Unified Test Pattern for Simultaneous Image Calibration
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Solution Overview
Problem
Current image capture systems require multiple calibration methods, leading to high costs and time consumption, and often produce inaccurate three-dimensional images, depth maps, and image stitching due to geometric and color errors caused by assembly tolerance and manufacturing processes.
Innovation Solution
A calibration method using test patterns with geometric blocks to simultaneously perform geometric, color, and lens shading calibrations, capturing images from different angles and using a mechanical apparatus or stacked transparent display panels to generate accurate calibration parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple calibration methods are used to correct geometric and color errors, then calibration accuracy is improved, but calibration time and cost increase significantly
Solution Approach 1:
The patent combines multiple calibration methods (geometric calibration, color calibration, and lens shading calibration) into a single integrated calibration process. By using one test pattern that contains all necessary calibration information for all three calibration types, the system eliminates the need to perform separate calibration procedures, thereby reducing calibration time and cost while maintaining comprehensive calibration accuracy.
Solution Approach 2:
The test pattern designed in this patent serves multiple functions simultaneously: it provides geometric calibration data through its structured pattern, color calibration data through its color patches, and lens shading calibration data through its uniform regions. This multi-functional test pattern replaces the need for multiple specialized test patterns, resolving the contradiction between comprehensive calibration and efficient calibration process.
2Measurement precision
If multiple calibration methods are used to correct geometric and color errors, then calibration accuracy is improved, but device complexity and cost increase
Solution Approach 1:
The patent merges multiple calibration functionalities into a single test pattern and calibration process. Instead of requiring separate test patterns and procedures for geometric, color, and lens shading calibration, the system uses one unified test pattern that provides all necessary calibration data, thereby reducing device complexity and associated costs while maintaining comprehensive calibration capability.
Solution Approach 2:
The unified test pattern acts as a universal calibration tool that simultaneously supports geometric calibration, color calibration, and lens shading calibration. This multi-functional approach eliminates the need for multiple specialized calibration devices or test patterns, simplifying the overall calibration system while achieving comprehensive calibration accuracy.
3Reliability
If traditional calibration methods are used, then geometric and color errors are addressed separately, but the calibration process becomes time-consuming and costly
Solution Approach 1:
The patent merges the calibration processes for geometric errors, color errors, and lens shading into a single integrated operation. By capturing one image of the unified test pattern and extracting all necessary calibration parameters simultaneously, the system achieves complete calibration coverage while dramatically improving calibration efficiency and reducing the time and resources required compared to traditional separate calibration methods.
Data Source
AI summary
A calibration method of an image capture system includes an image capture device of at least one image capture device capturing an image including a plurality of intersection coordinates among a plurality of geometric blocks of a test pattern and an information of a color of each geometric block of the plurality of geometric blocks; an operation unit executing a first operation on the plurality of intersection coordinates within the image to generate a plurality of geometric calibration parameters; the operation unit executing a second operation on an information of a color of each geometric block of the plurality of geometric blocks within the image to generate a plurality of color calibration parameters; and a calibration unit calibrating the image capture device according to the plurality of geometric calibration parameters and the plurality of color calibration parameters.