Optical Navigation Device Pattern Detection
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Solution Overview
Problem
Existing pattern detection devices are expensive and limited in their ability to detect patterns on non-scannable surfaces, such as images on walls or boxes, due to their specialized and costly nature.
Innovation Solution
An optical navigation device equipped with an image sensor, processor, and image buffer that compares a series of images to a template, enabling pattern detection on various surfaces using pre-existing mechanisms, such as optical navigation mice or light pens, and allowing for the detection of patterns larger than the device's field of view by stitching images together.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a specialized pattern detection device with optics and image sensor is used, then pattern detection capability is improved, but device cost increases
Solution Approach 1:
The patent applies multi-functionality by enabling the optical navigation device to perform both its original navigation function and pattern detection function. The image sensor and processor are utilized for dual purposes: tracking surface movement for navigation and capturing image sequences for pattern recognition, thereby eliminating the need for separate specialized devices and reducing overall system cost.
Solution Approach 2:
The optical navigation device performs pattern detection using its own pre-existing image sensor and processor components without requiring external specialized equipment. The device leverages its inherent capabilities to serve the additional function of pattern recognition, reducing dependency on expensive external specialized devices.
2Reliability
If a personal computer with a scanner is used for pattern detection, then pattern recognition is achieved, but cost and limited applicability increase
Solution Approach 1:
The patent employs dynamic image capture by acquiring multiple images at different positions as the device moves across the surface. This dynamic approach enables the system to adapt to various surface geometries and patterns, capturing the necessary image sequences for pattern recognition regardless of whether the surface is flat or three-dimensional, thereby enhancing versatility.
Solution Approach 2:
The system transitions from static single-image scanning to dynamic multi-image sequence capture. By acquiring images at multiple positions and orientations, the system can handle patterns on three-dimensional surfaces and objects, expanding applicability beyond the limitations of traditional two-dimensional scanners.
3Measurement precision
If traditional scanners are used, then pattern detection on flat surfaces is possible, but inability to detect patterns on non-scannable surfaces occurs
Solution Approach 1:
The dynamic image acquisition capability allows the device to move freely across different surface types, capturing patterns on three-dimensional objects and non-flat surfaces. The system adapts to various geometries by acquiring images at multiple positions, enabling pattern detection on surfaces that traditional static scanners cannot access.
Solution Approach 2:
The patent replaces the mechanical scanning mechanism of traditional scanners with an optical navigation-based image capture system. This substitution enables the device to detect patterns on three-dimensional surfaces and objects by capturing image sequences from multiple viewpoints, overcoming the physical limitations of contact-based scanning.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The optical navigation device provides a cost-effective and versatile solution for pattern detection on diverse surfaces, including those that cannot be fed into a scanner, by leveraging existing technologies and enhancing processing capabilities for pattern recognition.
Implementation Method 1
an image sensor that acquires a series of images of a surface
Data Source
AI summary
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.