| 摘要 |
A method of detecting unwanted objects or faults in a plurality of containers (16) including a fluid or liquid comprises providing a path of travel along which the plurality of containers being conveyed and moving the plurality of containers along the path of travel. The method further comprises providing a light source (40,42) emitting light of a specific spectral distribution, the light source being positioned at one side of the path of travel, the containers being at least partly transparent or translucent to light at the specific spectral distribution, the fluid or liquid being at least partly transparent or translucent to light at the specific spectral distribution. Still further, the method comprises providing a camera (38,36) including a CMOS chip for detecting light at the specific spectral distribution emitted from the light source, the camera defining a field of view, the path of travel intersecting the field of view, the CMOS chip producing a digital image comprising a specific number of pixels, the camera registering a sequence of digital images as the container passes between the light source and the camera, selecting a part of each of the digital images, the part substantially corresponding to the outline of a specific container, transmitting each of the parts to a digital image processing unit, and finally, processing the part of sequence of digital images so as to detect the unwanted objects or faults in the specific container. |
