CORRECTING METHOD FOR DIRECTIONAL DATA OF STREAKED PATTERNS AND INFORMATION PROCESSING APPARATUS FOR EXECUTING IT AND CORRECTING METHOD FOR PITCH DATA OF STREAKED PATTERNS AND INFORMATION PROCESSING APPARATUS FOR EXECUTING IT

A method and an apparatus for correcting directional data and pitch data are provided. Initially, a picture of a streaked pattern and corresponding directional data having a plurality of zones are entered and displayed on a display unit. The operator then designates the areas to be corrected in the direction data by designating a contour and direction indicating lines. The directions of the zones through which the direction indicating lines pass are set to the directions of these indicating lines. Subsequently, the directions of zones where the direction was not set are calculated so as to minimize a function H. With the distance between a zone Z and a defined zone Zi being represented by Ri, the function H is set so that the correlation between the direction D of the zone Z and the direction Di of the defined zone Zi improves as the value of Ri decreases.