Ball in 2D
For reference see incontrastsRef.html.
function q = referenceBall2D(X1,X2, varargin) % seti.qBall: contrast value q of the ball % seti.rBall: radius seti = varargin{end}; seti = checkfield(seti,'qBall',0.8); seti = checkfield(seti,'rBall',0.015); qBall = seti.qBall; rBall = seti.rBall; r = hypot(X1, X2); q = qBall*( r < rBall ); q = double(q); end