A Novel Imaging Method for Cell Phone Camera in Low Ambient Light Conditions Using Flash and No-Flash Image Pairs

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概要

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• In lowlight conditions, images taken by phone cameras usually have too much noise, while images taken using a flash have a high signal-noise ratio (SNR) and look unnatural. This paper proposes a novel imaging method using flash/no-flash image pairs. Through transferring the natural tone of the former to the latter, the resulting image has a high SNR and maintains a natural appearance. For realtime implementation, we use two preview images, which are taken with and without flash, to estimate the transformation function in advance. Then we use this function to adjust the tone of the image captured with flash in real time. Thus, the method does not require a frame memory and it is suitable for cell phone cameras.

著者

• LUO Lin-bo

  Faculty of Mech. and Elect. Inf., China University of Geosciences

• LUO Lin-bo

  Faculty of Mech. & Elec. Inf., China University of Geosciences

• WANG Chang-shuai

  Dept. of Elect. and Comp. Eng., Hanyang University

• AN Sang-woo

  Dept. of Elect. and Comp. Eng., Hanyang University

• CHONG Jong-wha

  Dept. of Elect. and Comp. Eng., Hanyang University

• LI Ying-chun

  Dept. of Elect. and Comp. Eng., Hanyang University

• CHEN Jun

  Experimental Center of Inf. Tech., China University of Geosciences

• PARK Jong-joo

  Dept. of Elect. and Comp. Eng., Hanyang University

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• A Novel Imaging Method for Cell Phone Camera in Low Ambient Light Conditions Using Flash and No-Flash Image Pairs

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