Back to results
US 8,525,874 B2Granted
Assistance system for visually handicapped persons
AssigneeKoninklijke Philips N.V.
InventorsRichard Daniel Willmann, Gerd Lanfermann, Juergen Te Vrugt, Edwin Gerardus Johannus Maria Bongers
Life of this patent
Estimating the term…
Abstract
An assistance system for visually handicapped persons with visual impair in a part of their visual field aims at providing a technical solution for these persons, informing them actively about objects or movements in the visually impaired side, by way of body-worn sensors.
Claims19
An assistance system for a visually handicapped person comprising:
- a first orientation sensor being adapted for arrangement proximal to a trunk of the person, for determining a movement of the person;
- a second orientation sensor being adapted for arrangement at a head of the person, for determining a movement and orientation of the head of the person;
- at least one motion detector for detecting a movement or presence of an object, the motion detector being adapted for arrangement at the head of the person;
- and
- an evaluation system for comparing data from the motion detector and the first and second orientation sensors,
- wherein the evaluation system comprises a microprocessor configured to compute a global optical flow from the data of the first and second orientation sensors, the microprocessor comparing the computed global optical flow to an actual optical flow detected by the motion detector to determine the presence of moving objects.
3 more elements
A method for assisting a visually handicapped person, comprising the acts of:
- a1) determining a movement of the person by a first orientation sensor which is arranged proximal to a trunk of the person,
- a2) determining a viewing direction of the person by a second orientation sensor which is arranged at a head of the person,
- b) computing a global optical flow from the data of the first and second orientation sensor by a microprocessor;
- c) detecting an actual optical flow by at least one motion detector which is arranged at the head of the person;
- and
- d) identifying a moving object by comparing the computed global optical flow to the actual optical flow.
3 more elements
Dependencies are inferred from the claim text.