公开(公告)号：EP3171584A1

公开(公告)日：2017-05-24

申请号：EP14897784.6

申请日：2014-07-14

申请人： Fujitsu Limited

发明人： KATO, Keizo ,  KURAKI, Kensuke ,  TANAKA, Ryuta

IPC分类号： H04N1/387 ,  G06T1/00 ,  H04N5/74 ,  H04N19/467

CPC分类号： G06T1/0071 ,  G06T1/0085 ,  G06T2201/0051 ,  G06T2201/0061 ,  G06T2201/0065 ,  H04N1/387 ,  H04N5/74 ,  H04N19/467

摘要： A detecting device (200) includes a dividing unit (260b), an identifying unit (260c), and an extracting unit (260d). The dividing unit (260b) divides each set of image data, which is included in visual information (250a), into a plurality of areas. The visual information (250a) represents information of videos of information projected by lighting devices that project image data having a plurality of sets of digital watermark information, in each of which the frequency and the amplitude are constant and the phase is reversed depending on whether "bit 1" or "bit 0" is indicated, embedded therein in a synchronized manner. The identifying unit (260c) extracts the amplitude of the digital watermark information based on the small areas of each set of image data, and identifies such successive areas in which the amplitude of the digital watermark information is constant as the target areas for extraction. The extracting unit (260d) extracts information corresponding to digital watermarking information from the target areas for extraction.

摘要翻译： 检测装置（200）包括分割单元（260b），识别单元（260c）和提取单元（260d）。 分割部（260b）将视觉信息（250a）中包含的各图像数据分割为多个区域。 视觉信息（250a）表示由投影具有多组数字水印信息的图像数据的照明设备投射的信息的视频的信息，其中每个数字水印信息的频率和幅度是恒定的，并且相位根据“ 位1“或”位0“被指示，以同步的方式嵌入其中。 识别单元（260c）基于每组图像数据的小区域来提取数字水印信息的幅度，并且将数字水印信息的幅度恒定的这样的连续区域识别为用于提取的目标区域。 提取单元（260d）从目标区域提取对应于数字水印信息的信息以进行提取。

公开(公告)号：EP2154815A1

公开(公告)日：2010-02-17

申请号：EP07737237.3

申请日：2007-05-30

申请人： Fujitsu Limited

发明人： KURAKI, Kensuke ,  NAKAGATA, Shohei ,  ANAN, Taizo

IPC分类号： H04L9/08 ,  G06F21/24 ,  G09C5/00

CPC分类号： G09C5/00 ,  G06F21/608 ,  H04L9/0825 ,  H04L9/14 ,  H04L2209/88 ,  H04N1/4486

摘要： An image encrypting device according to the present invention generates a finally encrypted image sequentially by converting an image of a specified region in an input image with an encryption key, by embedding information obtained by encrypting the encryption key with a public key pairing with the private key of a transmission destination, and by performing pixel value conversion. Then, the encrypted image is transmitted to the transmission destination as a printed matter or via a network. An image decrypting device according to the present invention converts the encrypted image in the form of print data or electronic data into an image, and inputs the image. Next, the image decrypting device extracts a decryption key (the encryption key) from the image of the encryption region by executing a process reverse to the process of the image encrypting device according to the present invention for the encryption region of the encrypted image converted into the image data. Then, the image decrypting device decrypts the original image of the encrypted region by using the decryption key, and restores the entire encrypted image.

摘要翻译： 根据本发明的图像加密装置通过用加密密钥将输入图像中的指定区域的图像转换成通过用与私钥配对的公开密钥加密加密密钥而获得的信息来顺序地生成最终加密图像 的发送目的地，并且通过执行像素值转换。 然后，将加密图像作为打印物或经由网络发送到发送目的地。 根据本发明的图像解密装置将打印数据或电子数据形式的加密图像转换为图像，并输入图像。 接下来，图像解密装置通过执行与根据本发明的图像加密装置的处理相反的处理，从加密区域的图像中提取解密密钥（加密密钥），用于将加密图像的加密区域转换成 图像数据。 然后，图像解密装置通过使用解密密钥解密加密区域的原始图像，并恢复整个加密图像。