Invention Grant
US08497878B2 Method and apparatus for determining image orientation 有权
用于确定图像取向的方法和装置

  • Patent Title: Method and apparatus for determining image orientation
  • Patent Title (中): 用于确定图像取向的方法和装置
  • Application No.: US12610801
    Application Date: 2009-11-02
  • Publication No.: US08497878B2
    Publication Date: 2013-07-30
  • Inventor: Jianping Zhou
  • Applicant: Jianping Zhou
  • Applicant Address: US TX Dallas
  • Assignee: Texas Instruments Incorporated
  • Current Assignee: Texas Instruments Incorporated
  • Current Assignee Address: US TX Dallas
  • Agent Mima Abyad; W. James Brady; Frederick J. Telecky, Jr.
  • Main IPC: G09G5/00
  • IPC: G09G5/00
Method and apparatus for determining image orientation
Abstract:
A method and apparatus for automatically deciding on the orientation of image. The method includes computing average and standard deviation of luminance of the top region of a portion of the image, of the bottom region of a portion of the image, of the left region of a portion of the image, and of the right region of a portion of the image, computing average luminance of the image, computing, in the digital signal processor, consolidated luminance difference and uniformity of top and bottom regions, and left and right regions, utilizing the computed average and standard deviation of at least one of the bottom region, the left region or the right region and utilizing portrait orientation if difLR−difTB>t1 && stdTB−stdLR>t2 or if difLR−difTB>t3 && stdTB−stdLR>t4, otherwise, utilizing landscape orientation.
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