Pattern detection using an optical navigation device
AssigneeAvago Technologies ECBU IP (Singapore) Pte. Ltd.
InventorTong Xie
Life of this patent
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Abstract
An optical navigation device that is capable of performing pattern detection. An optical navigation device according to the present teachings includes a image sensor that acquires a series of images of a surface and an image buffer for holding a template and a processor that detects a pattern on the surface by comparing the series of images to the template. The form factor of an optical navigation device enables its use as a pattern detection device for a wide variety of patterns on a wide variety of surfaces having a wide variety of forms.
Claims15
An optical navigation device, comprising:
- image sensor that acquires a series of images of a surface;
- image buffer for holding a template;
- and
- processor that detects a pattern on the surface by comparing more than one image in the series of images to the template,
- wherein the processor detects the pattern by determining a motion of the optical navigation device with respect to the surface in response to the series of images and generating a combined image by stitching together a subset of the images in the series in response to the motion and comparing the combined image to the template.
A pattern detection system, comprising:
- optical navigation device having a image sensor that acquires a series of images of a surface;
- and
- host computer that obtains the series of images from the optical navigation device and that detects a pattern by comparing more than one image in the series of images to a template,
- wherein the host computer generates a combined image by stitching together a subset of the images and compares the combined image to the template.
Dependencies are inferred from the claim text.