Virtual Whiteboard for Real-Time Video Enhancement
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Solution Overview
Problem
Existing electronic conferencing methods struggle to optimally share physical whiteboards, as participants often face difficulties in viewing distant, angled, or poorly lit boards due to ad-hoc webcam adjustments, leading to obstructed views and inconvenience.
Innovation Solution
A method that captures live video from a webcam, transforms it into enhanced output video providing a clear, real-time view of the physical whiteboard, and transmits this enhanced view to other participants, allowing them to see the board content while also viewing the presenter, even when the presenter blocks the view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a participant uses a webcam to capture a physical whiteboard from a distance or at an angle, then the board content can be shared with remote participants, but the captured image quality deteriorates making the board difficult to see and read
Solution Approach 1:
The system creates a digital copy of the physical whiteboard by capturing images with a camera and processing them to generate a virtual whiteboard representation. This virtual copy is then shared with remote participants, allowing them to view the board content in high quality without being physically present, thus resolving the contradiction between sharing board content and maintaining image quality.
Solution Approach 2:
The system introduces a virtual whiteboard as an intermediary between the physical whiteboard and remote participants. The virtual whiteboard acts as a mediator that transforms the physical board's visual information into a shareable digital format, enabling remote participants to view the content clearly without being constrained by physical distance or angle limitations.
2Loss of information
If a participant moves the webcam to get a better view of the whiteboard, then the board content becomes more visible, but the operation becomes inconvenient and may not always be feasible
Solution Approach 1:
Instead of requiring physical adjustment of the webcam to improve board visibility, the system creates a virtual copy of the whiteboard that can be optimized for viewing without moving the physical camera. The virtual whiteboard can be digitally adjusted, zoomed, and enhanced while the physical webcam remains in its original position, thus resolving the contradiction between improving visibility and maintaining ease of operation.
3Ease of operation
If a participant blocks the whiteboard while drawing or erasing, then the presenter can work on the board, but remote participants lose sight of the board content until the presenter moves out of the way
Solution Approach 1:
The system maintains a persistent virtual copy of the whiteboard that continues to display board content even when the physical board is blocked by the presenter. The virtual whiteboard is updated based on camera input when visible and maintains its state when blocked, ensuring continuous visibility for remote participants while allowing the presenter to interact with the physical board without interruption.
Solution Approach 2:
The system performs preliminary capture and processing of the whiteboard content to create a virtual representation that can be displayed independently of the physical board's current visibility. This preliminary action of creating the virtual copy ensures that board content remains accessible to remote participants even before the presenter moves out of the way, resolving the contradiction between board interaction and continuous visibility.
4Loss of information
If the whiteboard is in a dark area of the webcam's field of view, then the board can be included in the captured scene, but the board content becomes difficult for remote participants to see
Solution Approach 1:
The system creates a virtual copy of the whiteboard that can be digitally enhanced for illumination. When the physical board is in a dark area, the camera captures the scene and the virtual whiteboard processing enhances the visibility of the board content through digital image processing techniques, allowing remote participants to see the content clearly despite poor physical lighting conditions.
Data Source
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AI summary
A technique for sharing a physical target board over an electronic conference includes transforming live video from a webcam into output video that provides an enhanced view of the physical target board. The output video is shared with one or more computing machines of conference participants to enable such participants to see the enhanced view of the physical target board in real time. The conference participants can thus enjoy enhanced images of the physical board and its content, which would otherwise be difficult or impossible to see.