Multi-Optical Camera Calibration Using Self-Captured Images
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Solution Overview
Problem
Existing methods for calibrating image capture apparatuses with multiple optical systems, especially those held by hand, require user intervention by placing a calibration pattern after every image capture, which is cumbersome and inefficient.
Innovation Solution
A processing apparatus that determines calibration parameters for optical systems using template matching and feature matching, eliminating the need for additional calibration patterns by utilizing images captured by the apparatus to adjust for deviations from designed positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If calibration is performed after every image capture using the method of Japanese Patent Laid-Open No. 2003-244521, then calibration precision is improved, but ease of operation deteriorates due to requiring user placement of calibration pattern
Solution Approach 1:
The image capture apparatus performs calibration automatically using images captured by itself, without requiring external calibration patterns or user intervention. The apparatus uses its own captured images to determine calibration parameters for the optical systems, enabling self-service calibration that maintains precision while improving ease of operation.
Solution Approach 2:
The patent uses captured images as an intermediary medium to perform calibration. Instead of requiring physical calibration patterns, the system uses the images captured by the optical systems themselves as the calibration target, allowing the apparatus to calibrate automatically based on the visual information already available.
2Measurement precision
If calibration is performed after every image capture, then calibration precision is improved, but productivity deteriorates due to time-consuming calibration process
Solution Approach 1:
The calibration process is integrated into the normal image capture operation, allowing calibration to occur continuously without interrupting productivity. The system uses images captured during regular operation as calibration data, eliminating the need for separate calibration steps and maintaining continuous useful action.
Solution Approach 2:
By performing self-service calibration using captured images, the system eliminates the need for separate calibration operations, thereby maintaining productivity while achieving precise calibration results without time-consuming external calibration procedures.
3Measurement precision
If additional calibration patterns are used, then calibration precision is improved, but device complexity increases due to requiring additional components
Solution Approach 1:
The patent extracts the calibration function from external calibration patterns and integrates it into the image capture process itself. By using captured images as the calibration target, the system eliminates the need for separate calibration components and reduces device complexity while maintaining calibration precision.
Solution Approach 2:
The captured images serve dual purposes: both as the final output for VR generation or distance measurement and as the calibration target for optimizing the optical systems. This multi-functionality eliminates the need for separate calibration patterns, reducing device complexity while maintaining precision.
Data Source
AI summary
A processing apparatus for calibrating an image capture apparatus having a first optical system, a second optical system, and an image capture sensor, each of the first and second optical systems including a wide-angle lens next to each other. The processing apparatus including an obtainment unit configured to obtain a first image acquired by image capture based on a light beam passing through the first optical system using the image capture sensor, the first image including a part of the second optical system, and a determination unit configured to determine, based on the part of the second optical system included in the first image, a first calibration parameter for calibrating the first optical system according to a deviation from a reference value related to the first optical system or the image capture sensor.