Patent Document ID: 10146375
Application ID: 15200062
Patent Status: 1

Claim One:
1. A system comprising: an image device including, an emitter to emit uniform infrared (IR) radiation that is to be converted to non-uniform IR radiation having an IR pattern, and a capturer to capture reflected non-uniform IR radiation, a pattern receiver to receive a feature IR pattern corresponding to non-uniform IR radiation reflected by skin of a user feature and an object IR pattern corresponding to non-uniform IR radiation reflected by an object, a filter to generate a modified IR pattern from the object IR pattern and to remove at least a part of the modified IR pattern from feature IR pattern, wherein the filter is to include, a convolver to generate a sharpened IR pattern as the modified IR pattern by modification of a pixel value in the object IR pattern to a minimum value or a maximum value based on a pre-defined spatial rule, and an eroder to generate an erosion IR pattern from the sharpened IR pattern by removal of at least a part of the sharpened IR pattern from the feature IR pattern based on a neighborhood of pixel values including the minimum value and the maximum value until a predetermined resolution threshold is met for the user feature, and a feature characterizer to characterize the user feature based on the feature IR pattern.