Body Cavity Observation Apparatus Marker Position Detection
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Solution Overview
Problem
Existing body cavity observation apparatuses, such as abdominoscopes, are scaled large and costly due to the use of magnetic three-dimensional position sensors for detecting the tip of treatment tools, requiring additional machinery.
Innovation Solution
A body cavity observation apparatus that uses a marker position-detecting device with a pixel extracting device to identify and calculate the position of a marker on the treatment tool from captured images, eliminating the need for separate machinery by integrating the necessary circuits into the image processing system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a magnetic three-dimensional position sensor is used to detect the tip of the treatment tool, then the position detection accuracy is improved, but the apparatus size increases and the cost increases
Solution Approach 1:
The patent extracts the position detection function from a separate magnetic sensor system and integrates it into the image processing system. By detecting the marker on the treatment tool through image processing and calculating its position in the image coordinate system, the system achieves position detection without requiring an additional magnetic sensor apparatus, thus reducing device complexity while maintaining measurement precision
Solution Approach 2:
The patent combines the position detection function with the existing image processing system. The marker position detection, coordinate transformation, and treatment tool tip positioning are all performed within the integrated image processing circuit, merging multiple functions into a single system rather than using separate dedicated hardware components
2Measurement precision
If a magnetic three-dimensional position sensor is used to detect the tip of the treatment tool, then the position detection accuracy is improved, but the cost increases
Solution Approach 1:
The image processing system is designed to perform multiple functions: capturing images of the body cavity, detecting the marker on the treatment tool, calculating the marker position in the image coordinate system, and determining the treatment tool tip position. This multi-functional approach eliminates the need for dedicated magnetic sensor hardware, reducing manufacturing cost while maintaining position detection accuracy
Solution Approach 2:
The patent uses a visual marker (colored mark) on the treatment tool that can be detected and copied into digital form through image processing. By extracting and processing the marker image data, the system obtains position information without requiring expensive magnetic sensor hardware, achieving cost-effective position detection
Data Source
AI summary
A body cavity observation apparatus includes a treatment tool to be inserted into a body cavity of a subject with an insertion tool as a guide, an observation section attached to an opening of a body wall of the subject, a monitor for displaying the body cavity captured by the observation section, and a marker position-detecting device for detecting a position of a marker part applied to the treatment tool or insertion tool from an image showing the body cavity captured by the observation section. The marker position-detecting device includes a pixel extracting device for extracting a group of pixels in the same color as the color of the marker part from the image and a calculation device for calculating a position of the barycenter of the group of pixels as a position of the marker part. The pixel extracting device extracts a pixel whose output value of a color component included in a color of the marker part among R, G, and B output values outputted from an image pickup device of the observation section is bigger than an output value of a color component that is not included in a color of the marker part by a predetermined threshold of the group of pixels.