Abstract
In this paper, we propose tone-preserving contrast enhancement in images using rational tone mapping and constrained optimization. We first perform spike-removed histogram equalization (SRHE) for contrast enhancement to avoid over-enhancement caused by the conventional HE. We conduct rational tone mapping (RTM) with low-complexity to preserve the original tone continuity. Then, we formulate a constrained optimization problem consisting of the contrast enhancement and tone-preserving terms. By minimizing the objective function, we find the best trade-off between the two conflicting terms. Experimental results demonstrate that the proposed method enhances contrast in images while successfully preserving details, and outperforms state-of-the-art ones in both subjective and objective assessments.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
