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    • 6. 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。
    • 7. 发明授权
    • Display method and device for reducing blurring effects
    • 显示减少模糊效果的方法和装置
    • US08031964B2
    • 2011-10-04
    • US11794859
    • 2005-12-13
    • Thierry BorelDidier Doyen
    • Thierry BorelDidier Doyen
    • G06K9/40G06F3/038G09G3/36
    • G09G3/3648G09G3/2014G09G2310/0259G09G2320/0261
    • The present invention relates to a display method and device for improving the luminous efficiency of a matrix display using a pulse-width modulation, or PWM, technique. According to the invention, in order to reduce the blurring effect, the display method comprises the following steps: —detecting the moving object contours within said sequence of video images, —modifying, for each image of said sequence and each contour detected, the gray level of at least one pixel adjacent to said contour by assigning to it an intermediate level in the range between its initial gray level and that of the other pixel adjacent to said contour, and—displaying said modified image sequence. Application to matrix displays comprising a LCOS, OLED or DMD valve array.
    • 本发明涉及使用脉冲宽度调制或PWM技术提高矩阵显示的发光效率的显示方法和装置。 根据本发明,为了减少模糊效果,显示方法包括以下步骤: - 检测所述视频图像序列内的运动对象轮廓, - 对于所述序列的每个图像和检测到的每个轮廓,修改灰色 通过向其分配在其初始灰度级与与所述轮廓相邻的另一个像素的初始灰度级之间的范围内的中间级别,并且显示所述修改的图像序列,与所述轮廓相邻的至少一个像素的级别。 应用于包括LCOS,OLED或DMD阀阵列的矩阵显示器。
    • 9. 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。
    • 10. 发明授权
    • Image processing method for improving the contrast in a digital display panel
    • 用于改善数字显示面板中的对比度的图像处理方法
    • US07528849B2
    • 2009-05-05
    • US10840184
    • 2004-05-06
    • Thierry BorelDidier Doyen
    • Thierry BorelDidier Doyen
    • G09G5/10
    • G09G3/3406G09G3/2007G09G3/36G09G2320/02G09G2320/0646G09G2320/066G09G2340/0428G09G2360/16
    • The invention relates to a method for processing an image displayed by a display device comprising at least one light source and one light valve. It comprises the following steps: applying a compression factor C to the grey levels of the image video signal that are higher than a threshold value NG1, the said threshold value being lower than the peak grey level value (NGmax) of the image video signal, adjusting the luminance of the light produced by the light source to the luminance value corresponding to the peak grey level (NG′max) of the image after compression, multiplying the video signal delivered to the light valve by an expansion factor D equal to the ratio of the peak grey level of the image before compression (NGmax) over the peak grey level of the image after compression (NG′max).
    • 本发明涉及一种用于处理由包括至少一个光源和一个光阀的显示装置显示的图像的方法。 它包括以下步骤:将压缩因子C应用于高于阈值NG1的图像视频信号的灰度级,所述阈值低于图像视频信号的峰值灰度值(NGmax) 将由光源产生的光的亮度调节为对应于压缩后的图像的峰值灰度级(NG'max)的亮度值,将传递给光阀的视频信号乘以等于比率的扩展因子D 压缩后的图像的峰值灰度级(NGmax)超过压缩后的图像的灰度级(NG'max)。