Specific chromatic errors: A quality assessment

Author

Bernardo, Marco V. ; Pinheiro, Antonio M. G. ; Pereira, Manuela ; Fiadeiro, Paulo T.

Author_Institution

Remote Sensing Unit, Univ. da Beira Interior, Covilha, Portugal

fYear

2013

fDate

3-5 July 2013

Firstpage

1

Lastpage

5

Abstract

A study on the perceived quality of images displayed with color changes is presented. Initially, two hyperspectral images colors were represented in the CIE 1976 (L*a*b*) color space under the D65 standard illuminant. The colors of each image were divided into four clusters with the application of the K-Means algorithm. A new set of images was created changing only one of the four color clusters. The color change results from the application of a predefined chromatic error to the chromatic coordinates (a*, b*) of all pixels in the cluster. Errors of 6, 9, 12 and 15 ΔE*_ab units were applied, using two different directions for each color cluster. These images were displayed for individuals visualization, that were asked to rank their quality based on their naturalness. The Mean Opinion Scores was computed and allowed to test and quantify the sensitivity to specific color changes.

Keywords

hyperspectral imaging; image colour analysis; pattern clustering; CIE 1976 color space; D65 standard illuminant; chromatic coordinates; color changes; color clusters; hyperspectral images colors; k-means algorithm; mean opinion scores; quality assessment; specific chromatic errors; Hyperspectral imaging; Image color analysis; Multimedia communication; Quality assessment; Standards; Visualization; Assessment; Color; Mean Opinion Score; Quality;

fLanguage

English

Publisher

ieee

Conference_Titel

Quality of Multimedia Experience (QoMEX), 2013 Fifth International Workshop on

Conference_Location

Klagenfurt am Wo??rthersee

Type

conf

DOI

10.1109/QoMEX.2013.6603192

Filename

6603192