双目色调映射与改进的整体对比度和局部细节外文翻译资料

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DOI: 10.1111/cgf.13580

Pacific Graphics 2018

H. Fu, A. Ghosh, and J. Kopf

(Guest Editors)

Volume 37 (2018), Number 7

Binocular Tone Mapping with Improved Overall Contrast and Local Details

Zhuming Zhang2. 1 , Xinghong Hu2. 1 , Xueting Liu 1 and Tien-Tsin Wongdagger;1.2

1 The Chinese University of Hong Kong

2 Shenzhen Key Laboratory of Virtual Reality and Human Interaction Technology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, China

Abstract

Tone mapping is a commonly used technique that maps the set of colors in high-dynamic-range (HDR) images to another set of colors in low-dynamic-range (LDR) images, to fit the needfor print-outs, LCD monitors and projectors. Unfortunately, during the compression of dynamic range, the overall contrast and local details generally cannot be preserved simultaneously. Recently, with the increased use of stereoscopic devices, the notion of binocular tone mapping has been proposed in the existing research study. However, the existing research lacks the binocular perception study and is unable to generate the optimal binocular pair that presents the most visual content. In this paper, we propose a novel perception-based binocular tone mapping method, that can generate an optimal binocular image pair (generating left and right images simultaneously) from an HDR image that presents the most visual content by designing a binocular perception metric. Our method outperforms the existing method in terms of both visual and time performance.

CCS Concepts

●Computing methodologies → Perception; Image processing;

1. Introduction

Tone mapping is a commonly used technique that maps the set of colors in high-dynamic-range (HDR) images to another set of colors in low-dynamic-range (LDR) images, to fit the need for print-outs, LCD monitors and projectors. Unfortunately, tone mapping leads to unavoidable information loss due to the reduced dynamic range. During the compression of dynamic range, the overall contrast and local details generally cannot be preserved simultaneously (Fig. 1(a)) [RGPlowast;04]. To preserve overall contrast, details in extremely dark (minimal illumination) or extremely bright (maximal illumination) regions would be lost (the right image of Fig. 1(b)). To preserve the details in extreme-illumination regions, the image would look “flat” (the left image of Fig. 1(b)).

Recently, with the increased use of stereoscopic devices, the notion of binocular tone mapping has been proposed by Yang et al. [YZWH12]. The key is to map an HDR image to two LDR images with different tone mapping parameters, one as left image and the other as right image, so that more human-perceivable visual content can be presented with the binocular LDR image pair (Fig. 1(b)) than any single LDR image (Fig. 1(a) or either image of Fig. 1(b)) . It is shown in the existing literature that

when the left image and the right image are different in color and

dagger;

Corresponding author: Tien-Tsin Wong (ttwong@cse.cuhk.edu.hk).

Oc 2018 The Author(s)

Computer Graphics Forum Oc 2018 The Eurographics Association and John

Wiley amp; Sons Ltd. Published by John Wiley amp; Sons Ltd.

contrast, the fused vision by observing the binocular image pair via stereoscopic glasses is a non-linear combination, which may be able to preserve content from both views. Given an HDR image and any tone-mapped LDR image, Yang et al. proposed to look for another LDR image tone-mapped from the HDR input that has the largest visual difference with existing one, while preserving binocular fusibility for the LDR image pair, via an optimization framework. However, their method has three major problems. First, their method needs to fix one view and optimize the other, so it is unable to acquire an optimal binocular pair simultaneously from a given HDR image. Second, instead of directly measuring the

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