Patent ID: 11941863
Assignee: DATALOGIC IP TECH, S.R.L.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 7:
8. A computer-implemented method of detecting an image of a template object in a captured image, the method comprising:
comparing, by a processor, an image model of an imaged template object to multiple locations, rotations, and scales in the captured image, the image model defined by multiple model base point sets derived from contours of the imaged template object, each model base point set inclusive of a plurality of model base points that are positioned at corresponding locations associated with distinctive features of the imaged template object, and each corresponding model base point of the model base point sets (i) being associated with respective layers and (ii) having an associated gradient vector;
determining, by the processor, based on the comparison of the image model to the multiple locations, rotations, and scales in the captured image, whether and where the image of the object described by the image model is located in the captured - image; and
creating an image model by:
extracting gradients from the imaged object, the extracted gradients forming a gradient image;
rescaling the gradient image of the imaged object over a number of iterations to form gradient images from a full resolution gradient image to a rescaled gradient image that meets an end condition, the gradient images including X and Y gradient images;
extracting contours of the rescaled gradient images; and
selecting edge points of the extracted contours.