1. A method for performing three dimensional, stereo measurement, comprising: obtaining a sensor image from a sensor providing an image of a scene; providing first and second reference images of the scene that are a stereo pair of images; registering the sensor image with the first reference image; selecting a point of interest from one of the sensor image and the first reference image; performing a stereo point measurement from the selected point of interest and the first reference image to determine a point in the second reference image that represents a stereo mate of the selected point in the first reference image; defining a three dimensional grid; and using parametric data from the selected points of interest in the first and second reference images, and each three dimensional point within said grid, to determine three dimensional coordinates of a calculated point within said second reference image that is a minimum distance from said stereo mate point in the second reference image; and denoting said calculated point as the optimum stereo coordinate measurement of said point in said second reference image.