Abstract:
The present invention relates to a digital watermarking device capable of distinguishing concealment and falsification of video information. The present invention includes a first insertion unit inserting a robust watermark for concealing information into one or more frames of video content and a second insertion unit inserting a semi-fragile watermark for distinguishing the concealment and the falsification into one or more frames of the video content. The present invention can efficiently distinguish the concealment and the falsification of the video information. [Reference numerals] (10) First insertion unit; (20) Second insertion unit; (30) First detection unit; (40) Second detection unit
Abstract:
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
Abstract:
PURPOSE: An image identification device and a method thereof are provided to sense re-photographed illegal copyright infringement images uploaded on the Internet by discriminating whether an image is re-photographed on the basis of shot-based PRNU(Photo Response Non Uniformity) included in the image. CONSTITUTION: An image acquisition unit(120) acquires input images. A control unit(110) classifies the input image into shots which have at least one frame, detects PRNU corresponding to the shots, and judges whether the input image is a re-photographed image on the basis of the detected PRNU. A memory unit(130) stores information processed in an image identification device(100). [Reference numerals] (110) Control unit; (120) Image acquisition unit; (130) Memory unit
Abstract translation:目的:提供一种图像识别装置及其方法,用于通过基于拍摄的PRNU(Photo Response Non Uniformity)(Photo Response Non Uniformity)来辨别图像是否被重新拍摄,以感测在因特网上重新拍摄的非法侵犯版权的图像图像。 图片。 构成:图像采集单元(120)获取输入图像。 控制单元(110)将输入图像分类为具有至少一个帧的拍摄,检测与拍摄相对应的PRNU,并且基于检测到的PRNU来判断输入图像是否是重新拍摄的图像。 存储单元(130)存储在图像识别装置(100)中处理的信息。 (附图标记)(110)控制单元; (120)图像采集单元; (130)存储单元