Endoscopic Image Processing Device Peak Detection Exposure Control
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Solution Overview
Problem
Endoscopic images often suffer from excessive brightness due to reflections from objects with higher luminance, leading to inadequate exposure control, resulting in either excessively dark or bright observation areas.
Innovation Solution
An image processing device with a peak detection unit that identifies first and second peaks in the luminance distribution of endoscopic images and an exposure control unit that adjusts parameters based on the luminance difference between these peaks to optimize image brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If exposure control is performed based on conventional methods, then the luminance of the endoscopic image can be adjusted, but the observation area becomes excessively dark when white areas are present
Solution Approach 1:
The patent segments the luminance distribution into multiple peaks, where the first peak represents white areas (reflections) and the second peak represents the observation area. By separately identifying these peaks and calculating the luminance difference between them, the system can perform exposure control that prevents the observation area from becoming excessively dark while accounting for the presence of bright reflections.
Solution Approach 2:
The patent implements feedback control by continuously monitoring the luminance distribution, detecting peaks, calculating luminance differences, and adjusting exposure parameters based on this information. The exposure control unit uses the calculated luminance difference as feedback to dynamically adjust exposure settings, ensuring that the observation area maintains appropriate brightness even when white areas are present in the image.
2Volume of moving object
If the light source unit and image sensor are positioned close to each other, then the endoscopic imaging system can be compact, but reflections from high luminance objects cause white areas in the image
Solution Approach 1:
The system uses feedback control to detect white areas through peak detection in the luminance distribution and adjusts exposure parameters accordingly. By monitoring the luminance difference between the first peak (white areas) and second peak (observation area), the system can compensate for reflections and maintain proper exposure in the observation area despite the compact configuration that causes reflections.
Data Source
AI summary
[Object] It is desirable to provide a technology capable of further appropriately adjusting the luminance of the endoscopic image.[Solution] Provided is an image processing device including: a peak detection unit configured to detect a first peak and a second peak in sequence from a high luminance side from a number-of-pixel distribution for each luminance of an endoscopic image based on imaging by an image sensor; and an exposure control unit configured to perform exposure control on a basis of a first luminance difference between the first peak and the second peak.