Abstract: According to the invention, the video data to be processed and the configuration data are transferred to the module via one and the same data bus. These modules are advantageously chained in series on a common bus which transfers to each module both the configuration data and the video data to be processed. Preferably, dead time or “blanking” periods between two picture frames transmitted on this bus are used in order to insert the configuration data.

Abstract: The present invention relates to an image processing apparatus and device intended to temporally modulate a sequence of source images with a modulation image comprising at least one anti-copy pattern. According to the invention, it is proposed that the modulation image be generated on the basis of the source image to be modulated in such a way as to place the patterns at locations of the image that may hinder the person watching an illicit copy of the video sequence (filmed for example by a camcorder). The modulation image is for example an image of the secondary contours of the image. The patterns are therefore placed in the low-gradient zones of the source image.

Abstract: In the different mapping planes, described by plane coordinates, of the color space in which colors to map are represented, a uniformity testing curve can be found that intersects all mapping trajectories of this mapping plane and, at any intersection of a mapping trajectory with said uniformity testing curve, the gradients calculated in said plane coordinates of the intersecting mapping lines and the first derivation along this uniformity testing of these gradients are continuous. Thank to the invention, colors are better preserved after mapping, even if there are different mapping methods in the same mapping plane.

Abstract: This high dynamic picture transmission system comprises a coding unit able to generate: a standard bitstream coding the pictures in which the luminance of each pixel is coded with a standard dynamic, and at least a second bitstream containing the information necessary to reconstruct the luminance of high dynamic pictures from the coded luminance with a standard dynamic contained in the standard bitstream.

Abstract: A method for characterizing a colour reproduction device. A first output colour measure responding to a first reference input colour value is measured under normal measurement conditions. The measurement conditions are modified and a second output colour measure responding to the first reference input colour value is measured under the modified measurement conditions. A transformation rule, enabling transformation between the second output colour measure and the first output colour measure, is calculated from the first colour value and the second colour value. A first set of output colour measures responding to a set of input colour values is measured under modified measurement conditions, and the first set of output colour measures is converted, using the transformation rule, to a second set of output colour measures. A system and a control device are also provided.

Abstract: The present invention provides a method and system for determining and providing color metadata for a downlink data channel. In accordance with the present invention color metadata is determined such that gamut mapping is defined by a transmitted source gamut which enables adapted mapping that preserves saturation and contrast levels of the source for a downlink data channel. The metadata is then provided to a downlink data channel for color management.

Abstract: The invention relates to a method and device for processing video images aimed at compensating for the defects of display devices. According to the invention, the method is characterized in that it comprises the following steps: correction of a video signal by a specific gamma law associated with a first component from among said horizontal and vertical components of said video signal, first video processing acting on said first component of the corrected video signal, application, to the video signal processed, of an intermediate law effecting the transfer from a space which is linear with respect to the first component to a space which is linear with respect to the other of said components, called the second component, second video processing acting on the second component of the video signal emanating from the previous step, and correction of the video signal processed by a specific inverse gamma law associated with the second component.

Abstract: The present invention relates to a method and a device for displaying images aimed at combating the copying of images by filming during their display, for example by a camcorder in a cinema hall. It is known to modulate the luminance of the pixels of a pattern around the value to be displayed at a high frequency which renders the pattern invisible to the human eye but which generates artefacts on the sequence shot by the camcorder. This pattern is commonly called an anti-copy pattern. According to the invention, it is proposed to increase the hindrance generated by this modulation by varying the amplitude of the modulation of the pixels of the anti-copy pattern as a function of their membership or non-membership in a zone of interest of the sequence.

Abstract: The invention concerns an image display system comprising: a light source emitting an illuminating laser beam, a spatial light modulator controlled by control video signals corresponding to a succession of image frames; a matrix filter consisting of an array of different elementary color filters, illuminated by said illuminating beam and transmitting a spatially color-filtered beam to the spatial light modulator, an image of said filter being produced on an input surface of the spatial light modulator; means for displacing the filter image on the input of the spatial light modulator; and a control device for controlling at least one sequence of displacements of the filter image upon each image frame display.

Abstract: This method determines the displacement of a pixel between a first and a second image, the first image representing, moreover, an object in a first scene taken from given viewpoint, and the second image representing the same object in a second scene, this second scene being obtained from the first scene by moving the object in the first scene and/or by moving the viewpoint of the first scene. The method comprises a definition operation of the colour of at least one point of the object of the second scene according to the position of this point in the first image such that the colour of the pixel of the second image corresponding to this point indicates the position of this pixel in the first image.

Abstract: According to the method, starting from the chromatic components xS, yS of the colour vector to be converted, the components of an intermediate colour vector RINT-CR, GINT-CR, ?INT-CR are-interpolated, whose chromatic components, expressed in the source colour space are: xINT-CR=xS, yINT-CR=yS; starting from the luminance component SS of the colour vector to be converted and from the luminance component ?INT-CR of the intermediate colour vector, the luminance component ?D of the converted colour vector is interpolated; the chromatic components RD, GD of the converted colour vector are calculated from its luminance component ?D and from the components of the intermediate colour vector RINT-CR, GINT-CR, ?INT-CR. The conversion methods of the prior art are substantially improved.

