(under subclass 4.01) Subject matter that includes a determination of the distance of or to an observed object by the relative focused size of the object or dimensional spread of reference points on the focal plane of the photodetector with respect to a calibrated size and corresponding distance.
(1) Note. The image size must be derived from a focused image as opposed to a blur circle size.
SEE OR SEARCH THIS CLASS, SUBCLASS:
4.04, for blur circle size or edge detection.
21, for the same, but without photodetection.
SEE OR SEARCH CLASS
348, Television, 140, where a picture image signal is analyzed for size.
