| 摘要 |
<p>The present invention concerns an automated method of optical inspection of containers (6, 6'), in particular of external side wall of bottles, bowls, and vessels intended to store powdered substances and/or gels and/or liquids, preferably food and beverages, wherein one or more cameras (7) acquire two or more images of a container (6, 6') moved by a conveyor belt (4) when the container (6, 6') is in at least one optimal inspection position within an inspection chamber, the method being characterised in that it performs a procedure of rectification onto a plane of at least one portion of a side surface of the container (6, 61) on the basis of said two or more acquired images comprising the following steps: A.1 determining at least one univocally defined reference three- dimensional axis of the container (6, 6') starting from said two or more acquired images; A.2 positioning a three-dimensional model of the container (6, 6') stored in a memory unit on said at least one reference three-dimensional axis as determined in step A.1; A.3 forming a planar image of said at least one portion of the side surface of the container (6, 6'), wherein each two-dimensional point (u, v) corresponds to a specific three-dimensional point (x, y, z) of the selected three-dimensional model in said two or more acquired images according to a mathematical correspondence indicative of a spatial positioning of said one or more cameras (7) with respect to the container (6, 6') when the latter is positioned in said at least one optimal inspection position. The present invention concerns the apparatus that executes such a method.</p> |
