Patents by Inventor Alexandru Drimbarean
Alexandru Drimbarean has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8577186Abstract: A forward interpolation approach is disclosed for enabling a second version of an image to be constructed from a first version of the image. According to one implementation, an input pixel from the first version of the image is forward mapped to the second version of the image to determine a set of candidate pixels that may be affected by the input pixel. Each candidate pixel is then backward mapped to the first version of the image to determine whether they are actually affected by the input pixel. For each candidate pixel that is actually affected by the input pixel, a pixel value is determined for that candidate pixel based at least in part upon the pixel value of the input pixel. By using this forward and backward mapping technique, forward interpolation can be implemented quickly and efficiently.Type: GrantFiled: February 14, 2011Date of Patent: November 5, 2013Assignee: DigitalOptics Corporation Europe LimitedInventors: Oded Gigushinski, Shahar Kovalsky, Noy Cohen, Yariv Oz, Daniel Cohen, Poitr Stec, Alexandru Drimbarean
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Publication number: 20130278784Abstract: An adaptive motion estimation and deblurring technique for acquired digital images includes acquiring multiple digital images with a moving digital image acquisition device that includes an image sensor, including a relatively sharp, underexposed reference image and a blurred image. An initial approximate point spread function (PSF) is estimated corresponding to the moving of the device. A different DC offset point is determined and a second PSF is calculated based on the different DC offset point.Type: ApplicationFiled: January 7, 2013Publication date: October 24, 2013Inventors: Felix Albu, Alexandru Drimbarean, Adrian Zamfir, Corneliu Florea, Peter Corcoran
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Publication number: 20130236094Abstract: A method and apparatus for providing image processing. For one embodiment of the invention, an image processing apparatus is arranged to process a first relatively underexposed and sharp image of a scene, and a second relatively well exposed and blurred image, nominally of the same scene, the first and second images being derived from respective image sources. The apparatus provides a portion of the relatively first underexposed image as an input signal to an adaptive filter; and a corresponding portion of the second relatively well exposed image as a desired signal to the adaptive filter. The adaptive filter produces an output signal from the input signal and the desired signal; and an image generator constructs a first filtered image from the output signal, relatively less blurred than the second image.Type: ApplicationFiled: February 20, 2013Publication date: September 12, 2013Applicant: DIGITALOPTICS CORPORATION EUROPE LIMITEDInventors: Felix Albu, Eran Steinberg, Peter Corcoran, Alexandru Drimbarean, Adrian Zamfir, Corneliu Florea, Vlad Poenaru
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Patent number: 8532380Abstract: Methods and systems for detecting and correcting chromatic aberration and purple fringing are disclosed. Chromatic aberration can be addressed by separating an image into color planes and then adjusting these to reduce chromatic aberration by using a specific calibration image (calibration chart) as an empirical method to calibrate the image acquisition device. Purple fringing can be corrected by initially addressing color aberration resulting from the lateral chromatic aberration (LCA). The LCA is first removed and then the correction is extended to purple fringing. A discovery is relied upon that the purple fringing is created in the direction of the chromatic aberration and is more pronounced in the direction of the chromatic aberration.Type: GrantFiled: July 22, 2011Date of Patent: September 10, 2013Assignee: DigitalOptics Corporation Europe LimitedInventors: Piotr Stec, Larry Murray, Alexandru Drimbarean
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Publication number: 20130229542Abstract: A method and apparatus for providing image processing. For one embodiment of the invention, an image processing apparatus is arranged to process a first relatively underexposed and sharp image of a scene, and a second relatively well exposed and blurred image, nominally of the same scene, the first and second images being derived from respective image sources. The apparatus provides a portion of the relatively first underexposed image as an input signal to an adaptive filter; and a corresponding portion of the second relatively well exposed image as a desired signal to the adaptive filter. The adaptive filter produces an output signal from the input signal and the desired signal; and an image generator constructs a first filtered image from the output signal, relatively less blurred than the second image.Type: ApplicationFiled: February 20, 2013Publication date: September 5, 2013Applicant: DIGITALOPTICS CORPORATION EUROPE LIMITEDInventors: Felix Albu, Eran Steinberg, Peter Corcoran, Alexandru Drimbarean, Adrian Zamfir, Corneliu Florea, Vlad Poenaru
