"No one is harder on a talented person than the person themselves" - Linda Wilkinson ; "Trust your guts and don't follow the herd" ; "Validate direction not destination" ;

August 23, 2015

Video Analytics Concepts

  • Image - Matrix of Intensity Values
  • Each pixel has a byte where you can store information
  • Image can be represented in a matrix
  • Image can be represented as a function
Image Processing Operations
  • Point, Local, Global
  • Point - Take every pixel and perform operation
  • Local - Local Neighbourhood data manipulation. Global is extension of local
Point Operations
  • Image Enhancement - new_Pixel = max-old_Pixel+min
  • Contrast Stretching - Histogram stretching

  • Local - Noise reduction using moving average
  • Weighted sum of neighbours computation
  • Linear Filtering - Cross Correlation, Gaussian Filter
  • Convolution Vs Correlation
Happy Learning!!!

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