Reassembling Method for JPEG Fragment Based on Degree of Difference
XU Rong-sheng · Jisuanji gongcheng · 2011
According to the feature of computer forensic,a method is proposed to reassemble JPEG fragment files and the reassemble progress is described.By analyzing JPEG file structure,an algorithm called JFDDM(JPEG Fragment Degree of Difference Matching) for reassembling JPEG fragmented files is proposed and discussed,by which the MCU' degree of difference in the image and the similarity between adjacent pixels are exploited to decide whether current fragments fall within the same image.Experimental results show that this is an effective method for JPEG fragment reassembling.