Endoscope Illumination Control for Consistent Multi-Type Brightness
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Solution Overview
Problem
Existing endoscope systems face issues with inconsistent brightness levels 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 precise control of brightness in each image frame, and switches between illumination types based on stored emission information to achieve target brightness levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If brightness adjustment is performed using a single key illumination light, then the control process is simplified, but the brightness of images obtained with other illumination types becomes inconsistent (too dark or too bright)
Solution Approach 1:
The patent divides the brightness control process into separate segments for each illumination type. Instead of using a single key illumination light for all adjustments, the system performs exposure control independently for wide band illumination light and narrow band illumination light, ensuring appropriate brightness for each image type without interference from spectral sensitivity variations.
2Manufacturing precision
If exposure control is performed for each illumination type independently, then the brightness accuracy for each image type is improved, but the control process complexity increases
Solution Approach 1:
The patent merges the exposure control functions for multiple illumination types into a unified control system. The processor coordinates exposure settings for wide band illumination light and narrow band illumination light together, managing the complexity centrally while ensuring each illumination type receives appropriate exposure control for optimal brightness accuracy.
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.