American Journal of Engineering and Applied Sciences

Histogram Matching Schemes for Image Thresholding

Salah Ameer

DOI : 10.3844/ajeassp.2019.413.419

American Journal of Engineering and Applied Sciences

Volume 12, Issue 3

Pages 413-419


This paper proposes several novel schemes for image thresholding. The idea is simply to compare the original image histogram to that of the thresholded image. Element by element comparison (sum of absolute difference between the two histograms) is found to be of better performance than a single feature (area or size) comparison. The optimum threshold is the one producing the best comparison. Cumulative histogram is introduced as a generalization to the area under the curve and found to be of better performance. In addition, a new performance measure is suggested based on percentage of correct assignments in both foreground and background. Comparative results with Otsu shows the effectiveness of the proposed schemes.


© 2019 Salah Ameer. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.