Panoramic Video Conferencing via Projection Matrix Stitching
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Solution Overview
Problem
Conventional video conferencing systems require specialized and expensive equipment to provide panoramic views, making them inaccessible for cost-effective solutions that can utilize common cameras and monitors for wide-angle conferencing.
Innovation Solution
A system that uses an array of common cameras to capture adjacent views, encodes them independently, and generates a projection matrix to align and combine these views into a panoramic image, allowing for panoramic video conferencing with lower-cost equipment by transmitting the encoded streams and projection matrix to receiving devices for aggregation and display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If specialized equipment (oversized monitors, dedicated rooms, high bandwidth communication equipment) is used to provide panoramic views, then the quality and capability of panoramic video conferencing is improved, but the cost and complexity of the system increases significantly
Solution Approach 1:
The system divides the panoramic view into multiple adjacent camera views captured by separate cameras. Each camera captures a specific segment of the scene, and these segments are later stitched together to form the complete panoramic view. This segmentation allows the use of standard cameras instead of a single complex panoramic camera or oversized monitors.
Solution Approach 2:
The system merges multiple adjacent camera views into a single panoramic image through image stitching. The projection matrix combines the segmented views from multiple cameras to create a unified panoramic representation, achieving the panoramic effect without requiring specialized panoramic hardware.
2Reliability
If specialized equipment is used to provide panoramic views, then the video conferencing capability is improved, but the cost of equipment and deployment increases
Solution Approach 1:
The system creates a virtual copy of the panoramic view by stitching together images from multiple standard cameras. Instead of using expensive specialized equipment to capture the full panoramic view directly, the system synthesizes a panoramic representation from multiple standard camera images, reducing hardware costs while maintaining the panoramic experience.
Solution Approach 2:
The system makes standard cameras universal by enabling them to perform panoramic capture through software processing. The projection matrix and image stitching algorithms allow ordinary cameras to function as part of a panoramic video conferencing system, eliminating the need for specialized panoramic cameras or monitors.
3Ease of manufacture
If multiple adjacent camera views are captured and stitched together to create panoramic images, then the use of common cameras is enabled, but the computational complexity and processing requirements increase
Solution Approach 1:
The system performs preliminary actions by pre-calculating and transmitting the projection matrix that describes the spatial relationship between cameras. This projection matrix is prepared in advance and sent to receiving devices, so that the actual image stitching and panoramic view generation can be performed efficiently at the receiving end without complex real-time computation at the sending end.
Data Source
AI summary
In one embodiment, video is transmitted between a sending device and a receiving device. The sending device is configured to receive adjacent camera views and encode the adjacent camera views independently into video streams. The sending device performs an image analysis on the adjacent camera views in order to generate a projection matrix to relate the adjacent camera views. The projection matrix and the encoded video streams are sent to at least one receiver. The receiver is configured to receive the encoded video streams and the projection matrix relating the encoded video streams. The receiver calculates an aggregate video stream using the projection matrix. The aggregate video stream includes portions of at least two of the encoded video streams. Other receivers may receive the same encoded video streams and generate a different aggregate video stream having a varying size, resolution, or number of views.