DETECTING METHOD OF IMAGE OPERATION AND DETECTING DEVICE OF IMAGE OPERATION

摘要

PURPOSE: An image manipulation detection method and a device thereof are provided to detect whether a target image, which is examined, is manipulated or not by extracting Photo Response Non-Uniformity (PRNU) from the target image and extracting a correlation plane based on the extracted value. CONSTITUTION: An image manipulation detection device calculates the change rate of the size of a target image which is examined and restores the target image (S210). The image manipulation detection device extracts Photo Response Non-Uniformity (PRNU) from the target image (S220). The image manipulation detection device calculates Peak to Correlation Energy (PCE) using a correlation plane which is obtained by comparing the extracted PRNU and standard PRNU (S230, S240). The image manipulation detection device determines whether the device which photographed the target image is a standard device or not by comparing the calculated PCE and the standard PCE of the standard device (S250). [Reference numerals] (S210) Calculate the change rate of a target image and restore the target image for the size of a target image to respond to the calculated the change rate of size; (S220) Extract Photo Response Non-Uniformity (PRNU) from the target image; (S230) Use the PRNU value of the standard device to compare the similarity between the extracted PRNU value and the standard PRNU value; (S240) Calculate PCE value by using correlation section calculate through the comparison result; (S250) Determine whether the device which photographed the target image is a standard device or not by comparing the calculated PCE and the standard PCE of the standard device