Thomson Licensing

Laurent Blondé

Jonathan Kervec

Pascal Bourdon

Didier Doyen

Khaled Sarayeddine

Emmanuel Jolly

Youngshik Yoon

Philippe Robert

Eugene Murphy O'Donnell

Sylvain Thiebaud

Julien Thollot

Philippe Le Roy

Patrick Morvan

Hassane Guermoud

Jürgen Stauder

Luis Montalvo

Didler Doyen

Virginie Hallier

A projector has at least four primary color components controlled to produce a metameric effect image which is not perceptible to the human optical system and is perceptible to a video recording device.

Video recording prevention system

The image is broken down into a breakdown color space. For each broken down source pixel, if a source point Pis used to represent the end of the color source vector OPassociated with said source pixel, component points P, P, . . . , P, . . . , Pare used to represent the ends of the color component vectors OP, OP, . . . , OP, . . . , OPassociated with the component pixels, if a limit sphere of radius Lis defined, centered on the point P, then said breakdown is such that the following applies: PP, PP, PP, . . . , PP&#x2267;K&#xd7;L, with K&#x2267;0.5. The effectiveness of the scrambling is then significantly enhanced.

Image processing method for increasing the blurring of pirated images

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.

Method for processing a video sequence and apparatus implementing said method

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.

Video data processing module furnished with a configurable video processing unit with a single input bus

A colour quality control device adapted for use in a system for colour correction of an image to be reproduced on at least one reproduction device that is calibrated by a reproduction forward transform. The system also comprises a colour correction device adapted to correct at least one colour in the image. The colour quality control device comprises a false contour detection unit that uses information from the reproduction forward transform to decide if a contour in the image is a false contour introduced by the transform. This facilitates the operator's work during colour correction. A system and a method are also provided.

Method, system and device for colour quality control

The invention is directed at least in part to a method of illuminating an imager for projecting images, implementing light-emitting diodes of different colors, the diodes being designed to provide a beam illuminating the imager. According to various embodiments of the invention, for a set of at least one imager, the method includes receiving each image of the set; determining a color base dependent on the set of at least one image, called a secondary color base; and dynamically controlling the diodes according to the secondary color base. The invention also relates to a system implementing the method and a projector comprising such a system.

Method of illuminating a projecting imager, corresponding system and projector

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

Device, system and method for characterizing a colour device

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 () 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.

Device for displaying color images

The invention discloses modification of pixels of an image in such a way that the average of the colors of the pixel in the modified image equals the average of the colors of the pixel in the source image, such that the human perception of the modified image is the same as the source image, while a camcorder will record an unsatisfactory mixture of the modified colors.

Methods of processing and displaying images and display device using the methods

The present invention relates to a device and a method for displaying images. To combat the copying of images by a camcorder in a cinema auditorium, modulating the luminance of the pixels of a pattern around the value to be displayed to a high frequency which makes the pattern invisible to the human eye but which generates artifacts on the sequence filmed by the camcorder is known. According to the invention, it is proposed to temporally modulate the pattern only in the fixed areas (background or indoor scenes) or, where appropriate, the areas with weak movements. Thus, rather than degrading the image in the areas with movement by applying to them the temporal modulation processing, a decision is taken not to temporally modulate the pattern in these critical areas.

Image display device and method

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.

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Thorigne-Fouillard, France

Laurent Blondé