Abstract: A method of detecting unwanted objects or faults in containers containing a fluid or liquid includes: (a) moving the containers along a path of travel; (b) providing; a light source emitting light of a specific spectral distribution, wherein the containers and their contents are at least partly transparent or translucent at the specific spectral distribution; (c) providing a camera for detecting light at the specific spectral distribution, wherein (1) the path of travel intersects a field of view defined by the camera, and (2) the camera registers a sequence of digital images as the containers pass between the light source and the camera; (d) selecting a part of each of the digital images that corresponds to the outline of a specific container; and (e) processing a sequence of the parts of the digital images so as to detect the unwanted objects or faults in the specific container.

Abstract: An apparatus for beheading fish comprises a supporting plate 10, a cover plate 12, and a fluid bag 13 with a fluid inlet 14. The apparatus is open at both ends, and the fish is placed with the head free. Fluid under pressure is thereafter introduced through the inlet 14 into the fluid bag 13 which is thereby inflated to the shape as shown. As the bag is resilient, but is confined between the fish and the supporting plate 10 and the cover plate 12, respectively, the fish will thereby be seized between the bag and the supporting plate. An extremely effective and firm mechanical seizure of the fish is thereby achieved, even under moist, slimy or slippery conditions likely to prevail where fish are being processed. When the fish is seized by an appropriate pressure in the fluid bag 13, it is held so firmly that the head can be torn off.