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Patent number: 8520093Abstract: An image acquisition device includes a flash and optical system for capturing digital images. A face tracker identifies face regions within a series of one or more relatively low resolution reference images, and predicts face regions within a main digital image. A face analyzer determines one or more partial face regions within the one or more face regions each including at least one eye. A red-eye filter modifies an area within the main digital image indicative of a red-eye phenomenon based on an analysis of one or more partial face regions within the one or more face regions identified and predicted by the face tracker.Type: GrantFiled: August 31, 2009Date of Patent: August 27, 2013Assignee: DigitalOptics Corporation Europe LimitedInventors: Florin Nanu, Eran Steinberg, Peter Corcoran, Alexei Pososin, Petronel Bigioi, Alexandru Drimbarean, Stefan Petrescu, Mihnea Gangea, Adrian Capata, Mihai Ciuc, Adrian Zamfir
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Patent number: 8520082Abstract: An image acquisition sensor of a digital image acquisition apparatus is coupled to imaging optics for acquiring a sequence of images. Images acquired by the sensor are stored. A motion detector causes the sensor to cease capture of an image when the degree of movement in acquiring the image exceeds a threshold. A controller selectively transfers acquired images for storage. A motion extractor determines motion parameters of a selected, stored image. An image re-constructor corrects the selected image with associated motion parameters. A selected plurality of images nominally of the same scene are merged and corrected by the image re-constructor to produce a high quality image of the scene.Type: GrantFiled: October 19, 2010Date of Patent: August 27, 2013Assignee: DigitalOptics Corporation Europe LimitedInventors: Peter Corcoran, Eran Steinberg, Petronel Bigioi, Alexandru Drimbarean, Adrian Zamfir, Corneliu Florea
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Patent number: 8508652Abstract: An autofocus method includes acquiring multiple images each having a camera lens focused at a different focus distance. A sharpest image is determined among the multiple images. Horizontal, vertical and/or diagonal integral projection (IP) vectors are computed for each of the multiple images. One or more IP vectors of the sharpest image is/are convoluted with multiple filters of different lengths to generate one or more filtered IP vectors for the sharpest image. Differences are computed between the one or more filtered IP vectors of the sharpest image and one or more IP vectors of at least one of the other images of the multiple images. At least one blur width is estimated between the sharpest image and the at least one of the other images of the multiple images as a minimum value among the computed differences over a selected range. The steps are repeated one or more times to obtain a sequence of estimated blur width values. A focus position is adjusted based on the sequence of estimated blur width values.Type: GrantFiled: February 3, 2011Date of Patent: August 13, 2013Assignee: DigitalOptics Corporation Europe LimitedInventors: Felix Albu, Vlad Poenaru, Alexandru Drimbarean
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Patent number: 8509498Abstract: An image processing apparatus for tracking faces in an image stream iteratively receives an acquired image from the image stream including one or more face regions. The acquired image is sub-sampled at a specified resolution to provide a sub-sampled image. An integral image is then calculated for a least a portion of the sub-sampled image. Fixed size face detection is applied to at least a portion of the integral image to provide a set of candidate face regions. Responsive to the set of candidate face regions produced and any previously detected candidate face regions, the resolution is adjusted for sub-sampling a subsequent acquired image.Type: GrantFiled: September 26, 2011Date of Patent: August 13, 2013Assignee: DigitalOptics Corporation Europe LimitedInventors: Stefan Petrescu, Peter Corcoran, Eran Steinberg, Petronel Bigioi, Alexandru Drimbarean
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Patent number: 8509496Abstract: A method of tracking a face in a reference image stream using a digital image acquisition device includes acquiring a full resolution main image and an image stream of relatively low resolution reference images each including one or more face regions. One or more face regions are identified within two or more of the reference images. A relative movement is determined between the two or more reference images. A size and location are determined of the one or more face regions within each of the two or more reference images. Concentrated face detection is applied to at least a portion of the full resolution main image in a predicted location for candidate face regions having a predicted size as a function of the determined relative movement and the size and location of the one or more face regions within the reference images, to provide a set of candidate face regions for the main image.Type: GrantFiled: November 16, 2009Date of Patent: August 13, 2013Assignee: DigitalOptics Corporation Europe LimitedInventors: Eran Steinberg, Peter Corcoran, Petronel Bigiol, Alexei Pososin, Alexandru Drimbarean, Florin Nanu, Stefan Petrescu
