Panoramic Imaging Optical Axis Offset for Pixel Utilization
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Solution Overview
Problem
Existing panoramic surveillance systems with 360-degree horizontal view generate excessive useless information and low pixel utilization when vertical angles of view are equal and the horizontal angle is less than 360 degrees, leading to inefficient use of imaging device pixels.
Innovation Solution
An adjustment method for panoramic imaging that determines the horizontal and vertical angles of view and side lengths of the imaging device, adjusting the circular panoramic image and relative positions of the panoramic lens and imaging device to optimize pixel utilization by making the image diameter larger than the shorter side length of the rectangular-shaped imaging device and positioning the geometric center away from the optical axis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the optical axis passes through the geometric center of the imaging device with 360-degree horizontal view, then the panoramic coverage is complete, but the pixel utilization rate decreases and useless information increases
Solution Approach 1:
The patent applies asymmetry by intentionally offsetting the optical axis from the geometric center of the imaging device. This asymmetric positioning allows the circular panoramic image to be aligned such that its diameter extends beyond the shorter side length of the rectangular imaging device, thereby eliminating unnecessary peripheral pixels and improving pixel utilization rate while maintaining complete panoramic coverage.
2Shape
If the diameter of circular panoramic image equals the shorter side length of imaging device, then the image fits within the device boundaries, but the pixel utilization is low when horizontal angle is less than 360 degrees
Solution Approach 1:
The patent changes the parameter relationship between image diameter and imaging device dimensions. Instead of setting the image diameter equal to the shorter side length, the patent positions the optical axis such that the image diameter becomes larger than the shorter side length. This parameter change allows better utilization of pixels when the horizontal angle of view is less than 360 degrees, improving productivity while maintaining proper image boundaries.
Data Source
AI summary
A regulating method for panoramic imaging, a regulating apparatus for the same, and a panoramic imaging apparatus are provided. The method includes: determining the circular viewing angle and the pitch angle of the current zone which is ready for being detected, determining the side length of the rectangular imaging part in the panoramic imaging apparatus, regulating the round panoramic image in the focal plane formed by a panoramic lens according to the side length of the rectangular imaging part and the circular viewing angle and the pitch angle of the current zone which is ready for being detected, in order to make the diameter of the round panoramic image in the focal plane formed by the panoramic lens greater than the length of the shorter side of the rectangular imaging part.