Capsule Endoscope Dynamic Frame Rate Control
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Solution Overview
Problem
Conventional capsule endoscopes waste energy by continuously capturing images, even when the device is stationary, due to their limited battery capacity and fixed frame rate, leading to repeated acquisition of identical images.
Innovation Solution
A capsule endoscope system that performs pre-exposure and pre-photometry to determine brightness changes, comparing acquired brightness information with previous data to decide when to capture and transmit images, thereby reducing unnecessary image acquisition and conserving power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the capsule endoscope continuously captures images at a fixed frame rate, then complete image coverage is ensured, but energy is wasted by repeatedly acquiring identical images when stationary
Solution Approach 1:
The patent implements dynamic frame rate adjustment based on detected motion state. When motion is detected, the frame rate increases to capture movement details; when stationary, the frame rate decreases to conserve energy. This dynamically adapts the imaging system to actual operational needs rather than maintaining a fixed frame rate.
Solution Approach 2:
The patent changes the temporal parameter (frame rate) based on motion detection results. By monitoring brightness changes between consecutive frames and comparing them against thresholds, the system adjusts the image capture frequency to match actual scene dynamics, reducing redundant captures during stationary periods.
2Duration of action of moving object
If the capsule endoscope is retained in the body cavity for a long period, then diagnostic coverage is improved, but battery capacity is depleted faster due to continuous imaging
Solution Approach 1:
The patent implements periodic motion detection and frame rate adjustment cycles. Instead of continuous high-rate imaging, the system periodically checks for motion and adjusts imaging frequency accordingly, creating a rhythm of active capture during movement and energy conservation during stationary periods.
Solution Approach 2:
The system dynamically changes the temporal sampling rate based on motion state, allowing extended observation duration by adapting energy consumption to actual diagnostic needs rather than maintaining constant high-rate imaging throughout the entire observation period.
3Measurement precision
If images are captured at high frame rate, then motion details are captured accurately, but energy consumption increases
Solution Approach 1:
The system dynamically adjusts frame rate based on detected motion state, maintaining high frame rates only when motion is detected and reducing frame rates when stationary, thus matching measurement precision to actual motion requirements.
Solution Approach 2:
The temporal parameter (frame rate) is changed based on motion detection thresholds, ensuring accurate motion capture when needed while conserving energy during stationary periods by lowering the sampling rate.
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
This approach allows the capsule endoscope to detect movement and capture images only when necessary, reducing power consumption and preventing useless image pickup, while maintaining diagnostic image quality.
Implementation Method 1
picks up images of the subject while moving through the body cavity
Implementation Method 2
acquire brightness information acquired by the image pickup section
Data Source
AI summary
A capsule endoscope includes an image pickup device, a memory configured to store brightness information acquired by the image pickup device, and a control section configured to perform control to compare the brightness information acquired by the image pickup device with brightness information acquired by the image pickup device immediately before acquiring the brightness information and stored in the memory, cause the image pickup device to acquire brightness information when the comparison result is no greater than a threshold, compare the acquired brightness information with the brightness information acquired by the image pickup device immediately before and stored in the memory, and cause the image pickup device to pick up an image when the comparison result is greater than the threshold and cause the memory to store the picked-up image or cause an image transmitting section provided in the capsule endoscope to transmit the image to outside the capsule endoscope.