Variable Moving Amount for Fisheye Image Clipping
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Solution Overview
Problem
Conventional omnidirectional cameras face challenges in fine-tuning the clipping portion of fisheye images due to a fixed moving amount, which is not suitable for objects at different distances from the center, leading to difficulties in accurately adjusting the image clipping, especially for peripheral objects that appear smaller.
Innovation Solution
The system determines a variable moving amount for the clipping portion based on its position within the fisheye image, using formulas that adjust the moving amount based on the distance from the center and the installation mode of the camera, allowing for more precise control of image clipping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fixed moving amount is used for clipping portions in a fisheye image, then the clipping portion near the center can be adjusted easily, but the clipping portion on the peripheral side includes distant objects that look comparatively small, making fine tuning difficult
Solution Approach 1:
The patent applies local quality by setting different moving amounts for clipping portions based on their position in the fisheye image. Clipping portions near the center use a first moving amount, while those on the peripheral side use a second moving amount that is smaller. This localized adjustment strategy ensures that each region's clipping portion can be finely tuned according to its specific characteristics, resolving the contradiction between ease of operation and measurement precision.
Solution Approach 2:
The patent implements dynamics by making the moving amount variable rather than fixed. The system dynamically adjusts the moving amount based on the distance of the clipping portion from the center of the fisheye image. This dynamic adjustment allows the system to adapt to different positions, providing both ease of operation for central portions and precision for peripheral portions.
2Device complexity
If the clipping portion moves by a fixed amount in a specified direction, then the adjustment process is simple, but peripheral clipping portions change more largely than central ones, causing loss of control
Solution Approach 1:
The patent applies local quality by implementing position-dependent moving amounts. The system divides the fisheye image into different regions (central and peripheral) and assigns different moving amounts to each region. This localized approach maintains simple adjustment mechanisms while improving control accuracy by accounting for the geometric characteristics of each region.
Solution Approach 2:
The patent changes the parameter of moving amount based on the position of the clipping portion. By modifying this parameter dynamically according to distance from the center, the system achieves both simplicity in the adjustment mechanism and reliability in control accuracy, as the parameter adaptation compensates for the geometric distortion in fisheye images.
Data Source
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Figure 3A~3B
AI summary
Position determination means determines, in a fisheye image, a position of a clipping portion clipped from the fisheye image. Based on the position of the clipping portion determined by the position determination means, determination means determines a moving amount of the clipping portion for moving the clipping portion.