METHOD OF CONTACT-FREE MEASUREMENT OF OBJECTS HAVING DEFOCUSED BORDERS ONTO IMAGE Russian patent published in 2006 - IPC G01B11/02 G06T7/60 

FIELD: measurement technology.

SUBSTANCE: method of contact-free measurement of objects which have defocused borders onto image is based upon registration of object's image in memorizing unit, on presetting of rectangular areas of images fro subsequent detection of object's shape, on performing of differential-integral transforms, upon finding of coordinates of shape and calculating of sizes. In addition due to calibration of measurement system, the width of shape's lines is found depending on shift of object. While measuring, width of shapes of lines is found, and using the found dependence, the width of lines is transformed into distance from borders of object to defocusing plane, which distance is taken into account when calculating sizes of objects. Set of blanks with different thickness can be measured without re-focusing of system. Three-dimensional object sizes can be measured when faces of objects are disposed at some distance from focusing plane and are disposed not in parallel to it.

EFFECT: improved efficiency of operation.

7 dwg