Creates a binary image of an ellipse. Creats a binary image of size (mrows x ncols), with all pixels off except inside of the specified ellipse. The ellipse is given by 5 parameters, a semimajor axis of ra, a semminor axis of radius rb, angle phi (in radians), centered at (crow,ccol). An alternative method of specifying the ellipse parameters is in terms of the parameters of a 2d gaussian. For more information on how a gaussian relates to an ellipse see gauss2ellipse. USAGE mask = mask_ellipse( mrows, ncols, crow, ccol, ra, rb, phi ) mask = mask_ellipse( mrows, ncols, mu, C, d ) INPUTS % version 1 mrows - number of rows in mask ncols - number of columns in mask crow - the row location of the center of the ellipse ccol - the column location of the center of the ellipse ra - semi-major axis length (in pixels) of the ellipse rb - semi-minor axis length (in pixels) of the ellipse phi - rotation angle (in radians) of the semimajor axis from the x-axis % version 2 mrows - number of rows in mask ncols - number of columns in mask mu - 1x2 vector representing the center of the ellipse C - 2x2 cov matrix d - [optional] Number of std to create the ellipse to (2 is default) OUTPUTS mask - created image mask EXAMPLE mask = mask_ellipse( 200, 200, 40, 100, 20, 15, pi/4 ); figure(1); im(mask); [mu,C] = imageMLG( mask, 0, 2 ); DATESTAMP 29-Sep-2005 2:00pm See also PLOT_ELLIPSE, GAUSS2ELLIPSE, MASK_CIRCLE, MASK_GAUSSIANS, IMAGEMLG