Patents by Inventor Stefan Petrescu

Stefan Petrescu 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).

  • Publication number: 20210067686
    Abstract: A method and system for detecting facial expressions in digital images and applications therefore are disclosed. Analysis of a digital image determines whether or not a smile and/or blink is present on a person's face. Face recognition, and/or a pose or illumination condition determination, permits application of a specific, relatively small classifier cascade.
    Type: Application
    Filed: September 14, 2020
    Publication date: March 4, 2021
    Inventors: Catalina NEGHINA, Mihnea GANGEA, Stefan PETRESCU, Emilian DAVID, Petronel BIGIOI, Eric ZARAKOV, Eran STEINBERG
  • Publication number: 20200334853
    Abstract: Tracking units for facial features with advanced training for natural rendering of human faces in real-time are provided. An example device receives a video stream, and upon detecting a visual face, selects a 3D model from a comprehensive set of head orientation classes. The device determines modifications to the selected 3D model to describe the face, then projects a 2D model of tracking points of facial features based on the 3D model, and controls, actuates, or animates hardware based on the facial features tracking points. The device can switch among an example comprehensive set of 35 different head orientation classes for each video frame, based on suggestions computed from a previous video frame or from yaw and pitch angles of the visual head orientation. Each class of the comprehensive set is trained separately based on a respective collection of automatically marked images for that head orientation class.
    Type: Application
    Filed: July 6, 2020
    Publication date: October 22, 2020
    Inventors: Mihai CIUC, Stefan PETRESCU, Emanuela HALLER, Florin OPREA, Alexandru NICOLAESCU, Florin NANU, Iulian PALADE
  • Patent number: 10778885
    Abstract: A method and system for detecting facial expressions in digital images and applications therefore are disclosed. Analysis of a digital image determines whether or not a smile and/or blink is present on a person's face. Face recognition, and/or a pose or illumination condition determination, permits application of a specific, relatively small classifier cascade.
    Type: Grant
    Filed: April 9, 2018
    Date of Patent: September 15, 2020
    Assignee: FotoNation Limited
    Inventors: Catalina Neghina, Mihnea Gangea, Stefan Petrescu, Emilian David, Petronel Bigioi, Eric Zarakov, Eran Steinberg
  • Patent number: 10740633
    Abstract: Method for monitoring eyelid opening values. In one embodiment video image data is acquired with a camera which data are representative of a person engaged in an activity, where the activity may be driving a vehicle, operating industrial equipment, or performing a monitoring or control function. When the person's head undergoes a change in yaw angle, such that eyelids of both eyes of the person are captured with the camera, but one eye is closer to the camera than the other eye, a weighting factor is applied, which factor varies as a function of the yaw angle such that a value representative of eyelid opening data based on both eyes is calculated.
    Type: Grant
    Filed: October 2, 2018
    Date of Patent: August 11, 2020
    Assignee: FotoNation Limited
    Inventors: Florin Nanu, Stefan Petrescu, Florin Oprea, Emanuela Haller
  • Patent number: 10706577
    Abstract: Tracking units for facial features with advanced training for natural rendering of human faces in real-time are provided. An example device receives a video stream, and upon detecting a visual face, selects a 3D model from a comprehensive set of head orientation classes. The device determines modifications to the selected 3D model to describe the face, then projects a 2D model of tracking points of facial features based on the 3D model, and controls, actuates, or animates hardware based on the facial features tracking points. The device can switch among an example comprehensive set of 35 different head orientation classes for each video frame, based on suggestions computed from a previous video frame or from yaw and pitch angles of the visual head orientation. Each class of the comprehensive set is trained separately based on a respective collection of automatically marked images for that head orientation class.
    Type: Grant
    Filed: March 6, 2018
    Date of Patent: July 7, 2020
    Assignee: FotoNation Limited
    Inventors: Mihai Ciuc, Stefan Petrescu, Emanuela Haller, Florin Oprea, Alexandru Nicolaescu, Florin Nanu, Iulian Palade
  • Patent number: 10455147
    Abstract: A method of processing an image comprises: acquiring an image of a scene including an object having a recognizable feature. A lens actuator setting providing a maximum sharpness for a region of the image including the object and a lens displacement corresponding to the lens actuator setting are determined. A distance to the object based on the lens displacement is calculated. A dimension of the feature as a function of the distance to the object, the imaged object size and a focal length of a lens assembly with which the image was acquired, is determined. The determined dimension of the feature is employed instead of an assumed dimension of the feature for subsequent processing of images of the scene including the object.
    Type: Grant
    Filed: December 9, 2015
    Date of Patent: October 22, 2019
    Assignee: FotoNation Limited
    Inventors: Alexandru Malaescu, Florin Nanu, Stefan Petrescu, Peter Corcoran, Petronel Bigioi
  • Publication number: 20190279393
    Abstract: Tracking units for facial features with advanced training for natural rendering of human faces in real-time are provided. An example device receives a video stream, and upon detecting a visual face, selects a 3D model from a comprehensive set of head orientation classes. The device determines modifications to the selected 3D model to describe the face, then projects a 2D model of tracking points of facial features based on the 3D model, and controls, actuates, or animates hardware based on the facial features tracking points. The device can switch among an example comprehensive set of 35 different head orientation classes for each video frame, based on suggestions computed from a previous video frame or from yaw and pitch angles of the visual head orientation. Each class of the comprehensive set is trained separately based on a respective collection of automatically marked images for that head orientation class.
