HOG: calculate the HOG (Histogram of oriented gradients) for an image
The function is a modification of the 'findHOGFeatures' function of the SimpleCV package [ please consult the COPYRIGHT file ]
The function takes either an RGB (it will be converted to gray) or a gray image and returns a vector of the HOG descriptors.
The main purpose of the function is to create a vector of features, which can be used in classification tasks.
HOG(image, cells = 3, orientations = 6)
matrix or 3-dimensional array
the number of divisions ( cells )
number of orientation bins
a numeric vector
This function takes either a matrix, a data frame or a 3-dimensional array and returns a vector with the HOG-descriptors (histogram of oriented gradients).