%MEANSHIFT  Finds an object on a back projection image
%
%    window = cv.meanShift(probImage, window, 'OptionName', optionValue, ...)
%
% ## Input
% * __probImage__ Back projection of the object histogram. See
%        cv.calcBackProject.
% * __window__ Initial window.
%
% ## Output
% * __window__ Output window.
%
% ## Options
% * __Criteria__ Stop criteria for the underlying meanShift. Accepts a
%        struct with 'type', 'maxCount', and 'epsilon' fields.
%
% The function implements the iterative object search algorithm. It takes
% the input back projection of an object and the initial position. The mass
% center in window of the back projection image is computed and the search
% window center shifts to the mass center. The procedure is repeated until
% the specified number of iterations criteria.maxCount is done or until the
% window center shifts by less than criteria.epsilon. The algorithm is used
% inside cv.CamShift and, unlike cv.CamShift, the search window size or
% orientation do not change during the search. You can simply pass the
% output of cv.calcBackProject to this function. But better results can be
% obtained if you pre-filter the back projection and remove the noise. For
% example, you can do this by retrieving connected components with
% cv.findContours, throwing away contours with small area ( cv.contourArea
% ), and rendering the remaining contours with cv.drawContours.
%
% See also cv.CamShift cv.calcBackProject
%