G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 21/88 (2006.01) G01N 21/89 (2006.01) G06T 9/00 (2006.01)
Patent
CA 2041456
Abstract The invention relates to a method of and an equipment for optical inspection of strip and sheet products for the detection of surface defects, which equipment comprises an image forming apparatus (1, 2) for the production of images of successive parts of the sur- face of a product (3) and for the conversion of these images to analog signals (4), an A/D converter (5) for the conversion of the analog signal (4) to a dig- ital signal (6) and an image analyzing unit (7) for an analysis of the digital signal (6) in order to detect surface defects and to bring them to the user's knowledge. To reduce the data processing capa- city required of the image analyzing unit (7), the equipment further comprises a compression unit (8) arranged between the A/D converter (5) and the image analyzing unit (7) for the compression of the digital signal (6) before it is analyzed.
Laitinen Toni
Piironen Timo
Rautaruukki Oy
Sim & Mcburney
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