If you omit the argument, n defaults to 256. E has six columns, with each column containing a different parameter for the ellipses. This table describes the columns of the matrix. Columns 2 through 5 must be specified in terms of this range. All inputs must be of class double .
All outputs are of class double .
Remarks For any given pixel in the output image, the pixel's value is equal to the sum of the additive intensity values of all ellipses that the pixel is a part of. If a pixel is not part of any ellipse, its value is 0. Reference Jain, Anil K. Fundamentals of Digital Image Processing.