1. A method of managing the position of the focal plane in a stereoscopic scene represented by a left image and a right image, the method comprising the steps of: dividing the left image and the right image into a plurality of corresponding zones; calculating, for each divided zone, a dominant translation value of the zone of highest correlation between the left image and the right image; classifying the dominant translation values into groups of close dominant translation values; calculating, for each group, the average value of the dominant translation values of the zones constituting the group; determining a relative translation value between the left and right images equal to a highest average value amongst all the average values of the groups, and translating the left and right images according to the determined relative translation value to place the focal plane at the depth of the group having the highest average value.