US 12,423,942 B2
Statistical classification systems and methods for distinguishing content items from conveyor belts in automated detection environments
Adnan M. Alattar, Tigard, OR (US)
Assigned to Digimarc Corporation, Beaverton, OR (US)
Filed by Digimarc Corporation, Beaverton, OR (US)
Filed on Jun. 10, 2024, as Appl. No. 18/738,602.
Application 18/738,602 is a continuation of application No. 17/827,365, filed on May 27, 2022, granted, now 12,008,795.
Claims priority of provisional application 63/194,888, filed on May 28, 2021.
Prior Publication US 2025/0086924 A1, Mar. 13, 2025
Int. Cl. G06V 10/20 (2022.01); G06K 7/14 (2006.01); G06T 1/00 (2006.01); G06V 10/50 (2022.01)
CPC G06V 10/255 (2022.01) [G06K 7/1413 (2013.01); G06K 7/1417 (2013.01); G06T 1/005 (2013.01); G06V 10/507 (2022.01); G06T 2201/0065 (2013.01)] 21 Claims
OG exemplary drawing
 
1. An image processing method of distinguishing content items from a conveyor belt comprising:
for an M×N pixel block within an image frame representing the conveyor belt and content items, where both M and N are positive integers, identifying a portion of the M×N pixel block, and dividing the portion into a plurality of sub-blocks;
for each sub-block of the plurality of sub-blocks;
determining an average or mean pixel value representing the each sub-block, said determining yielding a determined average or mean pixel value;
applying a statistical classifier to the determined average or mean pixel value to classify the each sub-block as representing either the conveyor belt or a content item, wherein the statistical classifier is based on a classifier determined from analysis of multiple image frames representing the conveyor belt; and
determining whether the M×N pixel block should be provided to a detector for encoded signal detection, based on whether a majority of the plurality of sub-blocks are classified as representing content items; and
providing the M×N pixel block to the detector based on a result of said determining whether the M×N pixel block should be provided to the detector for encoded signal detection.