Methods and apparatus to determine the dimensions of a region of interest of a target object from an image using target object landmarks
AssigneeThe Nielsen Company (US), LLC
InventorKevin Deng
Life of this patent
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Abstract
Methods and apparatus to determine the dimensions of a region of interest of a target object and a class of the target object from an image using target object landmarks are disclosed herein. An example method includes identifying a landmark of a target object in an image based on a match between the landmark and a template landmark; classifying a target object based on the identified landmark; projecting dimensions of the template landmark based on a location of the landmark in the image; and determining a region of interest based on the projected dimensions, the region of interest corresponding to text printed on the target object.
Claims18
A tangible computer readable storage medium comprising instructions which, when executed, cause one or more processors to at least:
- identify a first landmark edge by processing transition points in a first side search area corresponding to a first edge of a template landmark that corresponds to a landmark identified in an image;
- identify a second landmark edge by processing second transition points in a second side search area corresponding to a second edge of the template landmark;
- define a first side edge corresponding to the first landmark edge;
- define a second side edge corresponding to the second landmark edge;
- and
- identify text lines within a region of the image defined by the first side edge and the second edge.
An apparatus comprising:
- memory;
- and
- processing circuitry to:
- identify a first landmark edge by processing transition points in a first side search area corresponding to a first edge of a template landmark that corresponds to a landmark identified in an image;
- identify a second landmark edge by processing second transition points in a second side search area corresponding to a second edge of the template landmark;
- define a first side edge corresponding to the first landmark edge;
- define a second side edge corresponding to the second landmark edge;
- and
- identify text lines within a region of the image defined by the first side edge and the second edge.
An apparatus comprising:
- means for storing a template landmark;
- means for identifying text lines within a region of an image, the means for identifying to:
- identify a first landmark edge by processing transition points in a first side search area corresponding to a first edge of the template landmark that corresponds to a landmark identified in the image;
- identify a second landmark edge by processing second transition points in a second side search area corresponding to a second edge of the template landmark;
- define a first side edge corresponding to the first landmark edge;
- define a second side edge corresponding to the second landmark edge;
- and
- identify the text lines within the region of the image defined by the first side edge and the second edge.
Dependencies are inferred from the claim text.