Abstract
Enhanced images by the traditional gamma correction (GC) method still have low contrast within high illuminance regions. In order to enhance the visibility in dark regions and simultaneously achieve high contrast in bright regions for low-light images, this paper proposes a novel method via a pair of complementary gamma functions (PCGF) by image fusion. We first define PCGF and then show its outstanding potential for low-light image enhancement by some preliminary experimental results. In order to release its performance and verify its effectiveness, we further design a simple enhancement method for low-light images based on it by an elaborately designed fusion strategy. Two input images for fusion are derived from the enhanced image by PCGF and that by proposed sharpening method, respectively. Experiments show that our proposed method can significantly enhance the detail and improve the contrast of low-light image. The qualitative experiment results show that the proposed method is effective and the comparative quantitative assessment shows that it outperforms other state-of-the-art methods.
Highlights
High quality images play an important role in object detection [1], image classification [2], and saliency detection [3] and so on
The main contributions of this paper can be summarized in following three aspects: 1) We define a pair of complementary gamma functions (PCGF)
In this paper, we define a pair of complementary gamma functions (PCGF) by which we can obtain an underexposed version and an overexposed version of the original low-light image so that we can combine them to achieve a moderate brightness
Summary
High quality images play an important role in object detection [1], image classification [2], and saliency detection [3] and so on. C. Li et al.: Low-Light Image Enhancement via PCGFs by Fusion different methods into a single one. In [23] and [24], two fusion-based methods are developed to improve the quality of low-light images. It is not clear how input images affect the performance during fusion Almost these methods still have low contrast within high illuminance regions. In order to enhance the visibility of dark regions and simultaneously achieve high contrast of bright regions for low-light images, this paper proposes a novel enhancement method by fusion.
Sign-in/Register to view highlights & summary 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.
