FOCUSING POSITION DETECTION METHOD, FOCUSING POSITION DETECTOR, RECORDING MEDIUM, AND FOCUSING POSITION DETECTION PROGRAM

摘要

In a focusing position detection method, a second step is carried out. The second step includes dividing the object image into a plurality of local regions, obtaining a local value indicating the degree of focalization from the local region for each of the plurality of local regions and obtaining the focus degree on the basis of the plurality of local values. Thus, even when a plurality of object images acquired by imaging an imaging object by using an imager while changing a focal position along an optical axis are relatively dark or include a high-luminance region, it is possible to stably detect a focusing position without repeating detection operations.