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Patent number: 8417055Abstract: A method and apparatus for providing image processing. For one embodiment of the invention, an image processing apparatus is arranged to process a first relatively underexposed and sharp image of a scene, and a second relatively well exposed and blurred image, nominally of the same scene, the first and second images being derived from respective image sources. The apparatus provides a portion of the relatively first underexposed image as an input signal to an adaptive filter; and a corresponding portion of the second relatively well exposed image as a desired signal to the adaptive filter. The adaptive filter produces an output signal from the input signal and the desired signal; and an image generator constructs a first filtered image from the output signal, relatively less blurred than the second image.Type: GrantFiled: September 18, 2007Date of Patent: April 9, 2013Assignee: DigitalOptics Corporation Europe LimitedInventors: Felix Albu, Eran Steinberg, Alexandru Drimbarean, Corneliu Florea, Adrian Zamfir, Peter Corcoran, Vlad Poenaru
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Patent number: 8379917Abstract: A technique is provided for recognizing faces in an image stream using a digital image acquisition device. A first acquired image is received from an image stream. A first face region is detected within the first acquired image having a given size and a respective location within the first acquired image. First faceprint data uniquely identifying the first face region are extracted along with first peripheral region data around the first face region. The first faceprint and peripheral region data are stored, and the first peripheral region data are associated with the first face region. The first face region is tracked until a face lock is lost. A second face region is detected within a second acquired image from the image stream. Second peripheral region data around the second face region are extracted. The second face region is identified upon matching the first and second peripheral region data.Type: GrantFiled: October 2, 2009Date of Patent: February 19, 2013Assignee: DigitalOptics Corporation Europe LimitedInventors: Petronel Bigioi, Gabriel Costache, Alexandru Drimbarean, Peter Corcoran
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Publication number: 20130010138Abstract: A method operable in a digital image acquisition system having no photographic film is provided. The method comprises receiving a relatively low resolution image of a scene from an image stream, wherein the scene potentially includes one or more faces. At least one high quality face classifier is applied to the image to identify relatively large and medium sized face regions and at least one relaxed face classifier is applied to the image to identify relatively small sized face regions. A relatively high resolution image of nominally the same scene is received and at least one high quality face classifier is applied to the identified small sized face regions in the higher resolution version of said image.Type: ApplicationFiled: April 9, 2012Publication date: January 10, 2013Inventors: Petronel Bigioi, Alexei Pososin, Mihnea Gangea, Stefan Petrescu, Peter Corcoran, Alexandru Drimbarean, Adrian Zamfir, Corneliu Florea
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Patent number: 8351726Abstract: An adaptive motion estimation and deblurring technique for acquired digital images includes acquiring multiple digital images with a moving digital image acquisition device that includes an image sensor, including a relatively sharp, underexposed reference image and a blurred image. Anb initial approximate point spread function (PSF) is estimated corresponding to the moving of the device. A different DC offset point is determined and a second PSF is calculated based on the different DC offset point.Type: GrantFiled: June 21, 2010Date of Patent: January 8, 2013Assignee: DigitalOptics Corporation Europe LimitedInventors: Felix Albu, Alexandru Drimbarean, Adrian Zamfir, Corneliu Florea, Peter Corcoran
