Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/102770
Title: Image retargeting quality assessment : a study of subjective scores and objective metrics
Authors: Ma, Lin
Lin, Weisi
Deng, Chenwei
Ngan, King Ngi
Keywords: DRNTU::Engineering::Computer science and engineering
Issue Date: 2012
Source: Ma, L., Lin, W., Deng, C., & Ngan, K. N. (2012). Image retargeting quality assessment : a study of subjective scores and objective metrics. IEEE journal of selected topics in signal processing, 6(6), 626-639.
Series/Report no.: IEEE journal of selected topics in signal processing
Abstract: This paper presents the result of a recent large-scale subjective study of image retargeting quality on a collection of images generated by several representative image retargeting methods. Owning to many approaches to image retargeting that have been developed, there is a need for a diverse independent public database of the retargeted images and the corresponding subjective scores to be freely available. We build an image retargeting quality database, in which 171 retargeted images (obtained from 57 natural source images of different contents) were created by several representative image retargeting methods. And the perceptual quality of each image is subjectively rated by at least 30 viewers, meanwhile the mean opinion scores (MOS) were obtained. It is revealed that the subject viewers have arrived at a reasonable agreement on the perceptual quality of the retargeted image. Therefore, the MOS values obtained can be regarded as the ground truth for evaluating the quality metric performances. The database is made publicly available (Image Retargeting Subjective Database, [Online]. Available: http://ivp.ee.cuhk.edu.hk/projects/demo/retargeting/index.html) to the research community in order to further research on the perceptual quality assessment of the retargeted images. Moreover, the built image retargeting database is analyzed from the perspectives of the retargeting scale, the retargeting method, and the source image content. We discuss how to retarget the images according to the scale requirement and the source image attribute information. Furthermore, several publicly available quality metrics for the retargeted images are evaluated on the built database. How to develop an effective quality metric for retargeted images is discussed through a specifically designed subjective testing process. It is demonstrated that the metric performance can be further improved, by fusing the descriptors of shape distortion and content information loss.
URI: https://hdl.handle.net/10356/102770
http://hdl.handle.net/10220/16442
ISSN: 1932-4553
DOI: 10.1109/JSTSP.2012.2211996
Rights: © 2012 IEEE
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:SCSE Journal Articles

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