Whiteboard Manager Vectorization for Bandwidth Reduction
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Solution Overview
Problem
Conventional multimedia conference systems face challenges in allowing remote participants to effectively view and interact with whiteboard content due to constraints with video cameras, leading to difficulties in capturing and displaying whiteboard markings, and existing solutions like interactive whiteboards are expensive and complex to set up.
Innovation Solution
A whiteboard manager component that utilizes a Real-Time Whiteboard Capture System (RTWCS) to capture and process whiteboard images, extracting attribute information through vectorization techniques to render digital representations, reducing bandwidth consumption and enabling interactive editing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an interactive whiteboard is used to convert markings to digital information, then remote participants can view whiteboard content, but the system becomes expensive and complex to setup
Solution Approach 1:
The patent creates a digital copy of the whiteboard content by capturing images with a video camera and processing them through vectorization to extract stroke attributes. This digital copy is then transmitted to remote participants, replacing the need for expensive interactive whiteboard hardware while achieving the same goal of making whiteboard content viewable remotely
Solution Approach 2:
The patent replaces the mechanical/physical interactive whiteboard system with a software-based image processing system. Instead of using specialized hardware to detect pen strokes, the system uses a video camera to capture images and software algorithms to extract stroke information, substituting a complex mechanical system with a simpler optical and computational approach
2Device complexity
If video camera constraints are used for whiteboard capture, then system cost is reduced, but whiteboard markings cannot be effectively displayed to remote participants
Solution Approach 1:
The patent transforms the whiteboard content from raw image data to vectorized stroke attribute data (coordinates, colors, line widths). This parameter transformation allows the system to work with standard video camera constraints while producing high-quality digital representations that are effectively transmitted to remote participants
Solution Approach 2:
The patent introduces an image processing and vectorization system as an intermediary between the video camera and the remote display. This intermediary component processes the camera images to extract stroke attributes and reconstructs the whiteboard content digitally, bridging the gap between camera constraints and effective content transmission
3Measurement precision
If full-resolution whiteboard images are transmitted, then viewing quality is improved, but bandwidth consumption increases
Solution Approach 1:
The patent extracts only the essential stroke attribute information (coordinates, colors, line widths) from the full whiteboard image rather than transmitting the entire image. This extraction process removes redundant pixel data while preserving the critical information needed to reconstruct the whiteboard content, achieving both high viewing quality and low bandwidth consumption
Data Source
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AI summary
Techniques to manage a whiteboard for multimedia conference events are described. An apparatus may comprise a whiteboard manager component operative to manage whiteboard recording, image processing and reproduction operations for a multimedia conference event. The whiteboard manager component may comprise an image quantizer module operative to receive an image of a writing surface with pen strokes, and quantize each pixel of the image into a predetermined number of colors, an attribute extractor module communicatively coupled to the image quantizer module, the image quantizer module operative to extract stroke attribute information for the pen strokes from the quantized pixels, and a whiteboard interface module communicatively coupled to the attribute extractor module, the whiteboard interface module operative to send the stroke attribute information to a meeting console for rendering as digital pen strokes on a digital writing surface. Other embodiments are described and claimed.