Wearable information system having at least one camera

An information system, comprising:

• a camera;
• a processor operatively coupled to the camera;
• a device operatively coupled to the processor;
• and
• a memory device operatively coupled to the camera, the processor and the device, the memory device comprising instructions executable by the processor to:
• obtain, in a low-power mode of the information system, an image captured by the camera;
• extract, in the low-power mode, a first feature of an object in the image;
• generate, in the low-power mode, a higher level descriptor of the first feature;
• cause, in the low-power mode, the device to determine that the higher level descriptor matches a reference object feature descriptor;
• and
• activate, in response to determining the higher level descriptor matches the reference object feature descriptor, a high-power mode of the information system.

A computer readable medium comprising computer readable code executable by a processor to:

• obtain, in a low-power mode of a system, an image captured by the camera;
• extract, in the low-power mode, a first feature of an object in the image;
• generate, in the low-power mode, a higher level descriptor of the first feature;
• cause, in the low-power mode, a device to determine that the higher level descriptor matches a reference object feature descriptor;
• and
• activate, in response to determining the higher level descriptor matches the reference object feature descriptor, a high-power mode of the information system.

A method for managing a low-power and high-power mode of a system, comprising:

• obtaining, in a low-power mode of a system, an image captured by the camera;
• extracting, in the low-power mode, a first feature of an object in the image;
• generating, in the low-power mode, a higher level descriptor of the first feature;
• causing, in the low-power mode, a device to determine that the higher level descriptor matches a reference object feature descriptor;
• and
• activating, in response to determining the higher level descriptor matches the reference object feature descriptor, a high-power mode of the information system.