    Type: Application
    Filed: March 6, 2018
    Publication date: September 12, 2019
    Inventors: Mihai CIUC, Stefan PETRESCU, Emanuela HALLER, Florin OPREA, Alexandru NICOLAESCU, Florin NANU, Iulian PALADE
  • Publication number: 20190102637
    Abstract: Related methods are provided for establishing a baseline value to represent an eyelid opening dimension for a person engaged in an activity, where the activity may be driving a vehicle, operating industrial equipment, or performing a monitoring or control function; and for operating a system for monitoring eyelid opening values with real time video data.
    Type: Application
    Filed: October 2, 2018
    Publication date: April 4, 2019
    Inventors: Florin NANU, Stefan PETRESCU, Florin OPREA, Emanuela HALLER
  • Publication number: 20190102638
    Abstract: Method for monitoring eyelid opening values. In one embodiment video image data is acquired with a camera which data are representative of a person engaged in an activity, where the activity may be driving a vehicle, operating industrial equipment, or performing a monitoring or control function. When the person's head undergoes a change in yaw angle, such that eyelids of both eyes of the person are captured with the camera, but one eye is closer to the camera than the other eye, a weighting factor is applied, which factor varies as a function of the yaw angle such that a value representative of eyelid opening data based on both eyes is calculated.
    Type: Application
    Filed: October 2, 2018
    Publication date: April 4, 2019
    Inventors: Florin NANU, Stefan PETRESCU, Florin OPREA, Emanuela HALLER
  • Publication number: 20180295279
    Abstract: A method and system for detecting facial expressions in digital images and applications therefore are disclosed. Analysis of a digital image determines whether or not a smile and/or blink is present on a person's face. Face recognition, and/or a pose or illumination condition determination, permits application of a specific, relatively small classifier cascade.
    Type: Application
    Filed: April 9, 2018
    Publication date: October 11, 2018
    Inventors: Catalina NEGHINA, Mihnea GANGEA, Stefan PETRESCU, Emilian DAVID, Petronel BIGIOI, Erik ZARAKOV, Eran STEINBERG
  • Patent number: 10032068
    Abstract: A method of making an image in a digital camera comprises capturing a digital image of a scene into which the camera user is to be inserted, and superimposing a symbol (subject locator) onto the scene image representing at least a part of a human subject. The subject locator is scaled to a desired size and moved to a desired position relative to the scene image. Next a digital image of the user is captured, and at least the part of the user image represented by the subject locator is extracted. The part of the user image represented by the subject locator is scaled (before or after extraction) to substantially the same size as the subject locator and inserted into the first image at the position of the subject locator. In a second embodiment the method comprises displaying a preview image of a scene into which the camera user is to be inserted, and superimposing the subject locator on the preview image.
    Type: Grant
    Filed: April 25, 2016
    Date of Patent: July 24, 2018
    Assignee: FotoNation Limited
    Inventors: Stefan Petrescu, Alexandru Drimbarean, Peter Corcoran
  • Patent number: 9942470
    Abstract: A method and system for detecting facial expressions in digital images and applications therefore are disclosed. Analysis of a digital image determines whether or not a smile and/or blink is present on a person's face. Face recognition, and/or a pose or illumination condition determination, permits application of a specific, relatively small classifier cascade.
    Type: Grant
    Filed: October 3, 2016
    Date of Patent: April 10, 2018
    Assignee: FotoNation Limited
    Inventors: Catalina Neghina, Mihnea Gangea, Stefan Petrescu, Emilian David, Petronel Bigioi, Erik Zarakov, Eran Steinberg
  • Patent number: 9639775
    Abstract: A template matching module is configured to program a processor to apply multiple differently-tuned object detection classifier sets in parallel to a digital image to determine one or more of an object type, configuration, orientation, pose or illumination condition, and to dynamically switch between object detection templates to match a determined object type, configuration, orientation, pose, blur, exposure and/or directional illumination condition.
    Type: Grant
    Filed: March 30, 2015
    Date of Patent: May 2, 2017
    Assignee: FotoNation Limited
    Inventors: Bogdan Sultana, Stefan Petrescu, Radu Nicolau, Vlad Ionut Ursachi, Petronel Bigioi, Corneliu Zaharia, Peter Corcoran, Szabolcs Fulop, Mihnea Gangea
  • Publication number: 20170070649
    Abstract: A digital camera has an integral flash and stores and displays a digital image. Under certain conditions, a flash photograph taken with the camera may result in a red-eye phenomenon due to a reflection within an eye of a subject of the photograph. A digital apparatus has a red-eye filter which analyzes at least one partial face region identified within the digital image for the red-eye phenomenon and modifies the image to eliminate the red-eye phenomenon by changing the red area to black. The modification of the image is enabled when a photograph is taken under conditions indicative of the red-eye phenomenon. The modification is subject to anti-falsing analysis which further examines the area around the red-eye area for indicia of the eye of the subject. The detection and correction can be optimized for performance and quality by operating on subsample versions of the image when appropriate.
