**8. Acknowledgment**

This research has been developed by a member of the research group G@TV (Group of Application of Visual Telecommunications) in Polytechnic University of Madrid (Universidad Politécnica de Madrid).

The work presented on this chapter is a result of multiple studies developed through years in the field of video quality assessment, including a software implementation based on fullreference and no-reference metrics. Additionally, multiple quality studies have been

Recent experiments by Tsirlin et al. describe the effect of crosstalk on the perceived

Due to imperfect depth maps, a degradation artifact is particularly notably around object boundaries. This is derived from a texture-depth misalignment whose apparition is consequence of techniques of capture and processing of 3D-images and must be supressed

Y. Zhao proposes a novel solution of suppression of misalignment and alignment enforcement between texture and depth to reduce background noises and foreground

The puppet-theatre effect is a size distortion characteristic of 3-D images, revealed as an annoying miniaturization that make people and other objects look like animated puppets

As a result appears the cardboard effect which is a distortion resulting in an unnatural depth percept, where objects appear distributed in the image as if they were in different

Both effects affect to the sensation of reality, spoiling it. The puppet-theatre effect is therefore not perceived as an artifact, physically measurable; rather, but should be

Studies from the NHK (Japan Broadcasting Corporation) research these phenomena by variation of position of the objects, and shooting, display and viewing conditions to predict

The large amount of studies developed for this purpose related to quality assessment gives a general idea about the importance of this theme in video compression. The evolution of metrics and techniques is constant, finding the best ways of evaluating the quality of video

A complete state of the art in quality assessment has been developed, describing techniques of subjective and objective assessment, with the most common artifacts and impairments

This research has been developed by a member of the research group G@TV (Group of Application of Visual Telecommunications) in Polytechnic University of Madrid

The work presented on this chapter is a result of multiple studies developed through years in the field of video quality assessment, including a software implementation based on fullreference and no-reference metrics. Additionally, multiple quality studies have been

magnitude of depth from disparity and from monocular occlusions.

erosion, respectively, among different types of boundary artifacts.

Spatial distortion prediction system for stereoscopic images.

subjectively evaluated, as it decreases the quality of the 3D experience.

derived from compression and transmission. In objective research,

**Boundaries** 

as much as possible.

**7. Conclusions** 

**8. Acknowledgment** 

(Universidad Politécnica de Madrid).

sequences.

**Puppet- theatre and cardboard effects** 

discrete depth planes, showing little volume.

the level of distortion introduced by this effect.

developed for a wide range of purposes and projects, such as ADI, Palco HD, ACTIVA, Furia and Buscamedia were financed by Spanish Ministry of Industry

In the environment of project ADI (Interactive High Definition) subjective assessment that analyzes the impact on users of High Definition TV (HDTV) as an evolution of Standard Definition (SDTV). Besides, objective quality assessment was developed. Palco HD project led by satellite communications company Hispasat and in collaboration with TSA (Telefónica Audiovisual Services) and RTVE (Spanish Radio and Television). Activa project led by cable company ONO and Buscamedia led by communications company Indra.

Also privately funded projects in collaboration with companies such as Telefónica I+D for developing no-reference objective quality assessment in video mobile environment or with platform Impulsa TDT, developing subjective assessment in order to define video settings in High Definition TDT (Terrestrial Digital Television).

Finally, thanks to David Jiménez for introducing me in the field of video quality assessment.
