Patent application number | Description | Published |
20090279607 | Method and apparatus for video coding - In uniform superposition of two predictions toward a weighted superposition, such as in coding B frames, weighting is based on reliability of a reference picture used for determination of the prediction. Since there is a relationship between the reliability and the respective quantization parameter, coupling to the quantization parameter that is also known in the receiver also can be effected advantageously. | 11-12-2009 |
20100008594 | METHOD FOR CORRECTING A QUANTIZED DATA VALUE AND ASSOCIATED DEVICE - Where a quantized data value is produced by a first quantization of an input data value, followed by a first inverse quantization and subsequently by a second quantization and the first quantization has first quantization intervals and the second quantization has second quantization intervals, third quantization intervals are generated by displacing interval boundaries of the second quantization intervals, respectively, to the next interval boundaries of the first quantization intervals. A third reconstruction value is determined for the third quantization intervals such that the third reconstruction value lies within the associated third quantization intervals. A corrected data value is generated by a third inverse quantization of the quantized data value and the third inverse quantization is affirmed by the third quantization intervals containing the associated third reconstruction value. | 01-14-2010 |
20110051808 | METHOD AND SYSTEM FOR TRANSCODING REGIONS OF INTERESTS IN VIDEO SURVEILLANCE - A method and a system for spatial scalable region of interest transcoding of JPEG2000 coded video frames for video surveillance systems are shown. Based on a user defined ROI the method transcodes HD frames into images in moderate resolution with a ROI in HD resolution. | 03-03-2011 |
20120148103 | METHOD AND SYSTEM FOR AUTOMATIC OBJECT DETECTION AND SUBSEQUENT OBJECT TRACKING IN ACCORDANCE WITH THE OBJECT SHAPE - A method and system for automatic object detection and subsequent object tracking in accordance with the object shape in digital video systems having at least one camera for recording and transmitting video sequences. In accordance with the method and system, an object detection algorithm based on a Gaussian mixture model and expanded object tracking based on Mean-Shift are combined with each other in object detection. The object detection is expanded in accordance with a model of the background by improved removal of shadows, the binary mask generated in this way is used to create an asymmetric filter core, and then the actual algorithm for the shape-adaptive object tracking, expanded by a segmentation step for adapting the shape, is initialized, and therefore a determination at least of the object shape or object contour or the orientation of the object in space is made possible. | 06-14-2012 |
20130063622 | IMAGE SENSOR AND METHOD OF CAPTURING AN IMAGE - A better compromise between the dynamic range, the spatial resolution, the implementation outlay and the image quality is achieved if different subdivisions of the exposure interval into accumulation intervals are performed for different pixel sensors or pixels. In the event of more than one accumulation interval per exposure interval, the values detected in the accumulation intervals are summed to obtain the respective pixel value. Since the exposure effectively continues to take place for all pixels over the entire exposure interval, no impairment of the image quality arises, or no artifacts arise in image movements. All pixels undergo the same image blur on account of the movement. The additional hardware outlay compared with commercially available pixel sensors is either entirely non-existent or can be kept very small, depending on the implementation. Moreover, a reduction in the spatial resolution is not necessary since the pixels contribute equally to the image capturing. | 03-14-2013 |
20140286589 | METHOD FOR CODING A SEQUENCE OF DIGITAL IMAGES - A method codes a sequence of digital images, each image having the same image format and including a number of pixels with assigned pixel values. Motion parameters between first and second images are determined, where based on said motion parameters a motion compensation is performed for coding the sequence of images, where said motion parameters are included in the coded sequence of images. The motion parameters between a first image and a second image include a scalar field having scalar values for a plurality of image positions in the image format. The scalar field is determined such that gradient vectors derived from the scalar field correspond to motion vectors for the motion compensation. | 09-25-2014 |
20140369414 | METHOD FOR PROCESSING AN IMAGE SEQUENCE AND TESTER FOR A CAR - A method identifies motion in an image sequence, which method involves an image processing device ascertaining a change of position of image features in a current image in respect of a reference image. In the method there is a paired association of corresponding image features, one of which can be found in the current image and one of which can be found in the reference image. Model parameters a determined, which describe the change of position for a motion model on the basis of the image features which are associated with one another. A static region is ascertained for the current image, in which static region the change of position of the image contents contained therein is smaller than a predetermined amount, and the model parameters are determined by using only image features which can be found outside the at least one static region. | 12-18-2014 |
20150334417 | Coding a Sequence of Digital Images - A method is provided for coding a sequence of digital images, wherein the method uses a number of prediction modes for predicting values of pixels in the images based on reconstructed values of pixels in image areas processed previously, where a prediction error between predicted values and the original values of pixels is processed for generating the coded sequence of digital images. | 11-19-2015 |