Method for generating three-dimensional diagram of object, three-dimensional diagram generation apparatus and three-dimensional shape inspection apparatus

A three-dimensional diagram generation apparatus for generating a three-dimensional diagram of a three-dimensional object, the three-dimensional diagram generation apparatus comprising:

• a controller that generates the three-dimensional diagram of the object based on an image obtained by imaging the object,
• wherein the controller
• acquires a vertical view image of the object imaged from vertically above and multiple oblique view images of the object imaged from multiple obliquely upper directions,
• extracts a contour line in the vertical view image of the object to generate a vertical view diagram of the object,
• respectively converts the vertical view diagram into multiple oblique view diagrams based on a shape parameter including height information of the object stored in a storage part, and repeatedly executes adjustment of the shape parameter and conversion of the vertical view diagram into each of the oblique view diagrams until each of the converted oblique view diagrams overlaps with each of the oblique view images, and
• synthesizes the generated vertical view diagram and each of the oblique view diagrams overlapping with each of the oblique view images to generate the three-dimensional diagram.

A three-dimensional shape inspection apparatus for performing shape inspection on a three-dimensional object, the three-dimensional shape inspection apparatus comprising:

• a master three-dimensional diagram generation part that generates a master three-dimensional diagram of a standard product of the object;
• and
• an inspection part that compares a three-dimensional diagram of the object with the master three-dimensional diagram to perform inspection on the object,
• wherein the master three-dimensional diagram generation part
• acquires a standard vertical view image of the standard product imaged from vertically above and multiple standard oblique view images of the standard product imaged from multiple obliquely upper directions,
• extracts a contour line in the standard vertical view image of the standard product to generate a standard vertical view diagram of the standard product,
• respectively converts the standard vertical view diagram into multiple standard oblique view diagrams based on a shape parameter including height information of the standard product stored in a storage part, and repeatedly executes adjustment of the shape parameter and conversion of the standard vertical view diagram into each of the standard oblique view diagrams until each of the converted standard oblique view diagrams overlaps with each of the standard oblique view images, and
• synthesizes the generated standard vertical view diagram and each of the standard oblique view diagrams overlapping with each of the standard oblique view images to generate the master three-dimensional diagram, and
• the inspection part
• acquires a vertical view image of the object imaged from vertically above and multiple oblique view images of the object imaged from multiple obliquely upper directions,
• extracts a contour line from the vertical view image while referring to the master three-dimensional diagram to generate a vertical view diagram of the object,
• respectively extracts a contour line from each of the oblique view images while referring to the master three-dimensional diagram to generate multiple oblique view diagrams of the object,
• synthesizes the generated vertical view diagram and each of the oblique view diagrams to generate the three-dimensional diagram of the object, and
• compares the generated three-dimensional diagram of the object with the master three-dimensional diagram to perform inspection on a three-dimensional shape of the object.