Patent application number | Description | Published |
20090052728 | Method and device for displaying images - 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. | 02-26-2009 |
20090150583 | Video data processing module furnished with a configurable video processing unit with a single input bus - 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. | 06-11-2009 |
20090161018 | Video picture display method to reduce the effects of blurring and double contours and device implementing this method - The present invention relates to a video picture display method that aims to reduce the effects of blurring and multiple contours when the picture display frequency is doubled. According to the invention, for each source video picture, a video level dissymmetry is created between the two pictures from the source video picture after doubling the frequency in the areas in motion of the source video picture. | 06-25-2009 |
20090167936 | Video picture format conversion method and corresponding device - The present invention can be implemented in a video coder or decoder or directly in any type of display device. According to the invention, a distance representative of the edge orientation in the input picture is calculated, for at least one point situated inside a zone delimited by a first set of neighbouring pixels of the input picture, it is calculated independently from the grid of pixels of the output picture. For at least one pixel of the output picture situated in this zone, a second set of pixels is determined in the input picture from the distance and the position of said pixel of the output picture in this zone. The value of this output pixel is then determined from the value of the pixels of said second set of pixels. This method enables a reduction in the number of calculations for this format conversion. | 07-02-2009 |
20090207304 | Method for generating distances representative of the edge orientations in a video picture, corresponding device and use of the method for deinterlacing or format conversion - The distances representative of the edge orientation at a current points of a video picture generated are particularly used for the deinterlacing or format conversion of video pictures. It can be implemented in a video coder or decoder. According to the invention, the distances representative of the edge orientation calculated are filtered with a conditional median filter applied to a window of p by q distances. This filter only takes into account the distances of points for which the local gradient module of the video components is greater than a threshold. | 08-20-2009 |
20090251613 | Method for detecting scene change in a video picture sequence - The method comprises the following steps:
| 10-08-2009 |
20090316784 | Device for generating an interpolated frame - The present invention is situated within the frame or video processing domain and more particularly in the domain of video interpolation. It relates to a device for generating an interpolated frame from source frames temporarily surrounding it. This device comprises motion estimation means, motion compensated interpolation means, linear interpolation means, means for mixing the frame produced by the motion compensated interpolation means with the frame produced by the linear interpolation means. According to the invention, the mixing coefficients assigned to these two frames depend on the displaced frame difference and/or the frame difference between the source frames surrounding this interpolated frame and/or estimated motion vectors. | 12-24-2009 |
20100026613 | Methods for Sequential Color Display by Modulation of Pulses - Each color image is decomposed into at least one series of at least three successive primary images of different primary colors which are successively displayed by modulating the activation duration of the pixels of an imaging device. According to the invention, the distribution of the pixel activation phases in the three successive subframes is contracted: the pixel activation periods of the first primary image are shifted toward the end of the subframe of this first image, and, during the subframe of the third primary image, the pixel activation periods of this third primary image are shifted toward the beginning of the subframe of this third image. Color break-up faults are thus advantageously reduced. | 02-04-2010 |
20100027968 | Method and device for processing source pictures to generate aliasing - The invention concerns a method for processing a sequence of source pictures to generate artifacts due to aliasing when these source pictures are captured by a video capturing device. This method comprises a first time modulation step for modulating temporally at a first modulation frequency the brightness of pixels of each picture of the sequence around a brightness to be displayed for said picture. According to an important feature of the invention, the method further comprises a second time modulation step for modulating temporally at a second modulation frequency different from the first modulation frequency the brightness of pixels of each picture of the sequence around a brightness value to be displayed for said picture, the first and second modulation frequencies being determined in order not to be visible to the human eye and contributing to generate aliasing artifact at a predetermined aliasing frequency. | 02-04-2010 |
20100246953 | Method for detection of film mode or camera mode - The present invention relates to a method for detection of film mode or camera mode of a video sequence. This detection is carried out using histograms of video levels of frames of the video sequence. Difference histograms are calculated then compared with each other so as to generate difference parameters for each video frame of the sequence. The pattern formed by these difference parameters is then compared with predetermined patterns to deduce the mode, film or camera, of the sequence. The advantage of this method is that it requires just small memory resources for its implementation and can therefore be implanted in an FPGA circuit. | 09-30-2010 |
20110254998 | METHOD AND DEVICE TO CAPTURE IMAGES BY EMULATING A MECHANICAL SHUTTER - To capture an image, the image sensing period of this image is subdivided into a plurality of successive illumination periods, and the value which is assigned to each pixel to capture the image is the sum of the integrals of intensity of illumination of this pixel over each of said successive illumination periods. According to the invention, this sum is weighted by an apodization function in order to emulate a mechanical shutter. Temporal aliasing issues and temporal ringing artifacts of digital imaging are prevented or at least limited. | 10-20-2011 |
20120113152 | DEVICE FOR DISPLAYING IMAGES COMPRISING TWO MODULATION STAGES - Device comprising:
| 05-10-2012 |
20130002810 | OUTLIER DETECTION FOR COLOUR MAPPING - A method and an arrangement for an improved outlier detection for colour mapping are recommended, wherein a neighborhood of a partially colour compensated test-image by comparing the initially corrected test-image with a reference image in a neighborhood comparator is used for outlier detection and not outlier detection of at least two images for colour mapping. | 01-03-2013 |
20150063691 | METHOD AND DEVICE FOR PROCESSING OF NON-ALIGNED IMAGES AND CORRESPONDING COMPUTER PROGRAMME - The invention relates to a method for image processing implementing a first step of alignment of at least two images representative of a same scene and having different colours, known as source image and target image respectively, delivering a first aligned image. | 03-05-2015 |