Image Capture Tilt Detection via Frequency Analysis
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Solution Overview
Problem
Existing techniques face difficulties in capturing image data of print images with embedded additional information when there is a three-dimensional inclination between the image capturing unit and the print image, leading to suboptimal data acquisition.
Innovation Solution
An information processing method that involves capturing images using an image capturing unit, performing frequency analysis on partial image data to obtain distance information, and calculating inclination information to determine the relative tilt state between the image capturing unit and the print image, allowing for accurate data acquisition despite inclination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If frequency analysis is performed on the entire captured image, then comprehensive distance information can be obtained, but processing time and computational load increase significantly
Solution Approach 1:
The captured image is divided into multiple partial image data regions, and frequency analysis is performed separately on each region to obtain distance information for different areas. This segmentation approach reduces the computational load and processing time compared to analyzing the entire image at once, while still providing comprehensive distance information across the image.
2Measurement precision
If the image capturing unit is held stationary to maintain stable positioning, then alignment accuracy improves, but the system cannot adapt to different viewing angles and distances
Solution Approach 1:
The system detects changes in distance information across different regions of the captured image to determine the tilt state of the image capturing unit. By analyzing variations in distance parameters across the image, the system can identify inclination angles and adjust the reading process accordingly, enabling adaptation to different viewing angles while maintaining positioning accuracy.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables effective capture and reading of additional information from print images even when there is a tilt between the image capturing device and the print image, ensuring robustness and accuracy in data retrieval.
Implementation Method 1
capturing an image of a captured image in which additional information having a specified frequency characteristic is embedded
Implementation Method 2
performing a frequency analysis on partial image data of the captured image data, the partial image data corresponding to a specified area of the captured image, to obtain distance information
Data Source
AI summary
The present disclosure provides a technique to obtain a tilt state occurring between an image capturing unit and a print image having additional information embedded in it without using the visible image. In the technique, an image of a print image in which additional information having a specified frequency characteristic is embedded is captured using an image capturing unit to obtain captured image data. A frequency analysis is performed on partial image data corresponding to a specified area in the obtained captured image data, to obtain distance information on a distance between the specified area and the image capturing unit. Inclination information indicating a state of a relative inclination between the image capturing unit and the print image is obtained based on this distance.