Patent ID: 9420160
Filing Date: 2016-08-16
CPC Classification: G01C,G03B,H04N

Claim Text:
1. An information processing apparatus, comprising a processor for performing processes of: an obtainer configured to obtain a plurality of object images, the plurality of object images being taken by an image pickup while moving a focal position within a predetermined range, the image pickup being capable of taking images of an object at arbitrary focal positions within the predetermined range; a first calculator capable of calculating a first in-focus position within the predetermined range based on pieces of contrast information on a manually-taken object image group to obtain a predictive search range, the manually-taken object image group including the plurality of object images taken while manually moving the focal position within the predetermined range, the first calculator configured to calculate a contrast peak value within the predetermined range based on pieces of contrast information on the manually-taken object image group; a second calculator capable of calculating a second in-focus position within the predictive search range based on pieces of contrast information on an automatically-taken object image group, the automatically-taken object image group including the plurality of object images taken while automatically moving the focal position within the predictive search range, the predictive search range being determined with reference to the calculated first in-focus position; and a determiner configured to attenuate the contrast peak value at a predetermined rate.