1. A method of determining at least one contour of a left and/or right ventricle of a heart from at least one image of the heart, for example, an image acquired by means of MR imaging, in which there are determined start parameters which are subsequently optimized by means of an iteration procedure so as to form final parameters which define the contour, characterized in that the iteration is performed with predetermined step sizes for the parameters as well as with a predetermined number of steps, where in each iteration step and for each parameter setting individually: grey values of the image are determined at a predetermined side of the contour so as to provide a first reference image; the first reference image is processed so as to form a second reference image in which a uniform grey value which is derived from a grey value from the first reference image is taken up at the predetermined side of the contour; the first and the second reference image are correlated so as to provide a parameter correlation value and, when the latter correlation value has been improved relative to the parameter correlation value associated with a preceding iteration step, the parameters associated said improved parameter correlation value are selected as a basis for the next iteration step, the final iteration step yielding the final parameters which define the contour.