Endoscope Illumination Control for Consistent Multi-Light Brightness
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Solution Overview
Problem
Existing endoscope systems face issues with inconsistent brightness in endoscopic images due to varying spectral sensitivity of observation targets under different illumination types, leading to images that are too dark or too bright when adjusting brightness based on a single key illumination light.
Innovation Solution
An endoscope system that includes a processor to calculate and store light emission amounts for multiple illumination types, allowing for targeted brightness adjustments by selecting appropriate light emission amounts for each type of illumination light based on past emission information and scheduled frames.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If brightness adjustment is performed based on a single key illumination light, then the brightness control process is simple, but the endoscopic images become too dark or too bright when using other types of illumination light due to varying spectral sensitivity
Solution Approach 1:
The patent segments the brightness control process by separating the control of different illumination lights. Instead of using a single key illumination light for all brightness adjustments, the system independently calculates and controls light emission amounts for each type of illumination light (first illumination light, second illumination light, etc.) based on their respective spectral characteristics and the observation target's spectral sensitivity. This segmentation allows each illumination type to be optimized independently, resolving the contradiction between simple control and accurate brightness.
2Measurement precision
If multiple types of illumination light are used for different observation purposes, then the observation accuracy is improved, but the brightness consistency across different images deteriorates
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the light emission amount for each illumination type based on the observation target's spectral sensitivity characteristics. The system calculates a light emission amount for each illumination light type by considering the spectral sensitivity of the observation target and the desired brightness level. This allows the system to maintain brightness consistency across different illumination types while preserving the benefits of using multiple illumination types for different observation purposes.
3Manufacturing precision
If the light emission amount is calculated for each illumination type separately, then the brightness accuracy for each image is improved, but the processing complexity increases
Solution Approach 1:
The patent implements preliminary action by pre-calculating and storing spectral sensitivity characteristics of the observation target before actual imaging. The system calculates a light emission amount for each illumination light type in advance based on the spectral sensitivity and desired brightness, then stores this information for use during actual imaging operations. This preliminary calculation reduces the processing complexity during real-time imaging while maintaining high brightness accuracy for each illumination type.
Data Source
AI summary
A processor generates an endoscopic image in a frame for calculating a light amount, calculates a light emission amount that is an amount of illumination light, in which brightness of the endoscopic image is a target brightness, stores the light emission amount as a storage light emission amount, selects the latest storage light emission amount as a designated light emission amount from among one or more storage light emission amounts in accordance with the type of the illumination light, and causes a light source device to emit the illumination light with the designated light emission amount in a scheduled emission frame after the frame for calculating a light amount in a time series.