Dynamic Projection Switching for Wide-Angle Image Distortion Control
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Solution Overview
Problem
Existing panoramic image viewers face challenges in displaying wide-angle images on devices with limited calculation performance, leading to distortion at the edges of the field of view and difficulties in achieving high-speed, real-time display.
Innovation Solution
An image-processing system that generates a three-dimensional model and projects it using a combination of changing the viewing angle and viewing point, prioritizing these adjustments based on input values to minimize distortion and optimize performance on devices with limited calculation capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the field of view is widened by zooming operation, then the display range is expanded, but distortion is generated at the edge of the field of view
Solution Approach 1:
The patent applies dynamics by making the projection method adjustable and switchable based on the zoom level. The system dynamically transitions between cylindrical projection (for wide field of view) and perspective projection (for narrow field of view), allowing the projection characteristics to adapt to the current display requirements and minimize distortion at different zoom levels
Solution Approach 2:
The patent changes the projection parameter (projection method) based on the zoom level. When the zoom level exceeds a threshold, the system switches from cylindrical projection to perspective projection, thereby adjusting the projection characteristics to maintain image quality and reduce distortion at the edges of the field of view
2Manufacturing precision
If a complicated projection method is used to reduce distortion, then image quality is improved, but calculation performance requirement increases
Solution Approach 1:
The patent applies local quality by using different projection methods for different regions of the zoom range. For normal zoom levels, a simpler cylindrical projection is used, while for extreme wide-angle zoom levels exceeding a threshold, a perspective projection is applied. This localized approach ensures high image quality only where necessary (at extreme wide angles) while maintaining low computational complexity for the majority of正常使用 scenarios
3Productivity
If real-time display is achieved with high frame rate, then display speed is improved, but calculation load increases
Solution Approach 1:
The patent applies partial action by using the computationally intensive perspective projection only partially - specifically, only when the zoom level exceeds a predetermined threshold. For the majority of zoom levels within normal range, the simpler cylindrical projection is used. This partial application of complex processing enables real-time display performance while keeping the average calculation load manageable for mobile devices with limited processing power
Data Source
AI summary
An image-processing system includes a receiver which receives an input value defining an output range, a generator which generates a three-dimensional model having a target image attached to a three-dimensional conformation, a decision part which decides a position of a viewing point and a viewing angle in accordance with the input value, and a projector which projects the three-dimensional model from the viewing point, wherein the decision part changes a range of a target image inside a viewing field by changing the viewing angle preferentially when the input value is in a first range, and changes the range of the target image inside the viewing field by changing the viewing point preferentially when the input value is in a second range which is a wider-angle side than that of the first range.