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    METHOD AND SYSTEM FOR SCRAMBLING AND DESCRAMBLING A DIGITAL IMAGE
    1.
    发明公开
    METHOD AND SYSTEM FOR SCRAMBLING AND DESCRAMBLING A DIGITAL IMAGE 审中-公开
    用于数字图像加密方法和系统解密

    公开(公告)号：EP2829053A1

    公开(公告)日：2015-01-28

    申请号：EP13709479.3

    申请日：2013-03-18

    申请人： Nagravision S.A.

    发明人： SARDA, Pierre ,  TRAN, Minh Son ,  DAGAEFF, Thierry

    IPC分类号： H04N1/44 ,  H04N21/2347 ,  H04N7/26 ,  H04N21/2343 ,  H04N21/235

    CPC分类号： H04L9/0816 ,  G09C5/00 ,  H04L2209/24 ,  H04N1/448 ,  H04N1/4486 ,  H04N21/2347 ,  H04N21/4408 ,  H04N21/4621 ,  H04N21/4623 ,  H04N21/8153

    摘要： The present invention refers to a method for scrambling an original digital image (10) into a scrambled image (20) and for descrambling the scrambled image (20) into a reconstructed image (30). In accordance with a certain coding format, the original image (10) is defined by a set of orderly original coefficients (12, 13). These coefficients refer to coding elements arranged in blocks (11) within this image, and/or to parameters of said coding format within a conversion table. The method comprising: a scrambling operation comprising the steps of: - substituting a plurality of the original coefficients (12, 13) by dummy coefficients (12', 13') of the same nature so as to safeguard said coding format, - storing the substituted original coefficients (12, 13) with their respective position, as original data (15) into at least two control objects (CO1, CO2), each control object corresponding to a specific degradation level of the original image (10); and a descrambling operation comprising the steps of: - receiving the scrambled image (20) and at least a part of said control objects (CO1, CO2), - using original data (15) derived from a selection of at least one of said control objects (CO1, CO2), performed on the basis of a user access condition (25), for obtaining the reconstructed image (30) by putting back the original coefficients (12, 13) instead of said dummy coefficients, thanks to their respective position.

    摘要翻译： 接收原始 - ：加扰操作包括以下步骤：用于加扰原始数字图像（10）的成加扰图像（20）和用于加扰的图像（20）解扰成重建图像（30），所述方法包括方法 图像（10），其具有编码格式，该图像被划分成连续块（11）和被存储在所述编码格式作为一组语法元素的（12，13） - 由替换代语法元素的多个（12） 语法元素（12“）具有相同的性质，以保持编码格式， - 所述图像（10）作为原始数据（15）内的存储substituiertem语法元素（12），它们的位置respectivement的值分成至少 两个控制对象（CO1，CO2），每个控制对象对应于原始图像（10）的一个特定的劣化等级; 一个解扰操作包括以下步骤： - 接收经加扰的图像（20）和所述控制对象（CO1，CO2）， - 选择基于用户访问条件的控制对象（CO1，CO2）中的至少一个（25） - 使用所述原始数据（15），将存储在所选择的控制对象/对象（CO1，CO2），用于通过检索每个substituiertem语法元素的respectivement原始值获得重构图像（30）（12“ 12' ”） 它的位置来识别。

    IMAGE ENCRYPTION DEVICE/DECRYPTION DEVICE, IMAGE ENCRYPTION METHOD/DECRYPTION METHOD, AND IMAGE ENCRYPTION PROGRAM/DECRYPTION PROGRAM
    3.
    发明公开
    IMAGE ENCRYPTION DEVICE/DECRYPTION DEVICE, IMAGE ENCRYPTION METHOD/DECRYPTION METHOD, AND IMAGE ENCRYPTION PROGRAM/DECRYPTION PROGRAM 审中-公开
    EINRICHTUNG，VERFAHREN UND PROGRAMM ZURBILDVERSCHLÜSSELUNG/-ENTSCHLÜSSELUNG

    公开(公告)号：EP2343877A1

    公开(公告)日：2011-07-13

    申请号：EP08877517.6

    申请日：2008-10-23

    申请人： Fujitsu Limited

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

    IPC分类号： H04N1/387

    CPC分类号： H04N1/448 ,  G09C1/04

    摘要： In the encryption processes, some constraints are imposed on the size of an encryption field. For example, when the numbers of divided blocks in the height and width dimensions are respectively divided by a preset positive integer, the size of an encryption field is restricted such that the remainder will be 0 (i.e., the numbers of divided blocks are multiples of positive integers preset for the respective height and width) or a number equal to or larger than 1. In the decryption processes that correspond to the encryption processes above, the block positions in the encryption field are detected according to the constraint on the number of blocks of the encrypted image. As the numbers of blocks are restricted in advance in the height and width dimensions at the time of performing encryption, the numbers of blocks that need to be taken into consideration can be reduced at the time of detecting the block positions. As a result, the precision of decryption improves.

