Publication

Comparison of Interactive Subjective Methodologies for Light Field Quality Evaluation

Touradj Ebrahimi, Irene Viola
2018
Conference Papers

Abstract

The recent advances in light field acquisition and rendering technologies have attracted a lot of interest from the scientific community. Due to their large amount of data, efficient compression of light field content is of paramount importance for storage and delivery. Quality evaluation plays a major role in assessing the impact of compression on visual perception. In particular, subjective methodologies for light field quality assessment must be carefully designed to ensure reliable results. In this paper, we present and compare two different methodologies to evaluate visual quality of light field contents. Both methodologies allow users to interact with the content and to freely decide which viewpoints to visualize. However, in the second methodology a brief animation of the available viewpoints is presented prior to interaction in order to ensure the same experience for all subjects. The time and patterns of interaction of both methods are compared and analyzed through a rigorous analysis. Conclusions provide useful insights for selecting the most appropriate light field evaluation methodology.

Official source

https://infoscience.epfl.ch/entities/publication/521c260c-d88c-419a-881f-5cb00b03f2af

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Touradj Ebrahimi, Irene Viola
2018
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/521c260c-d88c-419a-881f-5cb00b03f2af

About this result

Related concepts (20)

Data compression

In information theory, data compression, source coding, or bit-rate reduction is the process of encoding information using fewer bits than the original representation. Any particular compression is either lossy or lossless. Lossless compression reduces bits by identifying and eliminating statistical redundancy. No information is lost in lossless compression. Lossy compression reduces bits by removing unnecessary or less important information.

Methodology

In its most common sense, methodology is the study of research methods. However, the term can also refer to the methods themselves or to the philosophical discussion of associated background assumptions. A method is a structured procedure for bringing about a certain goal, like acquiring knowledge or verifying knowledge claims. This normally involves various steps, like choosing a sample, collecting data from this sample, and interpreting the data. The study of methods concerns a detailed description and analysis of these processes.

Image compression

Image compression is a type of data compression applied to s, to reduce their cost for storage or transmission. Algorithms may take advantage of visual perception and the statistical properties of image data to provide superior results compared with generic data compression methods which are used for other digital data. Image compression may be lossy or lossless. Lossless compression is preferred for archival purposes and often for medical imaging, technical drawings, clip art, or comics.

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