Abstract

High dynamic range (HDR) imaging, aiming to increase the dynamic range of an image by merging multiexposure images, has attracted much attention. Ghosts are often observed in a resultant image, due to camera motion and object motion in the scene. Low-rank matrix completion (LRMC) provides an effective tool to remove ghosts. However, user specification of the included or excluded regions is required. In this paper, we propose a novel HDR imaging method based on bidirectional structural similarities and weighted low-rank matrix completion. In our method, we first propose the bidirectional structural similarities containing forward-projection structural similarity (FPSS) and backward-projection structural similarity (BPSS) to divide each image into four groups: motion region, saturated region in the source image, saturated region in the reference image, and static and unsaturated regions. Then, the weight maps and the motion maps constructed based on FPSS and BPSS are introduced in the weighted LRMC model to reconstruct the background irradiance maps. Experiments are conducted on several challenging image sets with complex scene, and the results show that the proposed method outperforms three current state-of-the-art methods and Photoshop cs6 and is robust to the reference image.

Highlights

  • Correction-based methods reconstruct the motion regions and the saturated regions based on the correlation

  • To address the limitations of the low-rank matrix completion (LRMC)-based High dynamic range (HDR) imaging methods, we present a novel HDR imaging method based on the bidirectional structural similarities and the weighted LRMC model

  • Noise could lead to incorrect region detection. us, we introduce FP structural similarity (FPSS) and BP structural similarity (BPSS) into graph cuts to generate the final motion maps and the weight maps, which are integrated into the weighted LRMC model. e low-rank matrix of the weighted LRMC model corresponds to the background irradiance

Read more

Summary

Introduction

Correction-based methods reconstruct the motion regions and the saturated regions based on the correlation. Based on the assumption that the intensity of image is linear to the irradiance of the scene, Oh et al [23] first proposed introducing the rank minimization in HDR imaging to detect motion and using the estimated sparse error to determine the weight maps. We propose the bidirectional structural similarities to segment an image into four groups: motion regions, saturated regions in the source image, saturated regions in the reference image, static and unsaturated regions.

Results
Conclusion
Full Text
Published version (Free)

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 call