Adaptive Template Mark Detection for Image Position Estimation
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Solution Overview
Problem
Existing methods for detecting marks in images are inefficient and inaccurate due to variations in image size caused by changes in imaging distance, making it difficult to quickly and accurately estimate the position of specified images.
Innovation Solution
The use of multiple position detection marks, each formed by intersecting or contacting straight lines at a single point, allows for accurate detection of the position of a specified image by employing a template that matches the configuration around the intersection point, enabling fast and precise estimation regardless of image size variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed-size template is used to detect marks in images, then the detection process is simple, but the detection accuracy deteriorates when image size and mark size vary due to imaging distance changes
Solution Approach 1:
The patent applies dynamics by making the template size adaptive rather than fixed. The template size is dynamically adjusted based on the detected mark size in the image, allowing the detection system to maintain accuracy across varying imaging distances while keeping the overall process relatively simple.
2Reliability
If pixel-by-pixel tracking method is used to detect marks, then the detection can be performed, but the detection speed is slow
Solution Approach 1:
The patent extracts the key characteristic of the mark (its specific shape and size) to create a template. Instead of examining every pixel in the image, the system uses the extracted template to quickly locate and identify marks, significantly improving detection speed while maintaining reliability.
3Adaptability or versatility
If the mark size varies with imaging distance, then the image can be captured from different distances, but the template matching becomes difficult and position estimation accuracy deteriorates
Solution Approach 1:
The patent changes the parameter of template size to match the varying mark size. By adjusting the template size according to the detected mark dimensions, the system maintains accurate position estimation even when imaging distance varies, thus preserving both adaptability and precision.
Data Source
AI summary
According to the present invention, in a specified image position estimating apparatus, for, even if an original image varies in size to vary a size of a mark, detecting the mark in the original image fast and accurately to securely estimate the position of a specified image included in the original image, there are provided a position detection point detecting unit for, in a state where three or more position detection marks, each of which is made such that two or more straight lines intersect with each other or come into contact with each other at one position detection point, are affixed to the original image, detecting the position detection point of each of the position detection marks on the original image and a specified image position estimating unit for estimating the position of the specified image in the original image on the basis of the position detection point.