Wide-Angle Image Distortion Correction for Detection Line Setting
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Solution Overview
Problem
Monitoring cameras with wide-angle lenses, such as omnidirectional cameras with fish-eye lenses, face challenges in accurately setting measurement lines due to distortion, making it difficult to designate desired positions for counting people or objects effectively.
Innovation Solution
An information processing apparatus and method that includes a reception unit for designating positions on a wide-range captured image, a generation unit for performing distortion correction to create a corrected partial region image, and a setting unit for accurately setting a passage detection line on the corrected image, allowing users to easily designate and correct the position of detection lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a wide-angle lens is used to capture a wide range of images for monitoring, then the monitoring coverage is improved, but image distortion increases making it difficult to accurately set measurement lines
Solution Approach 1:
The patent divides the wide-range captured image into multiple partial region images. By segmenting the distorted wide-angle view into smaller manageable sections, each partial region can be processed and corrected individually, allowing for more accurate position designation in each segment while maintaining the broad monitoring coverage of the original wide-angle lens.
Solution Approach 2:
The patent applies distortion correction processing that transforms the geometric parameters of the partial region images. By changing the spatial parameters through correction algorithms, the distorted coordinates in wide-angle images are converted to accurate metric coordinates, enabling precise measurement line setting while preserving the wide monitoring area.
2Measurement precision
If distortion correction is applied to the entire wide-range captured image, then measurement accuracy is improved, but processing time and computational load increase
Solution Approach 1:
The patent segments the large computational task of correcting the entire wide-range image into smaller sub-tasks by dividing it into multiple partial region images. Each partial region is corrected independently and more efficiently, reducing the overall processing time compared to correcting the entire image at once, while still achieving accurate position designation in all regions.
Solution Approach 2:
The patent applies distortion correction selectively to only the necessary partial regions rather than the entire wide-range image. This partial action approach achieves sufficient measurement accuracy for monitoring purposes without the excessive computational burden of processing the complete wide-angle image, thereby reducing processing time.
Data Source
AI summary
There is provided with an information processing apparatus. A designation of a position in a wide range captured image captured by an image capture apparatus that has an optical system for capturing the wide range captured image is received. A corrected partial region image that is obtained by performing a distortion correction, that reduces a distortion due to the optical system of the image capture apparatus, on a partial image corresponding to the position designated on the wide range captured image is generated. A passage detection line, for detecting a passage of a moving object, is set on the corrected partial region image in accordance with a designation by a user.