Panoramic Video Tracking via Spherical Polar Coordinates
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Solution Overview
Problem
Conventional panoramic video processing methods are inefficient and result in a poor viewing experience due to the need for frame-by-frame processing, energy consumption, and difficulties in tracking objects across 360-degree angles, leading to picture distortion and tracking failures.
Innovation Solution
A method that determines reference polar coordinates for a target object in a spherical polar coordinate system, generates a tracking plane image based on these coordinates, and updates them to maintain object tracking across video frames, eliminating the need for frame-by-frame processing and improving tracking accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional frame-by-frame processing is used for panoramic videos, then complete video analysis is achieved, but processing efficiency is low and energy consumption is high
Solution Approach 1:
The patent applies preliminary action by pre-processing panoramic video frames to identify and extract key objects before full analysis. The system performs initial object detection and tracking setup in advance, establishing reference frames and tracking parameters proactively. This allows the main processing to focus only on updated regions rather than re-analyzing entire frames, significantly improving processing efficiency and reducing time loss.
2Reliability
If 360-degree panoramic tracking is implemented, then complete object tracking coverage is achieved, but picture distortion and tracking failures occur
Solution Approach 1:
The patent applies spheroidality by utilizing a spherical coordinate system to represent panoramic video data. Instead of forcing 360-degree panoramic images into flat rectangular projections that cause distortion, the system maintains the spherical topology of the panoramic data. This allows objects to be tracked accurately across the entire 360-degree field of view without the picture distortion that occurs during planar projection, thereby improving tracking reliability while eliminating harmful distortion effects.
3Ease of operation
If traditional panoramic video processing is used, then standard playback is achieved, but viewing experience is poor
Solution Approach 1:
The patent applies local quality by dynamically adjusting the playback view based on tracked object positions. Instead of providing uniform standard playback across the entire panoramic video, the system identifies regions containing objects of interest and enhances their visibility by adjusting the playback perspective to center on these objects. This creates a non-uniform but optimized viewing experience where important areas receive enhanced attention while maintaining overall processing efficiency through selective rather than comprehensive processing.
Data Source
AI summary
A method is provided. The method includes: generating a tracking plane image of a next video frame by using reference polar coordinates of a central position of a play plane image of a current video frame as a center based on a panoramic image of the next video frame in a spherical polar coordinate system; determining updated polar coordinates of a central position of a target object in the tracking plane image of the next video frame in the spherical polar coordinate system based on an object feature of the target object; and using the updated polar coordinates as the reference polar coordinates to re-perform the generating a tracking plane image of a next video frame by using reference polar coordinates as a center based on a panoramic image of the next video frame in a spherical polar coordinate system.