Image Processing Apparatus Corrects Wide-Angle Lens Distortion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wide-angle lens images often result in low analysis accuracy due to oblique orientations of subjects, which conventional distortion correction techniques struggle to address effectively, leading to incomplete detection of human figures and inaccurate counting.
Innovation Solution
An image processing apparatus identifies vertical lines in a captured image, generates transformation coefficients for geometric correction, and applies simple geometric transformations to orient subjects vertically, enhancing detection accuracy by correcting image distortions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional distortion correction techniques are used on wide-angle lens images, then lens distortion is reduced, but subject orientation remains oblique leading to low analysis accuracy
Solution Approach 1:
The patent applies preliminary geometric transformation to correct subject orientation before distortion correction. By first identifying oblique lines and calculating transformation coefficients to orient subjects vertically, the system prepares the image in an optimal state for subsequent distortion correction and analysis operations.
Solution Approach 2:
The patent changes geometric parameters of the image through two-stage transformation: first applying orientation correction using calculated transformation coefficients to make subjects vertical, then applying distortion correction. This sequence of parameter changes resolves both orientation and distortion issues.
2Area of stationary object
If wide-angle lens is used to capture images, then wide-range display is achieved, but lens distortion causes low detection accuracy
Solution Approach 1:
The patent performs preliminary orientation correction before distortion correction by identifying oblique lines and applying geometric transformation. This preparation step ensures that subjects are properly oriented before the distortion correction process, maximizing detection accuracy across the wide display range.
Solution Approach 2:
The patent implements a continuous two-stage correction process: orientation correction followed by distortion correction. This continuous application of useful actions ensures that both geometric issues are addressed systematically, maintaining high detection accuracy across the entire wide-angle image.
3Measurement precision
If simple geometric transformation is applied to correct orientation, then subject alignment improves, but additional processing steps are required
Solution Approach 1:
The patent applies simple geometric transformation as a preliminary step before distortion correction. By identifying oblique lines and calculating transformation coefficients, the system performs orientation correction in a straightforward manner that improves subject alignment without requiring complex algorithms.
Data Source
AI summary
An image processing apparatus includes an identification unit configured to identify, in a first image, a line corresponding to a vertical line in a real space, and a correction unit configured to correct the first image to be a second image based on respective positions of at least two lines identified in the first image.