We present an algorithm that enables one to perform locally adaptive block thresholding, while maintaining image continuity. Images are divided into sub-images based some standard image attributes and thresholding technique is employed over the sub-images. The present algorithm makes use of the thresholds of neighboring sub-images to calculate a range of values. The image continuity is taken care by choosing the threshold of the sub-image under consideration to lie within the above range. After examining the average range values for various sub-image sizes of a variety of images, it was found that the range of acceptable threshold values is substantially high, justifying our assumption of exploiting the freedom of range for bringing out local details.
@article{arxiv.cs/0603041,
title = {Locally Adaptive Block Thresholding Method with Continuity Constraint},
author = {S. Hemachander and Amit Verma and Siddharth Arora and Prasanta K. Panigrahi},
journal= {arXiv preprint arXiv:cs/0603041},
year = {2007}
}