Info. ITE Tech. Rep., vol. 37, no. 56, ME2013-129, pp. 41-44, Dec. 2013.
Paper # ME2013-129 
Date of Issue 2013-12-02 (ME) 
ISSN Print edition: ISSN 1342-6893  Online edition: ISSN 2424-1970
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Conference Information
Committee ME  
Conference Date 2013-12-09 - 2013-12-10 
Place (in Japanese) (See Japanese page) 
Place (in English) Matuyasensen 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To ME 
Conference Code 2013-12-ME 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Fixed-Point Tone Mapping Operation for HDR Images and Its Evaluation of Memory Usage 
Sub Title (in English)  
Keyword(1) Tone mapping  
Keyword(2) High dynamic range  
Keyword(3) fixed-point  
Keyword(4) Low-memory  
1st Author's Name Toshiyuki Dobashi  
1st Author's Affiliation Tokyo Metropolitan University (Tokyo Metro. Univ.)
2nd Author's Name Tatsuya Murofushi  
2nd Author's Affiliation Tokyo Metropolitan University (Tokyo Metro. Univ.)
3rd Author's Name Masahiro Iwahashi  
3rd Author's Affiliation Nagaoka University of Technology (Nagaoka Univ. of Tech.)
4th Author's Name Hitoshi Kiya  
4th Author's Affiliation Tokyo Metropolitan University (Tokyo Metro. Univ.)
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Date Time 2013-12-10 09:10:00 
Presentation Time 25 
Registration for ME 
Paper # ITE-ME2013-129 
Volume (vol) ITE-37 
Number (no) no.56 
Page pp.41-44 
#Pages ITE-4 
Date of Issue ITE-ME-2013-12-02 

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