Patents by Inventor Ivan Vasilev

Ivan Vasilev 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).

  • Camera flash module and method for controlling same
    Patent number: 8018525
    Abstract: An auto-exposure algorithm for controlling a camera flash uses image processing to identify important areas of the image affected by the flash, while disregarding highly reflective/illuminated areas and uses a ND filter to linearize the flash triggering with highly reflective scenes. The camera flash is controlled by the auto-exposure algorithm in two stages: a pre-flash stage followed by a main-flash stage. In the pre-flash stage, two images are captured under the same camera settings regarding the exposure time, gain, iris and resolution. One image is captured with flash and one without. From the difference between the two images, a reference pixel is used to determine the flash intensity in the main-flash stage.
    Type: Grant
    Filed: December 17, 2008
    Date of Patent: September 13, 2011
    Assignee: Nokia Corporation
    Inventors: Philip Trevelyan, Angel Ivanov, Emil Kirilov, Ivan Vasilev
  • Camera flash module and method for controlling same
    Publication number: 20090160944
    Abstract: An auto-exposure algorithm for controlling a camera flash uses image processing to identify important areas of the image affected by the flash, while disregarding highly reflective/illuminated areas and uses a ND filter to linearize the flash triggering with highly reflective scenes. The camera flash is controlled by the auto-exposure algorithm in two stages: a pre-flash stage followed by a main-flash stage. In the pre-flash stage, two images are captured under the same camera settings regarding the exposure time, gain, iris and resolution. One image is captured with flash and one without. From the difference between the two images, a reference pixel is used to determine the flash intensity in the main-flash stage.
    Type: Application
    Filed: December 17, 2008
    Publication date: June 25, 2009
    Inventors: Philip Trevelyan, Angel Ivanov, Emil Kirilov, Ivan Vasilev