Quality assessment of 3 d

SUBMITTED BY

SUMIT G RAUT

VINOD S RAUT

MANGESH N NIMSE

PROJECT GUIDE

Dr. Mrs. K.R.JOSHI

• What is quality assessment of images?

• What are the parameters related 2D/3D images?

• How 3D images are created(possible geometry)?

• What are available algorithms to assess image quality?

• Many more(etc…)

• It refers to creation of algorithms that gauge the perceived

quality of the visual stimuli.

• Since the ultimate receiver of any visual stimulus is a

human observer, his/her opinion of quality is what is of

import and is referred to as percieved quality of stimulus.

• Visual stimulus is a generic term that encompasses 2D

images,2D videos, 3D images, 3D videos, immersive

viewing environments and so on.

• Essentially, any captured stimulus that is incident upon

the eyes is referred to as a visual stimulus.

• There are two types of QA :

1)objective QA

2)subjective QA

Objective algorithms themselves are generally

categorized as

(1) full-reference (FR),

(2) no-reference (NR) and

(3) Reduced-reference (RR) algorithms

There are 26 parameters available for 2d imaging

They are based upon various properties like stuctural

geometry,human vision perception,distortion etc..

Eg.SSIM,HVS,SNR resp..

3D content is expected to make the transition from

movie theaters into living rooms .

Increasing peoples demand over 3D viewing expriences

Research and development and Study the new depths

for enhanced quality of images and videos.

To study 3D image we need to know Visual Depth

Cues:

Monoscopic Depth Cues (single 2D image)

Stereoscopic Depth Cues (two 2D images)

Motion Depth Cues (series of 2D images)

Physiological Depth Cues (body cues)

Interposition◦ An object that occludes another is closer

Shading◦ Shape info. Shadows are included here

Size◦ Usually, the larger object is closer

Linear Perspective◦ parallel lines converge at a single point

Surface Texture Gradient◦ more detail for closer objects

Height in the visual field◦ Higher the object is (vertically), the further it is

Atmospheric effects ◦ further away objects are blurrier

Brightness◦ further away objects are dimmer

Y

Z

X

Left and right-eye views of an image are computed and

alternately displayed on the screen.

A shuttering system occludes the right eye when the

left-eye image is being displayed and occludes the left-

eye when the right-eye image is being displayed.

SSIM

UQI

C4

stereo TV

3D display

entertainment(videos, games)

Practical Applications like Image filtering &

compression and medical imaging etc.

Experiments and evaluations for QA using SSIM and

UQI QM’s.

There implementation using ‘MATLAB’ or ‘C’.

A database of various images is required to collect on

which the code will be implemented.

Survey on its application on a real-time basis like in

medical imaging science, ‘THE SIXTH SENSE’, 3D

displays of hand-held devices and a lot more.

[1] Anush K. Moorthy , Student Member, IEEE and Alan C. Bovik, Member, IEEE

,Research Article “Visual Quality Assessment Algorithms : What Does the Future

Hold?”

[2] Alexandre Benoit, Patrick Le Callet (EURASIPMember),Patrizio Campisi

(EURASIPMember),and Romain Cousseau,Research Article “Quality Assessment of

Stereoscopic Images”, EURASIP Journal on Image and Video Processing Volume

2008, Article ID 659024, 13 pages doi:10.1155/2008/659024

[3]Alan C. Bovik ,LIVE, “LIVE Color+3D Database,”http://live.ece.utexas.edu.

[4] N. Ponomarenko, V. Lukin, A. Zelensky, K. Egiazarian, M. Carli, F. Battisti,

"TID2008 - A Database for Evaluation of Full-Reference Visual Quality Assessment

Metrics", Advances of Modern Radioelectronics, Vol. 10, pp. 30-45, 2009.

[5] ZHOU WANG AND ALAN C. BOVIK , “UNIVERSAL IMAGE QUALITY

INDEX” IEEE SIGNAL PROCESSING MARCH-2002.

[6] Zhou Wang, Member, IEEE, Alan C. Bovik, Fellow, IEEE Hamid R. Sheikh,

Student Member, IEEE, and Eero P. Simoncelli, Senior Member, IEEE, “Image Quality

Assessment: From Error Visibility to Structural Similarity”, IEEE TRANSACTIONS

ON IMAGE PROCESSING, VOL. 13, NO. 4, APRIL 2004