Detection of items in an object
First Claim
1. A method for detecting a three-dimensional item inside an inspection object, the method comprising:
- detecting edges of a plurality of items contained in a transmission image of an inspection object in order to produce an edge image, at least some of the items being three-dimensional; and
detecting within the plurality of items a three-dimensional item having at least one symmetry property by determining a symmetry line of the items contained in the transmission image, the three-dimensional item having at least one symmetry property comprising a bottle, the symmetry line determined by detecting pairs of edge picture elements of the edge image that are positioned symmetrically to each other relative to the symmetry line that is to be determined, wherein, in the determining a symmetry line in the edge image, the only edge picture elements that are taken into account are those for which the symmetry line in the transmission image lies in the image region of the three-dimensional item to which the edge picture elements belong, determining, in the respective transmission images, a direction for the respective symmetry line by determining a bottom of the bottle and a neck of the bottle in the respective transmission images based on a difference in thickness between the bottom of the bottle and the neck of the bottle; and
producing an output classification associated with the item detected.
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Accused Products
Abstract
This disclosure relates to a system and method for detecting an item having at least one symmetry property inside an inspection object based on at least one transmission image. The method includes the steps: (a) detection of edges of individual items contained in the transmission image in order to produce an edge image; and (b) detection of the item by determining a symmetry line that can be associated with an item with at least one symmetry property contained in the transmission image based on pairs of edge picture elements of the edge image that are positioned symmetrically to each other relative to the symmetry line; and in step (b), in determining the symmetry line in the edge image, the only edge picture elements that are taken into account are those for which the symmetry line lies in an item contained in the transmission image, to which item the edge belongs.
13 Citations
17 Claims
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1. A method for detecting a three-dimensional item inside an inspection object, the method comprising:
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detecting edges of a plurality of items contained in a transmission image of an inspection object in order to produce an edge image, at least some of the items being three-dimensional; and detecting within the plurality of items a three-dimensional item having at least one symmetry property by determining a symmetry line of the items contained in the transmission image, the three-dimensional item having at least one symmetry property comprising a bottle, the symmetry line determined by detecting pairs of edge picture elements of the edge image that are positioned symmetrically to each other relative to the symmetry line that is to be determined, wherein, in the determining a symmetry line in the edge image, the only edge picture elements that are taken into account are those for which the symmetry line in the transmission image lies in the image region of the three-dimensional item to which the edge picture elements belong, determining, in the respective transmission images, a direction for the respective symmetry line by determining a bottom of the bottle and a neck of the bottle in the respective transmission images based on a difference in thickness between the bottom of the bottle and the neck of the bottle; and producing an output classification associated with the item detected. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A system for detecting an item inside an inspection object, the system comprising:
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an inspection device configured to obtain a transmission image of an inspection object; at least one computing device in communication with the inspection device the at least one computing device including; a memory configured to store code; a processor coupled to the memory, the processor configured to execute the code to cause the processor to; receive a transmission image from the inspection device; detect edges of a plurality of items contained in a transmission image of an inspection object in order to produce an edge image, at least some of the items being three-dimensional; and detect within the plurality of items a three-dimensional item having at least one symmetry property by determining a symmetry line of the items contained in the transmission image, the three-dimensional item having at least one symmetry property comprising a bottle, the symmetry line determined by detecting pairs of edge picture elements of the edge image that are positioned symmetrically to each other relative to the symmetry line that is to be determined, wherein, in the determining a symmetry line in the edge image, the only edge picture elements that are taken into account are those for which the symmetry line in the transmission image lies in the image region of the three-dimensional item to which the edge picture elements belong, determining, in the respective transmission images, a direction for the respective symmetry line by determining a bottom of the bottle and a neck of the bottle in the respective transmission images based on a difference in thickness between the bottom of the bottle and the neck of the bottle; and produce an output classification associated with the item detected. - View Dependent Claims (14, 15, 16)
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17. A method for detecting a three-dimensional item inside an inspection object, the method comprising:
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detecting edges of a plurality of items contained in a transmission image of an inspection object in order to produce an edge image, at least some of the items being three-dimensional; and detecting within the plurality of items a three-dimensional item having at least one symmetry property by determining a symmetry line of the items contained in the transmission image, the three-dimensional item having at least one symmetry property comprising a bottle, the symmetry line determined by detecting pairs of edge picture elements of the edge image that are positioned symmetrically to each other relative to the symmetry line that is to be determined, wherein, in the determining a symmetry line in the edge image, the only edge picture elements that are taken into account are those for which the symmetry line in the transmission image lies in the image region of the three-dimensional item to which the edge picture elements belong; segmenting of a three-dimensional item with symmetry properties in the edge image by determining an outline of the item, wherein when there are two determined edges that are determined to be symmetrical to a symmetry line, missing parts of the edges are filled in mirror-symmetrically to the symmetry line if the missing parts lie in an overlap region in which the item and the edge of the item are partially overlapped by another item, and wherein the overlap region is determined based on intensity values in the transmission image; and producing an output classification associated with the item detected.
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Specification