    Type: Application
    Filed: August 9, 2016
    Publication date: March 9, 2017
    Inventors: Florin NANU, Eran STEINBERG, Stefan PETRESCU, Mihnea GANGEA, Adrian CAPATA, Mihai CIUC, Adrian ZAMFIR, Peter CORCORAN, Alexei POSOSIN, Petronel BIGIOI, Alexandru DRIMBAREAN
  • Publication number: 20170026567
    Abstract: A method and system for detecting facial expressions in digital images and applications therefore are disclosed. Analysis of a digital image determines whether or not a smile and/or blink is present on a person's face. Face recognition, and/or a pose or illumination condition determination, permits application of a specific, relatively small classifier cascade.
    Type: Application
    Filed: October 3, 2016
    Publication date: January 26, 2017
    Inventors: Catalina NEGHINA, Mihnea GANGEA, Stefan PETRESCU, Emilian DAVID, Petronel BIGIOI, Erik ZARAKOV, Eran STEINBERG
  • Patent number: 9462180
    Abstract: A method and system for detecting facial expressions in digital images and applications therefore are disclosed. Analysis of a digital image determines whether or not a smile and/or blink is present on a person's face. Face recognition, and/or a pose or illumination condition determination, permits application of a specific, relatively small classifier cascade.
    Type: Grant
    Filed: June 9, 2014
    Date of Patent: October 4, 2016
    Assignee: FotoNation Limited
    Inventors: Catalina Neghina, Mihnea Gangea, Stefan Petrescu, Emilian David, Petronel Bigioi, Eric Zarakov, Eran Steinberg
  • Patent number: 9412007
    Abstract: A digital camera has an integral flash and stores and displays a digital image. Under certain conditions, a flash photograph taken with the camera may result in a red-eye phenomenon due to a reflection within an eye of a subject of the photograph. A digital apparatus has a red-eye filter which analyzes at least one partial face region identified within the digital image for the red-eye phenomenon and modifies the image to eliminate the red-eye phenomenon by changing the red area to black. The modification of the image is enabled when a photograph is taken under conditions indicative of the red-eye phenomenon. The modification is subject to anti-falsing analysis which further examines the area around the red-eye area for indicia of the eye of the subject. The detection and correction can be optimized for performance and quality by operating on subsample versions of the image when appropriate.
    Type: Grant
    Filed: August 31, 2009
    Date of Patent: August 9, 2016
    Assignee: FOTONATION LIMITED
    Inventors: Florin Nanu, Eran Steinberg, Peter Corcoran, Alexei Pososin, Petronel Bigioi, Alexandru Drimbarean, Stefan Petrescu, Mihnea Gangea, Adrian Capata, Mihai Ciuc, Adrian Zamfir
  • Publication number: 20160165129
    Abstract: A method of processing an image comprises: acquiring an image of a scene including an object having a recognisable feature. A lens actuator setting providing a maximum sharpness for a region of the image including the object and a lens displacement corresponding to the lens actuator setting are determined. A distance to the object based on the lens displacement is calculated. A dimension of the feature as a function of the distance to the object, the imaged object size and a focal length of a lens assembly with which the image was acquired, is determined. The determined dimension of the feature is employed instead of an assumed dimension of the feature for subsequent processing of images of the scene including the object.
    Type: Application
    Filed: December 9, 2015
    Publication date: June 9, 2016
    Inventors: Alexandru Malaescu, Florin Nanu, Stefan Petrescu, Peter Corcoran, Petronel Bigioi
  • Publication number: 20160104032
    Abstract: A method of detecting a face in an image includes performing face detection within a first window of the image at a first location. A confidence level is obtained from the face detection indicating a probability of the image including a face at or in the vicinity of the first location. Face detection is then performed within a second window at a second location, wherein the second location is determined based on the confidence level.
    Type: Application
    Filed: December 16, 2015
    Publication date: April 14, 2016
    Applicant: FotoNation Limited
    Inventors: Eran STEINBERG, Petronel BIGIOI, Peter CORCORAN, Mihnea GANGEA, Stefan PETRESCU, Andrei VASILIU, Gabriel COSTACHE, Alexandru DRIMBAREAN
  • Publication number: 20150206030
    Abstract: A template matching module is configured to program a processor to apply multiple differently-tuned object detection classifier sets in parallel to a digital image to determine one or more of an object type, configuration, orientation, pose or illumination condition, and to dynamically switch between object detection templates to match a determined object type, configuration, orientation, pose, blur, exposure and/or directional illumination condition.
    Type: Application
    Filed: March 30, 2015
    Publication date: July 23, 2015
    Inventors: BOGDAN SULTANA, STEFAN PETRESCU, RADU NICOLAU, VLAD IONUT URSACHI, PETRONEL BIGIOI, CORNELIU ZAHARIA, PETER CORCORAN, SZABOLCS FULOP, MIHNEA GANGEA