Pattern detection using an optical navigation device
First Claim
Patent Images
1. 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.
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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.
17 Citations
15 Claims
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1. An optical navigation device, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A pattern detection system, comprising:
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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. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification