Proceedings ArticleDOI
An automated approach for tone mapping operator parameter adjustment in security applications
TLDR
This paper presents the universal method for TMO parameters tuning, in order to maintain as many details as possible, which is desirable in security applications, and suggests possible increase in privacy intrusion.Abstract:
High Dynamic Range (HDR) imaging has been gaining popularity in recent years. Different from the traditional low dynamic range (LDR), HDR content tends to be visually more appealing and realistic as it can represent the dynamic range of the visual stimuli present in the real world. As a result, more scene details can be faithfully reproduced. As a direct consequence, the visual quality tends to improve. HDR can be also directly exploited for new applications such as video surveillance and other security tasks. Since more scene details are available in HDR, it can help in identifying/tracking visual information which otherwise might be difficult with typical LDR content due to factors such as lack/excess of illumination, extreme contrast in the scene, etc. On the other hand, with HDR, there might be issues related to increased privacy intrusion. To display the HDR content on the regular screen, tone-mapping operators (TMO) are used. In this paper, we present the universal method for TMO parameters tuning, in order to maintain as many details as possible, which is desirable in security applications. The method’s performance is verified on several TMOs by comparing the outcomes from tone-mapping with default and optimized parameters. The results suggest that the proposed approach preserves more information which could be of advantage for security surveillance but, on the other hand, makes us consider possible increase in privacy intrusion.read more
Citations
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Proceedings ArticleDOI
Performance evaluation of the emerging JPEG XT image compression standard
Antonio M. G. Pinheiro,Karel Fliegel,Pavel Korshunov,Lukas Krasula,Marco V. Bernardo,Manuela Pereira,Touradj Ebrahimi +6 more
TL;DR: It is demonstrated that profiles A and B lead to similar saturation of quality at the higher bit rates, while profile C exhibits no saturation, while Profiles B and C appear to be more dependent on TMOs used for the base layer compared to profile A.
Journal ArticleDOI
Preference of Experience in Image Tone-Mapping: Dataset and Framework for Objective Measures Comparison
TL;DR: A subjective experiment attempting to determine users’ preference with respect to these two types of content in two different viewing scenarios—with and without the HDR reference shows that the absence of the reference can significantly influence the subjects' preferences for the natural images, while no significant impact has been found in the case of the synthetic images.
Proceedings ArticleDOI
Influence of HDR reference on observers preference in tone-mapped images evaluation
TL;DR: Whether the preference of the participating subjects is significantly affected by the presence of the original high dynamic range (HDR) image displayed on the HDR screen or if they can obtain equivalent results from the test without the reference is determined.
Journal ArticleDOI
FFTMI: Features Fusion for Natural Tone-Mapped Images Quality Evaluation
TL;DR: A new objective metric for natural tone-mapped images is proposed, based on a fusion of several perceptually relevant features that have been carefully selected using an appropriate feature selection procedure, and shown to significantly outperform the tested metrics.
Proceedings ArticleDOI
Rendering of HDR content on LDR displays: an objective approach
TL;DR: This work investigates into a new objective method for TMO parameters optimization based on quantification of contrast reversal and naturalness that does not require any prior knowledge about the input HDR image and works independently on the used TMO.
References
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Proceedings ArticleDOI
Photographic tone reproduction for digital images
TL;DR: The work presented in this paper leverages the time-tested techniques of photographic practice to develop a new tone reproduction operator and uses and extends the techniques developed by Ansel Adams to deal with digital images.
Book
High Dynamic Range Imaging: Acquisition, Display, and Image-Based Lighting
TL;DR: The Human Visual System and HDR Tone Mapping and Frequency Domain and Gradient Domain Tone Reproduction and an Image-Based Lighting List of Symbols References Index are presented.
Journal ArticleDOI
A visibility matching tone reproduction operator for high dynamic range scenes
TL;DR: A tone reproduction operator is presented that preserves visibility in high dynamic range scenes and introduces a new histogram adjustment technique, based on the population of local adaptation luminances in a scene, that incorporates models for human contrast sensitivity, glare, spatial acuity, and color sensitivity.
Journal ArticleDOI
Photographic tone reproduction for digital images
TL;DR: In this article, the tone reproduction problem is also considered, which maps the potentially high dynamic range of real world luminances to the low dynamic ranges of the photographic print, which is a classic photographic task.
Journal ArticleDOI
Tone reproduction for realistic images
Jack Tumblin,Holly Rushmeier +1 more
TL;DR: Sensation-preserving conversions for display, already known in photography, printing, and television as tone reproduction methods, are discussed and ways of constructing a sensation-preservative display converter, or tone reproduction operator, for monochrome images are demonstrated.