Camera Image Clipping for Orientation Stability
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Solution Overview
Problem
Conventional camera systems using fish-eye lenses experience sudden orientation changes of imaging objects in display images when they pass near the camera, due to rotation processing issues.
Innovation Solution
A camera device with a display-image generation unit that determines a clipping reference position, calculates a rotation angle based on the inclination and distance of the imaging object, and adjusts the image clipping to prevent sudden orientation changes, using a reference distance threshold and weighting processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If rotation processing is performed on clipped images from fish-eye lens images, then the imaging object orientation can be corrected, but sudden orientation changes occur when the imaging object passes near the camera
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the rotation angle based on the distance between the imaging object and the camera. When the object is close to the camera, a first rotation angle is applied; when the object is far, a second rotation angle is applied. This distance-based parameter adjustment prevents sudden orientation changes while maintaining correction accuracy.
Solution Approach 2:
The patent implements dynamics by making the rotation processing adaptive rather than fixed. The rotation angle is not constant but varies based on real-time distance measurements. This dynamic adjustment allows the system to respond appropriately to different imaging scenarios, preventing abrupt orientation changes near the camera while maintaining correctness at distances.
2Device complexity
If a fixed rotation angle is used for all imaging objects, then the processing is simple, but the display image quality deteriorates when objects are at different distances
Solution Approach 1:
The patent changes the rotation angle parameter based on the distance parameter. By measuring the distance between the imaging object and camera, the system selects appropriate rotation angles (first angle for close objects, second angle for distant objects). This parameter adaptation improves display quality without excessive complexity.
Solution Approach 2:
The system transitions from static (fixed rotation angle) to dynamic (variable rotation angle based on distance) processing. This dynamic approach allows the system to optimize display image quality for different imaging scenarios automatically, balancing processing complexity with performance improvement.
Data Source
AI summary
A camera device includes an imaging unit generating an imaging area image in which an imaging area is captured from above, and a display-image generation unit generating a display image of an imaging object moving in the imaging area by use of an clipped image clipped from the imaging area image. In this case, an clipping reference position P corresponding to the imaging object in the imaging area image is determined, and a reference distance r between an imaging reference position O corresponding to the imaging unit and the clipping reference position P in the imaging area image is calculated. When the reference distance r is short, a rotation angle θNEW for rotating the clipped image in generating the display image is calculated based on a reference angle θ corresponding to an inclination of the imaging object in the imaging area image and the reference distance r.