Patent application number | Description | Published |
20080273103 | TECHNIQUES FOR MODIFYING IMAGE FIELD DATA AS A FUNCTION OF RADIUS ACROSS THE IMAGE FIELD - A technique for modifying data of an image, such as can be implemented in a still camera or video recorder in order to correct for defects in its optical and/or electronic systems, includes generating data to modify the image as a function of radial position across it. A variation of the intensity across an image (lens shading) that appears in data from a two-dimensional detector is an example of an application of the technique. In order to make modifications to the data, positions of a two-dimensional raster scan pattern of an image sensor are converted to radial positions and this is then used to generate the modification data. The modification data is generated on the fly, at the same rate as the image data is being acquired, so that the modification takes place without slowing down data transfer from the image sensor. | 11-06-2008 |
20080291447 | Optical Chromatic Aberration Correction and Calibration in Digital Cameras - Methods and the corresponding device are presented for the correction of lateral chromatic aberration within a digital camera or other imaging device, using calibration approaches that do not require previously acquired lens data to effect the correction. An in-camera auto-calibration procedure is performed on the attached lens, such as when a lens is exchanged, and extracts parameters required for chromatic aberration correction, respecting zoom and focus, from one or more captured images. Based on image data extracted as a plurality of channels of a chromatic decomposition of the image, the chromatic aberration information for the lens is extracted. From the chromatic aberration information, the correction factors for the lens are determined. | 11-27-2008 |
20100220216 | Digital Camera with Virtual Memory - A digital camera captures successive first and second images using an image sensor to produce image data, and processes the image data of the successive first and second images. The processing of the second image overlaps processing of the first image in time. The processing of the two images includes mapping locations in a virtual memory space to locations in the memory pages in a physical memory space of the digital camera, and storing information corresponding to the mapped locations in a page table. The digital camera performs operations on the image data of the first and second images stored at specified locations in the virtual memory space, and while performing those operations allocates and de-allocates memory pages in the physical memory space to virtual memory pages in the virtual memory space and updates the page table accordingly. | 09-02-2010 |
20110025889 | TECHNIQUES OF MODIFYING IMAGE FIELD DATA BY EXTRAPOLATION - Techniques for modifying data of an image that can be implemented in a digital camera, video image capturing device and other optical systems are provided to correct for Image image shading variations appearing in data from a two-dimensional photo-sensor. These variations can be caused by imperfect lenses, non-uniform sensitivity across the photo-sensor, and internal reflections within a housing of the optical system, for example. In order to correct for these variations, a small amount of modification data is stored in a small memory within the camera or other optical system, preferably separate correction data for each primary color. Image data from individual pixels are corrected on the fly by interpolating individual pixel corrections from the stored modification data, at the same rate as the image data is being acquired, so that the correction takes place without slowing down data transfer of picture data from the image sensor. | 02-03-2011 |
20110205387 | DETECTING OBJECTS IN AN IMAGE BEING ACQUIRED BY A DIGITAL CAMERA OR OTHER ELECTRONIC IMAGE ACQUISITION DEVICE - The likelihood of a particular type of object, such as a human face, being present within a digital image, and its location in that image, are determined by comparing the image data within defined windows across the image in sequence with two or more sets of data representing features of the particular type of object. The evaluation of each set of features after the first is preferably performed only on data of those windows that pass the evaluation with respect to the first set of features, thereby quickly narrowing potential target windows that contain at least some portion of the object. Correlation scores are preferably calculated by the use of non-linear interpolation techniques in order to obtain a more refined score. Evaluation of the individual windows also preferably includes maintaining separate feature set data for various positions of the object around one axis and rotating the feature set data with respect to the image data for the individual windows about another axis. | 08-25-2011 |
20110242371 | ADVANCED NOISE REDUCTION IN DIGITAL CAMERAS - A noise reduction apparatus is presented that includes groups of one or more serially connected non-linear filter units. Each of the filter unit groups are driven by decimated input image data at a different level of decimation and the output of at least one of these groups serves as one of a plurality of inputs to another group driven at a different decimation level. | 10-06-2011 |
20110317045 | ADVANCED NOISE REDUCTION IN DIGITAL CAMERAS - A noise reduction apparatus for digital cameras is presented that includes groups of one or more connected non-linear filter units. Each of the filter unit groups are driven by decimated input image data at a different level of decimation and the output of at least one of these filter unit groups serves as one of a plurality of inputs to another filter unit group driven at a different decimation level. Filtered image data from one or more filter unit groups is adaptively combined in response to one or more image metrics related to one or more local regional image characteristics. | 12-29-2011 |
20120098996 | OPTICAL CHROMATIC ABERRATION CORRECTION AND CALIBRATION IN DIGITAL CAMERAS - Methods and the corresponding device are presented for the correction of lateral chromatic aberration within a digital camera or other imaging device, using calibration approaches that do not require previously acquired lens data to effect the correction. An in-camera auto-calibration procedure is performed on the attached lens, such as when a lens is exchanged, and extracts parameters required for chromatic aberration correction, respecting zoom and focus, from one or more captured images. Based on image data extracted as a plurality of channels of a chromatic decomposition of the image, the chromatic aberration information for the lens is extracted. From the chromatic aberration information, the correction factors for the lens are determined | 04-26-2012 |
20130034300 | ZERO PASS JPEG BIT RATE CONTROLLER - Embodiments are directed towards compressing an image to substantially a preset file size using statistical information obtained from a single subset of the image and an initial compression of the single subset. A representative subset portion of the image is selected based in part on a clustering analysis of the image. The representative subset is then compressed, in one embodiment, twice, in order to obtain statistics useable for the entire image. A scale factor is then determined that may be used in the quantization and for creating a Bit Rate Control (BRC) curve that represents an amount of accumulated bits per Minimal Codec Unit (MCU). During the compression process, the BRC curve is used to prevent accumulating bits from over shooting a final preset file size target. | 02-07-2013 |
20130128071 | DETECTING OBJECTS IN AN IMAGE BEING ACQUIRED BY A DIGITAL CAMERA OR OTHER ELECTRONIC IMAGE ACQUISITION DEVICE - The likelihood of a particular type of object, such as a human face, being present within a digital image, and its location in that image, are determined by comparing the image data within defined windows across the image in sequence with two or more sets of data representing features of the particular type of object. The evaluation of each set of features after the first is preferably performed only on data of those windows that pass the evaluation with respect to the first set of features, thereby quickly narrowing potential target windows that contain at least some portion of the object. Correlation scores are preferably calculated by the use of non-linear interpolation techniques in order to obtain a more refined score. Evaluation of the individual windows also preferably includes rotating the feature set data with respect to the image data for the individual windows about another axis. | 05-23-2013 |
20130232347 | METHOD AND APPARATUS FOR DYNAMIC POWER MANAGEMENT - An integrated circuit (IC) includes a first power supply node that is arranged to receive a first power supply signal. The IC also includes process detection circuits. Each process detection circuit provides a process detection output signal such that a value associated with the process detection output signal is a function of process variation at a location of the process detection circuit outputting the process detection signal. The IC also includes a processing unit that executes the processor-executable instructions to provide at least one voltage control signal, based, at least in part, on the process detection signals. The voltage control signal(s) include a first voltage control signal is associated with a target voltage for the first power supply signal. | 09-05-2013 |