DocumentCode :
226950
Title :
Image gradient index for classifying digital camera and scanned images
Author :
Mettripun, Narong ; Amornraksa, Thumrongrat
Author_Institution :
Fac. of Eng., Rajamankala Univ. of Technol. Lanna Chiang Rai, Chiang Rai, Thailand
fYear :
2014
fDate :
24-26 Sept. 2014
Firstpage :
474
Lastpage :
478
Abstract :
This paper presents a new method for distinguishing images captured using digital camera from that using scanner. The method is based on the concept that the residual noise present in images capture device always distorts the directional change in the intensity or color in an image i.e. image gradient, and the resultant distortions are greatly obtained from printing and scanning process, compared to photography process. Hence, the gradient index values of scanned images derived from gradient values of such image should be lower than the ones obtained from photographic images. Based on the above concept, we propose a method for classifying digital camera and scanned images using image gradient index. The proposed method is tested and its performance is evaluated. The experimental results show that the classification performance up to 95% on average can be achieved using our method achieved.
Keywords :
cameras; gradient index optics; image capture; image classification; image colour analysis; classification performance evaluation; digital camera image classification; directional change distorts; image capture device; image color; image gradient index values; image intensity; photographic images; printing process; residual noise; scanned image classification; scanning process; Digital cameras; Forensics; Indexes; Noise; Photography; Support vector machines; gradient index; image classifying; image gradient;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Communications and Information Technologies (ISCIT), 2014 14th International Symposium on
Conference_Location :
Incheon
Type :
conf
DOI :
10.1109/ISCIT.2014.7011958
Filename :
7011958
Link To Document :
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