Patent ID: 11933739
Assignee: NEC CORPORATION
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 9:
10. An inspection method for sequentially inspecting a plurality of products manufactured by a same manufacturing process, the inspection method comprising, for each of the products:
a process to position the product to inspect;
a process to shoot an entire surface of the product with a first camera with a wide angle;
a process to divide an image of the entire surface obtained by shooting with the first camera into a plurality of wide-angle partial area images having a one-to-one correspondence with a plurality of partial areas obtained by dividing the entire surface into a plurality of areas, and generate a wide-angle camera image having, for each of the partial areas, a set of the wide-angle partial area image, coordinate values of the partial area, and an ID of the partial area;
a process to, for each of the partial areas, shoot the partial area specified by the coordinate values of the partial area on the entire surface of the product with a second camera with a narrower angle than the first camera under various shooting conditions in a pre-learning shooting condition table in which the various shooting conditions and shooting condition IDs uniquely identifying the various shooting conditions are set in advance;
a process to, for each of the partial areas, select a narrow-angle partial area image suitable for inspection from narrow-angle partial area images that are images of partial areas obtained by shooting with the second camera, and generate an inspection image including the selected narrow-angle partial area image and the shooting condition ID used for shooting the narrow-angle partial area image;
a process to detect an anomaly of the entire surface of the product based on the inspection image;
a process to, when inspection of the positioned product has finished, for each of the partial areas, determine effectiveness of each of the various shooting conditions based on a frequency of the shooting condition ID included by the inspection image; and
a process to, for each of the partial areas, determine whether or not an end-of-learning condition is established and, with respect to the partial area in which the end-of learning condition is established, generate a post-learning shooting condition table in which only the various shooting condition determined to be effective in determination of the effectiveness among the various shooting conditions is set,
wherein with respect to the partial area for which the post-learning shooting condition table has been generated, the post-learning shooting condition table is used instead of the pre-learning shooting condition table in later inspection of the product.