3D Measurement Camera with Self-Identifiable Marks for Image Coverage
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Solution Overview
Problem
The inefficiency in three-dimensional measurement due to the need for multiple images of large or complex objects, leading to unclear overlapping conditions and a shortage of necessary images, which complicates image processing and analysis.
Innovation Solution
An image photographing device that uses a single camera to photograph a measuring object with self-identifiable marks, allowing for efficient image capture by counting the number of photographing times for each marked area, grouping overlapping and non-overlapping areas, and displaying them in a photographing range image to ensure sufficient images are taken.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a larger number of images are previously set for compensating the shortage of images, then the reliability of three-dimensional measurement is improved, but the device complexity and ease of operation deteriorate due to more complication in image processing
Solution Approach 1:
The system automatically counts the number of photographing times for each marked area and provides feedback through the display unit, showing which areas have been photographed sufficient times (at least three times) and which areas need more photographing. This feedback mechanism guides the photographer to capture images of specific areas that require additional coverage, ensuring reliable three-dimensional measurement without requiring pre-planning of excessive images.
Solution Approach 2:
The system performs self-service by automatically extracting mark positions, counting photographing frequencies, and generating guidance information without requiring manual intervention. The control unit autonomously processes the photographed images, identifies marked areas, and determines which regions need additional photographing, reducing the complexity of image processing for the user.
2Reliability
If a larger number of images are previously set for compensating the shortage of images, then the reliability of three-dimensional measurement is improved, but the ease of operation deteriorates due to more complication in image processing
Solution Approach 1:
The display unit provides real-time feedback showing the photographing time number for each marked area, enabling the photographer to easily understand which areas have sufficient coverage and which need more images. This visual feedback simplifies the operation by clearly guiding the photographer without requiring complex manual analysis of image coverage.
Solution Approach 2:
The system automatically performs image processing tasks including mark extraction, photographing time counting, and generation of guidance information. This self-service capability eliminates the need for manual image analysis and processing, significantly easing the operational burden on the user while ensuring reliable measurement results.
3Measurement precision
If the number of photographing times for each marked area is monitored and enforced to be at least three times, then the measurement precision of characteristic points is improved, but the productivity decreases due to the need for multiple photographing passes
Solution Approach 1:
The system performs preliminary action by pre-marking specific areas on the measuring object with identifiable marks before photographing begins. These pre-placed marks serve as reference points that guide the photographing process, ensuring that critical areas are captured multiple times without requiring the photographer to manually plan or revisit locations, thus maintaining precision while improving efficiency.
Solution Approach 2:
The system provides immediate feedback by counting and displaying the photographing time number for each marked area in real-time. This feedback allows the photographer to efficiently determine which areas need additional photographing passes, reducing unnecessary re-photographing of already-sufficient areas and optimizing the overall photographing process for both precision and productivity.
Data Source
AI summary
An image photographing device for three-dimensional measurement sequentially photographs a measuring object in an overlapping manner by a single camera. The image photographing device for three-dimensional measurement photographs the measuring object with marks having self-other identifiable identification codes, extracts the marks from a photographed image, identifies the identification codes of the marks, defines an area of the measuring object in the photographed image into photographed areas surrounded by the marks, counts a number of photographing times of each of the photographed areas which are involved in different photographed images, groups the photographed areas in response to the number of photographing times, inputs positions of the marks in a coordinate space of a photographing range image of the measuring object, connects the positions of the marks input in the photographing range image such that mark symbols of the marks surrounding the photographed areas correspond to each other to match the photographed areas into the photographing range image, and indicates the photographed areas matched into the photographing range image.