See-through computer display systems

A method for searching for a user identified pattern using a head worn computer that includes a sensor, comprising:

• causing a user to select an item in a search mode of the head-worn computer (“HWC”);
• causing the HWC to gather data with the sensor, wherein the sensor is adapted to collect infrared light, and analyzing the data to compare patterns in the data to the selected item;
• and
• causing the HWC to alert the user when a potential match occurs between a pattern in the gathered data and the selected item.