Image measurement apparatus and method of measuring works using edge detection tools

摘要

An image measurement apparatus includes: an imager section, an obtainment section, an outline detection section, a setting section, and a measurement section. The imager section takes an image of a subject to be measured. The obtainment section obtains a taken image of the subject taken by the imager section. The outline detection section detects, by a Hough transformation, outline of a graphic included in the image obtained by the obtainment section. The setting section sets an edge detection tool on the outline detected by the outline detection section. The measurement section measures, by the edge detection tool set by the setting section, graphic information concerning the graphic.

主权项

1. An image measurement apparatus, comprising:
an imager that takes an image of a subject to be measured; an obtainer that obtains the image of the subject taken by the imager; a designator that designates at least one form of a graphic; an outline detector that detects, from at least one graphic included in the image obtained by the obtainer, by a Hough transformation, at least one outline of at least one graphic that has a substantially same form as the at least one form designated by the designator; a setter that selects at least one edge detection tool in accordance with the at least one outline detected by the outline detector without user intervention, and sets the selected at least one edge detection tool on the at least one outline detected by the outline detector; and a measurer that measures, by the at least one edge detection tool set by the setter, graphic information concerning the graphic, wherein, when the at least one form includes a plurality of different forms, the outline detector sequentially detects outlines of graphics that have substantially same forms as the plurality of different forms, and the setter sequentially selects edge detection tools for the outlines of graphics without user intervention between two succeeding selections of edge detection tools, and wherein the imager, obtainer, designator, outline detector, setter and measurer comprise a processor that executes instructions stored in a memory.