Stereo vision method of depth estimation involves usage of two active cameras place side by side. Stereo vision works on the same principle as our eyes to obtain 3D data from surroundings. It involves processing of two perspectives of same object to estimate its depth. Our eyes capture the left eye perspective and right eye perspective which is later sent to our brain where it is processed. Henceforth, we can estimate the depth of object. Position of object in left and right perspective images is not the same. It is displaced by a certain value. This displacement is called disparity. Disparity is inversely proportional to depth. This data helps is to extract exact depth values for each object in view.