Patent ID: 11962876
Assignee: DIGIMARC CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  B  G  Y | IPC B  G  H

Claim 0:
1. A recycling method practiced in a waste management facility that processes an incoming material stream, the method including the acts:
(a) decoding first machine-readable payload data, comprising plural symbols, from imagery depicting a first item in said material stream;
(b) based on the first machine-readable payload data, determining that the first item comprises a first type of material;
(c) decoding second machine-readable payload data, comprising plural symbols, from imagery depicting a second item in said material stream;
(d) based on the second machine-readable payload data, determining that the second item comprises a second type of material different than the first type of material; and
(e) sorting said material stream in the waste management facility based on said determined types of materials;
detecting that a machine-readable indicia is present in said imagery;
the machine-readable indicia comprises a first digital watermark pattern conveyed by the first item, and said first item also conveys a second digital watermark pattern different than the first digital watermark pattern;
the material stream is moved by a conveyor belt at a speed, and the imagery comprises an image sequence captured at a frame rate, the sequence including first, second and third frames, the method further includes the acts:
analyzing plural image blocks in the first frame for a watermark clue;
detecting a watermark clue in a first image block of the first frame; and
in response to said detecting, identifying, in the second frame, one or more second image blocks for analysis based on said conveyor belt speed and said frame rate.