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Patent number: 8339462Abstract: Methods and systems for detecting and correcting chromatic aberration and purple fringing are disclosed. Chromatic aberration can be addressed by separating an image into color planes and then adjusting these to reduce chromatic aberration by using a specific calibration image (calibration chart) as an empirical method to calibrate the image acquisition device. Purple fringing can be corrected by initially addressing color aberration resulting from the lateral chromatic aberration (LCA). The LCA is first removed and then the correction is extended to purple fringing. A discovery is relied upon that the purple fringing is created in the direction of the chromatic aberration and is more pronounced in the direction of the chromatic aberration.Type: GrantFiled: January 27, 2009Date of Patent: December 25, 2012Assignee: DigitalOptics Corporation Europe LimitedInventors: Piotr Stec, Larry Murray, Alexandru Drimbarean
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Patent number: 8340462Abstract: A forward interpolation approach is disclosed for enabling a second version of an image to be constructed from a first version of the image. According to one implementation, pixels from the first version of the image are mapped to pixels in the second version of the image, and pixel values are determined for the corresponding pixels in the second version of the image. In one implementation, the pixel mapping is performed using a lookup table and linear approximation. Performing the pixel mapping in this manner enables computations to be simplified and cost and gate count to be reduced.Type: GrantFiled: February 14, 2011Date of Patent: December 25, 2012Assignee: DigitalOptics Corporation Europe LimitedInventors: Oded Gigushinski, Shahar Kovalsky, Noy Cohen, Yariv Oz, Poitr Stec, Alexandru Drimbarean, Corneliu Zaharia, Mihai Constantine Munteanu
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Patent number: 8330831Abstract: A digital image processing technique gathers visual meta data using a reference image. A main image and one or more reference images are captured on a hand-held or otherwise portable or spatial or temporal performance-based image capture device. The reference images are analyzed based on predefined criteria in comparison to the main image. Based on said analyzing, supplemental meta data are created and added to the main image at a digital data storage location.Type: GrantFiled: June 16, 2008Date of Patent: December 11, 2012Assignee: DigitalOptics Corporation Europe LimitedInventors: Eran Steinberg, Yury Prilutsky, Alexei Pososin, Petronel Bigioi, Adrian Zamfir, Alexandru Drimbarean, Peter Corcoran
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Patent number: 8320641Abstract: A method for red-eye detection in an acquired digital image acquiring one or more preview or other reference images without a flash. Any red regions that exist within the one or more reference images are determined. A main image is acquired with a flash of approximately a same scene as the one or more reference images. The main image is analyzed to determine any candidate red eye defect regions that exist within the main image. Any red regions determined to exist within the one or more reference images are compared with any candidate red eye defect regions determined to exist within the main image. Any candidate red eye defect regions within the main image corresponding to red regions determined also to exist within the one or more reference images are removed as candidate red eye defect regions.Type: GrantFiled: June 19, 2008Date of Patent: November 27, 2012Assignee: DigitalOptics Corporation Europe LimitedInventors: Eran Steinberg, Peter Corcoran, Yury Prilutsky, Petronel Bigioi, Adrian Zamfir, Florin Nanu, Alexandru Drimbarean
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Patent number: 8294748Abstract: A technique of generating a panoramic image involves acquiring a set of at least two main image frames, as well as corresponding generating and/or acquiring corresponding relatively low-resolution image frames, of overlapping portions of a panoramic scene. A map or other information is stored relating to the generation of a low-res panorama. A main panorama image is formed by joining main image frames based on the map or other information gained in the low-res process.Type: GrantFiled: December 11, 2009Date of Patent: October 23, 2012Assignee: DigitalOptics Corporation Europe LimitedInventors: Piotr Stec, Larry Murray, Alexandru Drimbarean, Igor Barcovschi, Peter Corcoran
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Patent number: 8270674Abstract: An image processing apparatus for tracking faces in an image stream iteratively receives an acquired image from the image stream potentially including one or more face regions. The acquired image is sub-sampled at a specified resolution to provide a sub-sampled image. An integral image is then calculated for a least a portion of the sub-sampled image. Fixed size face detection is applied to at least a portion of the integral image to provide a set of candidate face regions. Responsive to the set of candidate face regions produced and any previously detected candidate face regions, the resolution is adjusted for sub-sampling a subsequent acquired image.Type: GrantFiled: January 3, 2011Date of Patent: September 18, 2012Assignee: DigitalOptics Corporation Europe LimitedInventors: Peter Corcoran, Eran Steinberg, Stefan Petrescu, Alexandru Drimbarean, Florin Nanu, Alexei Pososin, Petronel Bigioi