Abstract: A method for addressing cells in devices via an I2C bus is suggested, in which the common addressing scheme is supplemented by a ‘Data Transfer Mode’ byte. The ‘Data Transfer Mode’ byte specifies the number of the address and data bytes to follow the device addressing and thereby allows for orthogonal and scalable addressing of cells inside a device connected to the bus. The method is fully compatible to the existing I2C standard for writing to the slave device. Setting up and terminating a connection between a master and a slave as well as acknowledging receipt of a byte follows the standard.

Abstract: The present invention is in the field of Content protection, most particularly in cinema venues where camcorder acquisition followed by immediate illegal distribution creates important revenue losses for content owners. It is known that anti-camcorder systems using a color modulation can be circumvented by using low shutter speed in the camcorder. Today, the shutter speed is determined automatically by the camcorder as a function of the filmed video source. In automatic configurations, shutter speed self-adapts to either motion, or flicker detection, both of which taking into account brightness variations only. The proposed invention proposes a dual color/brightness modulation to defeat automatic shutter speed adjustment. For example, a color modulation at 50/60 Hz is carried out and a brightness modulation at a higher frequency 100/120 Hz is added to force the camcorder to work at a high shutter speed.

Abstract: The invention discloses a new modulation scheme to prevent illegal copy in movie theaters. None of the existing modulation schemes make the right assumptions to modelize a camcorder device. In such classical schemes, camcorders are always considered as sampling devices without taking into account the effects of shutter speed. The shutter of the camcorder is classically compared to a low-pass filter. As a result, modulation effects can be easily removed by setting up shutter speed to low values (low cutoff frequency). The right mathematical modelization of the shutter effect shows that, in the spectral domain, the behavior of the camcorder is close to a cardinal sine function with a main lobe and sidelobes.

Abstract: The invention proposes methods of processing and displaying images comprising the steps of:—modification of the color (C1) in at least one pixel of an image source; and—calculation of the color of the pixel in the processed images (C3, C4), in such a way that the average of the colors of said pixel in the processed images (C3, C4) is equal to the average of the colors of said pixel in the source image or images (C1). The resulting color of the display of the processed images as regards the human eye is therefore the desired color in the source image or images, whereas a camcorder will record an unsatisfactory mixture of the modified colors.

Abstract: What is proposed is a method for the color correction of digital image data generated by spectral absorption of white light in color filters of a first representation means. Color film material, in particular, is taken into consideration as the first representation means. For this purpose, firstly the primary color values R, G, B of the image data on the color film are detected. Said primary color values R, G, B are corrected in order to generate secondary color values R?, G?, B? which are related to a second representation means, for example a monitor. This correction involves taking account of the absorption of light in secondary densities of the colorants of the film material which form the color filters of the first representation means. For this purpose, a plurality of absorption spectra are generated for different densities of the colorants.

Abstract: This method determines the displacement of a pixel between a first and a second image, the first image representing, moreover, an object in a first scene taken from given viewpoint, and the second image representing the same object in a second scene, this second scene being obtained from the first scene by moving the object in the first scene and/or by moving the viewpoint of the first scene. The method comprises a definition operation of the colour of at least one point of the object of the second scene according to the position of this point in the first image such that the colour of the pixel of the second image corresponding to this point indicates the position of this pixel in the first image.

Abstract: The invention relates to a method and device for processing video images aimed at compensating for the defects of display devices. According to the invention, the method is characterized in that it comprises the following steps: correction of a video signal by a specific gamma law associated with a first component from among said horizontal and vertical components of said video signal, first video processing acting on said first component of the corrected video signal, application, to the video signal processed, of an intermediate law effecting the transfer from a space which is linear with respect to the first component to a space which is linear with respect to the other of said components, called the second component, second video processing acting on the second component of the video signal emanating from the previous step, and correction of the video signal processed by a specific inverse gamma law associated with the second component.

Abstract: The invention relates to a method of illuminating an imager for projecting images, implementing light-emitting diodes of different colours, the diodes being designed to provide a beam illuminating the imager. According to the invention, for a set of at least one image, the method comprises: a step for receiving each image of the set; a step for determining a colour base dependent on the set of at least one image, called a secondary colour base; and a step for dynamically controlling the diodes according to said secondary colour base. The invention also relates to a system implementing the method and a projector comprising such a system.

Abstract: A display device comprises revolving coloured wheels, so as to generate a periodic coloured beam, and an imager which modulates the coloured beam as a function of a received video signal. The coloured beam (8) takes successively at each period a plurality of primary colours in synchronism with the images generated by the imager for each primary colour. By adjustment of the relative position of the coloured wheels, it is possible to modify the hue of the primary colours so as to best match them to the received video signal.