US Patent No. 10,169,677

COUNTING STACKED INVENTORY USING IMAGE ANALYSIS


Patent No. 10,169,677
Issue Date January 01, 2019
Title Counting Stacked Inventory Using Image Analysis
Inventorship Xiaofeng Ren, Yarrow Point, WA (US)
Liefeng Bo, Seattle, WA (US)
Ohil Krishnamurthy Manyam, Bellevue, WA (US)
Avishkar Misra, Redmond, WA (US)
Sudarshan Narasimha Raghavan, Snoqualmine, WA (US)
Christopher Robert Towers, Seattle, WA (US)
Gopi Prashanth Gopal, Redmond, WA (US)
Yasser Baseer Asmi, Redmond, WA (US)
Assignee Amazon Technologies, Inc., Seattle, WA (US)

Claim of US Patent No. 10,169,677

1. A computing system, comprising:a processor; and
a memory coupled to the processor and storing program instructions that when executed by the processor causes the processor to at least:
receive from a first camera a first image of an inventory location, wherein the first image includes a representation of a plurality of inventory items vertically stacked and located at the inventory location;
determine from an inventory location data store, an item type corresponding to the inventory location;
select a first histogram of oriented gradients (“HOG”) model and a second HOG model, wherein:
the first HOG model corresponds to the item type and is representative of a first vertical stack of a first quantity of an item of the item type;
the second HOG model corresponds to the item type and is representative of a second vertical stack of a second quantity of the item of the item type, wherein the first quantity and the second quantity are different;
process the first image to generate an inventory item feature vector representative of the plurality of inventory items vertically stacked and represented in the first image;
compare the inventory item feature vector with the first HOG model and the second HOG model;
determine that the inventory item feature vector substantially matches the first HOG model; and
in response to a determination that the inventory item feature vector substantially matches the first HOG model, determine an inventory item count representative of a number of inventory items vertically stacked at the inventory location to be the first quantity.