Imaging Apparatus Keystone Correction Hash Verification
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Solution Overview
Problem
Ensuring the validity of images after correction in measurement processes, particularly in imaging systems used for measuring reinforcing bars, is challenging due to the need for recording both original and corrected images, which can be artificially altered.
Innovation Solution
An imaging apparatus that acquires images of reinforcing bars, corrects them using keystone correction based on the angle and subject distance, and generates a measurement image while associating the focus image, measurement image, and measurement result with a hash value to prevent alterations, ensuring the validity of the measurement image.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the image before correction is artificially corrected, then the measurement can be performed, but the validity of the image after correction becomes difficult to ensure
Solution Approach 1:
The patent applies preliminary action by recording the original image before correction and associating it with the corrected image through a hash value. This preliminary recording of the uncorrected image state allows for later verification that the corrected image corresponds to the original, ensuring validity while enabling the correction process to proceed.
Solution Approach 2:
The patent implements feedback by using hash values to verify the correspondence between the original and corrected images. The hash value acts as a feedback mechanism that can be used to detect alterations or mismatches, ensuring that the corrected image maintains validity by comparing it against the recorded original state.
2Reliability
If both the original and corrected images are recorded to ensure validity, then the reliability is improved, but the storage requirement and complexity increase
Solution Approach 1:
The patent uses copying by creating a hash value copy of the original image rather than storing the entire original image data. This hash copy contains sufficient information to verify validity while significantly reducing storage requirements and system complexity compared to storing both complete images.
Solution Approach 2:
The hash value serves as an intermediary between the original and corrected images. Instead of directly comparing the full original image with the corrected image, the system uses the hash value as an intermediary to verify correspondence, simplifying the verification process and reducing computational complexity.
Data Source
AI summary
According to the present invention, an information processing apparatus includes: an information acquiring unit which acquires data regarding a target; an information correction unit which corrects the data to generate corrected data to measure information regarding the target; and a recording control unit which records the data and the corrected data in association with each other.