Multichannel Camera Calibration Using Common Magnification Centers
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Solution Overview
Problem
Existing methods for calibrating multichannel medical visualization systems require determining and storing parameter sets for each magnification level to reduce parallax, leading to high calibration complexity and outlay.
Innovation Solution
Determine magnification centers in each channel and define image portions using these centers, allowing for a single parameter set to be used across all magnification levels, enabling simplified and automated calibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If parameter sets are determined and stored for each magnification level to reduce parallax, then parallax reduction is achieved, but calibration complexity and outlay increase
Solution Approach 1:
The patent applies universality by determining a single magnification center that serves all magnification levels. Instead of determining separate parameter sets for each magnification level, one magnification center is used universally across the entire magnification range, reducing calibration complexity while maintaining parallax reduction effectiveness
Solution Approach 2:
The patent merges the calibration process by combining multiple magnification level calibrations into a single magnification center determination. The image portions from multiple magnification levels are merged to identify the common magnification center, eliminating the need for separate calibration procedures at each level
2Measurement precision
If mechanical alignment is performed to orient image representations, then alignment precision is improved, but system complexity and adjustment difficulty increase
Solution Approach 1:
The patent replaces mechanical alignment procedures with a digital/image processing approach. Instead of physically displacing and rotating cameras to achieve alignment, the system uses image processing methods to determine the magnification center and orient image representations, significantly easing adjustment while maintaining precision
Solution Approach 2:
The patent introduces the magnification center as an intermediary reference point that mediates between multiple channels. By orienting image representations relative to this common magnification center, the system achieves precise alignment without direct mechanical adjustment of camera positions and orientations
Data Source
AI summary
A method and a system for calibrating cameras of a multichannel medical visualization system, including capturing a capturing region respectively imaged via channels of the multichannel medical visualization system by a respective camera, determining a magnification center for each of the channels, setting at least two magnification levels of a common mechanical magnification optical unit, identifying an image region which does not move or which moves the least across the magnification levels for each of the channels in image representations which are captured, and, proceeding from the respectively determined magnification centers, defining an image portion for each of the channels in the captured image representations with the respectively identified magnification center as the center, and restricting an output of the captured image representations at all magnification levels to the image portion defined for the respective channel.