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    • 3. 发明授权
    • Method for selecting image pixels to watermark and watermarking method using this selection
    • 使用此选择选择图像像素到水印和水印方法的方法
    • US08045755B2
    • 2011-10-25
    • US12157468
    • 2008-06-11
    • Jean-Ronan VigourouxPascal BourdonDidier Doyen
    • Jean-Ronan VigourouxPascal BourdonDidier Doyen
    • G06K9/00G09G5/02
    • H04N9/3182G06T1/0028G06T2201/0051H04N1/32309H04N1/54H04N5/913H04N2005/91335H04N2005/91392
    • This invention relates to a method to select, in an input image, pixels that can be watermarked by replacing their colour by a metameric colour. It comprises the following steps: correct the input image by applying a predetermined gamma law, convert the input image into a ‘metameric’ image in which the colours of the input image pixels are replaced by metameric colours, simulate the capture of the input image and of the metameric image by a camcorder in order to generate respectively a captured input image and a captured metameric image, determine, in a colour space and for each pixel of the input image, the distance between the colour of said pixel in the captured input image and in the captured metameric image, and select the pixels of the input image for which the distance is greater than a threshold. The invention also concerns a watermarking method based on metamerism.
    • 本发明涉及一种在输入图像中选择可通过用同色异色替换其颜色而被加水印的像素的方法。 它包括以下步骤:通过应用预定的伽马定律来校正输入图像,将输入图像转换成其中输入图像像素的颜色被同色异色替代的“同位体”图像,模拟输入图像的捕获, 通过摄像机分别生成同色异体图像,以分别产生捕获的输入图像和捕获的同色异体图像,在颜色空间和输入图像的每个像素中确定捕获的输入图像中的所述像素的颜色之间的距离 并且在捕获的同色异体图像中,并且选择距离大于阈值的输入图像的像素。 本发明还涉及基于同色异体的水印方法。
    • 5. 发明授权
    • Method and device for processing a sequence of source pictures
    • 用于处理源图像序列的方法和装置
    • US08094286B2
    • 2012-01-10
    • US12312968
    • 2007-12-04
    • Pascal BourdonSylvain ThiebaudDidier Doyen
    • Pascal BourdonSylvain ThiebaudDidier Doyen
    • H03L7/00
    • H04N5/913H04N2005/91392
    • The invention relates to a method for combating the copying of source pictures by means of a camera while they are being displayed, for example using a camcorder in a movie theatre. To this end, it is known, in classical projection systems, to modulate by a carrier wave the brightness of some pixels of the pictures. The frequency of the carrier wave is usually constant and generally half the refresh frequency. The main problem with such systems is that once a pirate has figured out what the modulation frequency is, he can configure his camcorder shutter to filter out this frequency and bypass the anti-camcorder method. According to the invention, the frequency of the carrier is changed at least once throughout the displaying of the sequence pictures or the movie, to defeat all camcorders standards (PAL/NTSC) and shutter configurations.
    • 本发明涉及一种用于在例如使用电影院中的摄像机来显示的同时通过照相机来对源图像进行复制的方法。 为此,在经典投影系统中,通过载波调制图像的某些像素的亮度是已知的。 载波的频率通常是恒定的,通常是刷新频率的一半。 这种系统的主要问题是,一旦盗版者了解了调制频率,他就可以配置摄像机快门来滤除这个频率,并绕过反摄像机的方法。 根据本发明,在整个序列图像或电影的显示期间,载波的频率至少改变一次,以抵消所有摄像机标准(PAL / NTSC)和快门配置。
    • 6. 发明申请
    • METHOD AND DEVICE FOR PROCESSING A SEQUENCE OF SOURCE PICTURES
    • 用于处理源图像序列的方法和装置
    • US20100053431A1
    • 2010-03-04
    • US12312968
    • 2007-12-04
    • Pascal BourdonSylvain ThiebaudDidier Doyen
    • Pascal BourdonSylvain ThiebaudDidier Doyen
    • H03L7/00
    • H04N5/913H04N2005/91392
    • The invention relates to a method for combating the copying of source pictures by means of a camera while they are being displayed, for example using a camcorder in a movie theatre. To this end, it is known, in classical projection systems, to modulate by a carrier wave the brightness of some pixels of the pictures. The frequency of the carrier wave is usually constant and generally half the refresh frequency. The main problem with such systems is that once a pirate has figured out what the modulation frequency is, he can configure his camcorder shutter to filter out this frequency and bypass the anti-camcorder method. According to the invention, the frequency of the carrier is changed at least once throughout the displaying of the sequence pictures or the movie, to defeat all camcorders standards (PAL/NTSC) and shutter configurations.
    • 本发明涉及一种用于在例如使用电影院中的摄像机来显示的同时通过照相机来对源图像进行复制的方法。 为此,在经典投影系统中,通过载波调制图像的某些像素的亮度是已知的。 载波的频率通常是恒定的,通常是刷新频率的一半。 这种系统的主要问题是,一旦盗版者了解了调制频率,他就可以配置摄像机快门来滤除这个频率,并绕过反摄像机的方法。 根据本发明,在整个序列图像或电影的显示期间,载波的频率至少改变一次,以抵消所有摄像机标准(PAL / NTSC)和快门配置。
    • 8. 发明授权
    • Method of processing images to combat copying
    • 处理图像以打击复制的方法
    • US08428299B2
    • 2013-04-23
    • US12455546
    • 2009-06-03
    • Sylvain ThiebaudPascal BourdonDidier Doyen
    • Sylvain ThiebaudPascal BourdonDidier Doyen
    • G06K9/00
    • G06T1/0028G06T1/0085G06T2201/0051G06T2201/0083H04N5/913H04N2005/91392
    • The invention relates to a method of processing source images which is intended to combat their copying by a camcorder or a camera during their display, for example in a cinema hall. The source image sequence represents a scene. According to the invention, the method comprises the following steps: detection, in the said scene, of at least one zone corresponding to an object of the scene, selection of the entirety of the pixels of the said at least one zone in at least one source image of the sequence; and processing of the said at least one source image to modify the color of the selected pixels or the spectral composition of the light emitted by the selected pixels so that the perceived color of the selected pixels is unchanged in the processed source image with respect to the source image.
    • 本发明涉及一种处理源图像的方法,该图像旨在在摄像机或相机的显示期间例如在电影厅中与其复制。 源图像序列表示场景。 根据本发明,该方法包括以下步骤:在所述场景中检测与场景的对象对应的至少一个区域,在至少一个区域中选择所述至少一个区域的整个像素 源图像的序列; 以及处理所述至少一个源图像以修改所选择的像素的颜色或由所选择的像素发射的光的光谱组成,使得所处理的源图像中所选择的像素的感知颜色相对于 源图像。