Image Statistics Functions

This chapter describes the Intel® IPP image processing functions that can be used to compute the following statistical parameters of an image:

• sum, integrals, mean and standard deviation of pixel values
• intensity histogram of pixel values
• minimum and maximum pixel values
• spatial and central moments of order 0 to 3
• the infinity, L1, and L2 norms of the image pixel values and of the differences between pixel values of two images
• relative error values for the infinity, L1, and L2 norms of differences between pixel values of two images
• universal image quality index
• proximity measures of an image and a template (another image).

• Sum
  Computes the sum of image pixel values.
• Integral
  Transforms an image to the integral representation.
• SqrIntegral
  Transforms an image to integral and integral of pixel squares representations.
• TiltedIntegral
  Transforms an image to the tilted integral representation.
• TiltedSqrIntegral
  Transforms an image to tilted integral and tilted integral of pixel squares representations.
• Mean
  Computes the mean of image pixel values.
• Mean_StdDev
  Computes the mean and standard deviation of image pixel values.
• RectStdDev
  Computes the standard deviation of the integral images.
• TiltedRectStdDev
  Computes the standard deviation of the tilted integral images.
• HistogramGetBufferSize
  Computes the size of the specification structure and work buffer for the ippiHistogram function.
• HistogramGetLevels
  Returns the array with level values stored in the specification structure.
• HistogramInit, HistogramUniformInit
  Initializes the specification structure for the ippiHistogram function.
• Histogram
  Computes the intensity histogram of an image.
• CountInRange
  Computes the number of pixels within the given intensity range.
• BlockMinMax
  Finds minimum and maximum values for blocks of an image.
• Min
  Computes the minimum of image pixel values.
• MinIndx
  Computes the minimum of image pixel values and retrieves the x and y coordinates of pixels with minimal intensity values.
• Max
  Computes the maximum of image pixel values.
• MaxIndx
  Computes the maximum of image pixel values and retrieves the x and y coordinates of pixels with maximal intensity values.
• MinMax
  Computes the minimum and maximum of image pixel values.
• MinMaxIndx
  Calculates minimum and maximum pixel values and their indexes in selected image rectangle.
• MaxEvery
  Computes maximum value for each pair of pixels of two images.
• MinEvery
  Computes minimum value for each pair of pixels of two images.
• FindPeaks3x3GetBufferSize
  Computes the size of the working buffer for the peak search.
• FindPeaks3x3
  Finds coordinates of peaks (maximums or minimums) with absolute value exceeding threshold value.
• Image Moments
  
• Image Norms
  
• Image Quality Index
  
• Image Proximity Measures