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US 2026/0092878 A1Published application
Multi-field layer inspection method for surface of cylindrical object
AssigneeEnscape Co., Ltd.
InventorsHyeok Gi Gwon, Ji Man Ryu, Seong Gi Kim, In Ho Ka, Sang Jin Choi, Sang Baek Kim
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Abstract
Disclosed is a multi-field layer inspection method for the surface of a cylindrical object, in which several areas for bright, dark, and edge fields are extracted from multiple images, and these extracted areas are combined to form a complete lateral area in each field, enabling accurate detection of recessed defects below the reference plane, protruding defects above it, as well as planar defects.
Claims8
A multi-field layer inspection method for the surface of a cylindrical object, the method comprising:
- irradiating light from the front and back of the cylindrical object;
- acquiring an image captured by a camera while irradiating the light;
- extracting a first area having a predetermined width, which is brightest within a lateral side of the cylindrical object, from the image;
- extracting a second area showing an edge within the lateral side from the image;
- extracting a third area between the first area and the second area from the image;
- generating a bright field image by merging the first areas at a plurality of angles;
- generating an edge field image by merging the second areas at a plurality of angles;
- generating a dark field image by merging the first areas at a plurality of angles;
- and
- identifying a defect in the cylindrical object based on the bright field image, the edge field image, and the dark field image,
- wherein the light irradiation and the image acquisition are performed whenever the cylindrical object is adjusted in angle.
8 more elements
Dependencies are inferred from the claim text.