Surface inspection apparatus and method
OwnerYoshiro Yamadainventor
Life of this patent
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Abstract
A surface inspection apparatus inputs image data obtained by scanning an inspection object by a camera which includes a line image sensor into calculation means. The surface inspection apparatus comprises a line memory and adder to add image data of two adjacent main scanning lines to generate an image data string, adds the image data in a block including a plurality of pixels continuous in a main scanning direction by the calculation processor to generate added data in the block, calculates a correlated value of the added data in the blocks adjacent to each other in the main scanning direction, and judges the correlated value with a threshold value by judgment means to obtain a surface state of the inspection object.
Claims14
A surface inspection apparatus comprising:
- a camera comprising a line sensor which scans an inspection object in a main scanning direction to obtain image data;
- sub-scanning means for moving the camera and the inspection object with respect to each other in a sub-scanning direction crossing at right angles to the main scanning direction;
- and
- calculation means for subjecting the image data output from the camera to calculation processing to inspect a surface state of the inspection object, wherein the calculation means comprises:
- image data string generation means for adding the image data of two main scanning lines adjacent to each other in the sub-scanning direction to generate an image data string;
- and
- judgment means for using the image data string to inspect the surface state of the inspection object.
A surface inspection method using a camera comprising a line sensor which scans an inspection object in a main scanning direction to obtain image data, the method comprising:
- a step of moving the camera and inspection object with respect to each other in a sub-scanning direction crossing at right angles to the main scanning direction;
- a step of adding the image data of two main scanning lines adjacent to each other in the sub-scanning direction in the image data output from the camera to generate an image data string;
- and
- a step of using the image data string to inspect a surface state of the inspection object.
Dependencies are inferred from the claim text.