An efficient multiple exposure image fusion in JPEG domain

Ramya Hebbalaguppe; Ramakrishna Kakarala

doi:10.1117/12.907899

24 January 2012 An efficient multiple exposure image fusion in JPEG domain

Ramya Hebbalaguppe, Ramakrishna Kakarala

Proceedings Volume 8299, Digital Photography VIII; 82990H (2012) https://doi.org/10.1117/12.907899
Event: IS&T/SPIE Electronic Imaging, 2012, Burlingame, California, United States

Abstract

In this paper, we describe a method to fuse multiple images taken with varying exposure times in the JPEG domain. The proposed algorithm finds its application in HDR image acquisition and image stabilization for hand-held devices like mobile phones, music players with cameras, digital cameras etc. Image acquisition at low light typically results in blurry and noisy images for hand-held camera's. Altering camera settings like ISO sensitivity, exposure times and aperture for low light image capture results in noise amplification, motion blur and reduction of depth-of-field respectively. The purpose of fusing multiple exposures is to combine the sharp details of the shorter exposure images with high signal-to-noise-ratio (SNR) of the longer exposure images. The algorithm requires only a single pass over all images, making it efficient. It comprises of - sigmoidal boosting of shorter exposed images, image fusion, artifact removal and saturation detection. Algorithm does not need more memory than a single JPEG macro block to be kept in memory making it feasible to be implemented as the part of a digital cameras hardware image processing engine. The Artifact removal step reuses the JPEGs built-in frequency analysis and hence benefits from the considerable optimization and design experience that is available for JPEG.

Citation Download Citation

Ramya Hebbalaguppe and Ramakrishna Kakarala "An efficient multiple exposure image fusion in JPEG domain", Proc. SPIE 8299, Digital Photography VIII, 82990H (24 January 2012); https://doi.org/10.1117/12.907899

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