    摘要翻译： 在加密过程中，对加密字段的大小施加一些限制。 例如，当高度和宽度尺寸中的分割块的数量分别被预置的正整数分割时，加密字段的大小被限制为使得余数为0（即，分割块的数量是 对于相应的高度和宽度预设的正整数）或等于或大于1的数字。在与上述加密处理相对应的解密处理中，根据对块数量的约束来检测加密字段中的块位置 的加密图像。 由于块的数量在进行加密时的高度和宽度尺寸预先被限制，所以在检测到块位置时可以减少需要考虑的块的数量。 结果，解密精度提高。

    Image protection apparatus, imaging apparatus, and program
    4.
    发明公开
    Image protection apparatus, imaging apparatus, and program 审中-公开
    图像保护设备，成像设备，以及程序

    公开(公告)号：EP1615186A3

    公开(公告)日：2007-11-21

    申请号：EP05014785.9

    申请日：2005-07-07

    申请人： Sony Corporation

    发明人： Hagita, Shoji

    IPC分类号： G08B13/196

    CPC分类号： H04N1/3333 ,  G08B13/19643 ,  G08B13/19663 ,  G08B13/19673 ,  G08B13/1968 ,  G08B13/19686 ,  H04N1/448 ,  H04N2201/33357

    摘要： An image protection apparatus includes (a) a set-state determining unit (3) that determines a set state regarding a protection function for an image, and (b) a protection process unit (5) that, when the protection function is determined by the set-state determining unit to be in a valid state, selectively performs lossless coding of a specified image region of an input image, thereby to perform a conversion to a state making it difficult to verify an image in a portion corresponding to the specified image region. Thereby, the conversion can be performed to the state making it difficult the image verification by a third person. In addition, when posterior verification of an image is necessary, the image can be played back to an original image.

    IMAGE ALIGNMENT
    6.
    发明公开
    IMAGE ALIGNMENT 审中-公开
    图像对齐

    公开(公告)号：EP1649683A1

    公开(公告)日：2006-04-26

    申请号：EP04744554.9

    申请日：2004-07-12

    申请人： Koninklijke Philips Electronics N.V.

    发明人： JOHNSON, Mark, T. ,  TUYLS, Pim, T. ,  KEVENAAR, Thomas, A., M. ,  SCHRIJEN, Geert, J.

    IPC分类号： H04N1/44 ,  H04K1/00

    CPC分类号： G09C5/00 ,  H04N1/3876 ,  H04N1/44 ,  H04N1/448 ,  H04N1/4493

    摘要： An image decryption device (1) comprises a screen (10) on which a decrypted image may be visible. The decrypted image may the combination of two partial images, an encrypted image (A) displayed by a display device (2) and a key image or decrypting image (B) superimposed on the encrypted image by the decryption device. To properly align the encrypted image (A) and the key image (B), the decryption device is provided with sensors (11) capable of sensing the position of the decryption device relative to the display device. Corresponding alignment images (22) may be arranged around the screen (20 of the display device, or may be part of the encrypted image. Manual or automatic alignment may be provided.

    摘要翻译： 图像解密设备（1）包括屏幕（10），解密图像可以在其上可见。 解密图像可以是由显示设备（2）显示的加密图像（A）和由解密设备叠加在加密图像上的密钥图像或解密图像（B）的两个部分图像的组合。 为了正确地对准加密图像（A）和关键图像（B），解密设备设置有能够感测解密设备相对于显示设备的位置的传感器（11）。 相应的对准图像（22）可以布置在显示设备的屏幕（20）周围，或者可以是加密图像的一部分。可以提供手动或自动对准。

    OBJECT AUTHENTICATION USING ENCODED IMAGES DIGITALLY STORED ON THE OBJECT
    10.
    发明公开
    OBJECT AUTHENTICATION USING ENCODED IMAGES DIGITALLY STORED ON THE OBJECT 审中-公开
    OBJEKTAUTHENTIFIZIERUNGÜBERAUF DEM OBJEKT GESPEICHERTE KODIERTE BILDER

    公开(公告)号：EP2100403A2

    公开(公告)日：2009-09-16

    申请号：EP07869014.6

    申请日：2007-12-06

    申请人： Graphic Security Systems Corporation

    发明人： ALASIA, Alfred V. ,  ALASIA, Alfred J. ,  ALASIA, Thomas C. ,  CVETKOVIC, Slobodan

    IPC分类号： H04L9/00

    CPC分类号： H04N1/4493 ,  G06K9/00577 ,  G07C9/00111 ,  G07D7/003 ,  H04N1/32138 ,  H04N1/32144 ,  H04N1/448 ,  H04N2201/3233 ,  H04N2201/327 ,  H04N2201/3274

    摘要： A method of authenticating an object using optically decodable encoded images is presented. The method comprises attaching a digital data storage medium to the object and storing an optically decodable digital encoded image in the data storage medium, The digital encoded image comprises authentication information determinable by decoding the digital encoded image. The method further comprises downloading the digital encoded image from the digital data storage medium and applying a digital decoding algorithm to the captured digital image to establish a decoding result. The decoding result is then compared to object authentication criteria to establish an authentication result.

    摘要翻译： 提出了使用光学可解码的编码图像来认证对象的方法。 该方法包括将数字数据存储介质附加到对象并将光学可解码的数字编码图像存储在数据存储介质中。 数字编码图像包括通过解码数字编码图像可确定的认证信息。 该方法还包括从数字数据存储介质下载数字编码图像，并将数字解码算法应用于所捕获的数字图像以建立解码结果。 然后将解码结果与对象认证标准进行比较以建立认证结果。