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Secondly, the fractal dimensions of grayscale image and wavelet sub-bands are extracted as visual features. Thirdly, considering the shortage of the photo response non-uniformity noise (PRNU) acquired from wavelet based de-noising filter, a pre-processing of Gaussian high pass filter is applied to the image before the extraction of PRNU, and the physical features are calculated from the enhanced PRNU. In the identification, a support vector machine (SVM) classifier is used in experiments and an average classification accuracy of 94.29% is achieved, where the classification accuracy for computer generated graphics is 97.3% and for natural images is 91.28%. Analysis and discussion show that the method is suitable for the identification of natural images and computer generated graphics and can achieve better identification accuracy than the existing methods with fewer dimensions of features.<\/p>","DOI":"10.4018\/jdcf.2012010101","type":"journal-article","created":{"date-parts":[[2012,4,5]],"date-time":"2012-04-05T09:11:38Z","timestamp":1333617098000},"page":"1-16","source":"Crossref","is-referenced-by-count":12,"title":["Identification of Natural Images and Computer Generated Graphics Based on Hybrid Features"],"prefix":"10.4018","volume":"4","author":[{"given":"Fei","family":"Peng","sequence":"first","affiliation":[{"name":"Hunan University, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Juan","family":"Liu","sequence":"additional","affiliation":[{"name":"Hunan University, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Min","family":"Long","sequence":"additional","affiliation":[{"name":"Changsha University of Science and Technology, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"2432","reference":[{"key":"jdcf.2012010101-0","doi-asserted-by":"publisher","DOI":"10.1109\/83.806616"},{"key":"jdcf.2012010101-1","doi-asserted-by":"crossref","unstructured":"Chandra, M., Pandey, S., & Chaudhary, R. 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