Abstract—Image archive is a transformation from source to
its digital form. This process, however, often leads to the
irregular distribution of image illumination, which distorting
the content of images. In this article, we propose a hybrid
illumination technique based on double Niblack thresholds to
refine the brightness of under-exposure and over-exposure
images, including the text image and the text-photo image.
Experimental results have shown that the new method can
effectively adjust the illumination to improve the quality of
digital images.
Index Terms—Illumination, contrast enhancement, image
binarization, Niblack.
Y. H. Wang and J. S. Lee are with Feng Chia University, Taichung,
Taiwan (e-mail: leejs@fcu.edu.tw).
B. Li is with the Department of Electrical Engineering and Computer
Science, Vanderbilt University, Tennessee, USA.
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Cite: Yi-Hua Wang, Jung-San Lee, and Bo Li, "A Hybrid Illumination Refinement Technique Based on Double Niblack Thresholds," International Journal of Future Computer and Communication vol. 4, no. 6, pp. 426-430, 2015.
