Free-Viewpoint_synthesized_videos Free-Viewpoint synthesized videos with subjective quality measures (ACR-HR)
|Categories||Quality Assessment / Videos|
|Processing||JPEG & JPEG 2000 / H.264 / HEVC|
|Quality assessment method||Absolute Category Rating - Hidden Reference|
|Resolution||1920x1080 / Between 1920x1080 and 960x540|
|Created the||28 Jan 2015|
Information & Goal
The Free-Viewpoint synthesized videos quality database contains 264 video sequences of 100 frames (around 7 seconds @15fps) in 1024x768 and 1920x1080 pixels resolution. Individual votes and MOS scores obtained by an ACR-HR experiment are provided.
Six different multiview sequences are considered in this database. 2 cameras were choosen to generate 50 intermediate synthesized views. The videos are composed by the visualisation from one original view to the other and come back by displaying all synthesized view on one frame.
From a given MVD sequence, two different view-points at one time instant t (also referred to as key frames in the following) were considered. The associated depth maps were encoded through seven depth map codecs under test. From the decoded depth maps, fifty intermediate viewpoints (equally separated) were generated in-between the two considered viewpoints. A sequence of 100 frames (at 10 fps) was built from the 50 intermediate virtual frames to simulate a smooth camera motion from left to right and from right to left.
This database was done to evaluate several depth coding algorithms by evaluating free-viewpoint video sequences at different bitrates. 50 synthesized view are generated from a still image for each content and a video is created with the combinaison of all synthesized view. More details can be found in the related publication.
This video quality database can be used to evaluate video quality metrics precision on specific degradations.
We used Absolute Category Rating - Hidden Reference (ACR-HR) and as test methodology.
We provide a spreadsheet with the individual scores, the Mean Opinion Score (MOS) and the Differential Mean Opinion Score (DMOS) for each of the 264 Processed Video Sequences (PVS).
The PVS (avi videos) are available on our FTP server and are in the AVI format.
The information about the source contents, video tested generation, subjective experiment environment and available data are provided in a description file.
|01||Balloons||Description : A man play with some balloons.
Author : Nagoya University.
|02||Book Arrival||Description : A man in an office standing up to welcome another man.
Author : Heinrich-Hertz-Institut.
|03||Dancer||Description : A man does break dance in front of building.
Author : Nokia.
|04||Gt_Fly||Description : A travelling in a far west city.
Author : Nokia.
|05||Kendo||Description : 2 people practice an ancient martial art.
Author : Nagoya University.
Description : A man and a girl reading the newspaper around a table when a man coming behind them.
Author : Gwangju Institute of Science and Technology (GIST).
Hypothetical Reference Circuits (HRC)
The Processed Video Sequences (PVS) were created using the following Hypothetical Reference Circuits (HRC). To have more information see the publication.
|HRC name||HRC description|
|C1||3D-HEVC Test Model, 3D-HTM 0.4, inter-view prediction and View Synthesis Optimization enabled.|
|C2||Multiview Video Coding (MVC), JM 18.4.|
|C3||HEVC Test Model, HM 6.1.|
|C4||JPEG2000, Kakadu implementation.|
|C5||a lossless-edge depth map coding based on optimized path and fast homogeneous diffusion.|
|C6||this algorithm exploits the correlation with color frames.|
|C7||Z-LAR-RP, a region-based algorithm.|
For each algorithm, there are 3 bitrates (the bitrate are not the same for the different algorithms). So there are 7*3=21 HRC.
The originals are provided. So 21+1=22 versions.
Each version were created by using blending or not so 2 versions are provided. So 22x2=44 versions (or HRC) are provided.
|Highlights of this database||Depth Images Based Rendering|
|Video format||Full HD or 1024x768|
|Video length||100 frames|
|Number of videos||264|
|Observation distance||3H (H is the Height of the Full HD sequence)|
|Pre screening||Snellen, Ishihara|
|Post screening (Rejection method)||VQEG Multimedia|
|Number of observers||27 (with 4 rejected)|
|Display model||Panasonic BT-3DL2550|
|Display resolution||Full HD (1920x1080 pixels)|
|Display max luminance||180cd/m²|
Source publication : Please, cite the following paper(s) in your publications if you use this database in your work
Database Download Guide for ftp://ftp.ivc.polytech.univ-nantes.fr/Free-Viewpoint_Synthesized_Video
Use a FTP Manager to download all files at once
With Filezilla (Windows, Linux, Mac OS)
- Download the FileZilla Client software at https://filezilla-project.org/ and install it.
- Launch File > Sites Manager and fill in the form. The Host is ftp.ivc.polytech.univ-nantes.fr. Use Anonymous for Logon Type. All others fields can be left blank. Finally, press Connect.
- In the first panel, you can see connection's logs. Normally, a message like Response: 220 ftproxy FTP server (Version 18.104.22.168 - 2005/01/11 13:03:28) ready. is printed.
- The left column below contains your computer file system and the selected folder. In the right column, you can see the FTP server file system and its selected folder.
- In the left colum, select the local directory in which receive the database. In the right panel, find Free-Viewpoint_Synthesized_Video , right click and press Download.
- Bottom panel shows file transfer informations. All files of the databases are being downloaded in your computer. Please wait during the transfer.
With WGET (Linux)
Copy and paste this command in a terminal :
wget -P your/destination/folder ftp://ftp.ivc.polytech.univ-nantes.fr/Free-Viewpoint_Synthesized_Video