Video Writing Extraction for Automatic Lecture Note Capture
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Solution Overview
Problem
Existing e-learning technologies require learners to manually take notes of instructor's writing in videos, leading to inconvenience and potential missed content.
Innovation Solution
An electronic device and method that automatically identifies and records writing information in videos, modifying images based on detected changes such as corrections, additions, or area adjustments, and displays them in a separate area of the screen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If learners manually take notes of writing information in video lectures, then they can record the content, but they must pause the video which causes them to miss lecture content
Solution Approach 1:
The system automatically captures and copies writing information from the video frame by frame, converting it into a separate note document. This eliminates the need for manual note-taking and video pausing, as the writing information is automatically extracted and recorded while the video continues to play.
Solution Approach 2:
The patent replaces the manual mechanical process of pausing video and writing notes with an automated computer vision system that detects writing areas in video frames, extracts the writing information, and records it automatically. This substitution eliminates the need for user intervention in the note-taking process.
2Measurement precision
If the system displays the entire video screen, then all content is visible, but writing information cannot be clearly distinguished from other video elements
Solution Approach 1:
The system extracts the writing information from the entire video frame by identifying specific writing areas using computer vision algorithms. The extracted writing information is then displayed in a separate dedicated area, separating it from the main video content and other visual elements, thereby improving detection precision and readability.
Solution Approach 2:
The patent segments the video frame into different regions, identifying the writing area distinct from other video elements. The writing information is extracted from this segmented region and displayed separately, allowing for clear distinction and focused analysis of the writing content without interference from other video elements.
3Loss of information
If the system processes and displays all writing information in real-time, then complete information is provided, but system resources are heavily consumed
Solution Approach 1:
The system performs partial processing by focusing only on identifying and extracting writing information from specific regions of the video frame, rather than processing the entire frame in detail. This selective approach maintains information completeness while reducing the computational load and resource consumption.
Solution Approach 2:
The system performs preliminary identification of writing areas in each video frame before full processing. By pre-identifying regions containing writing information, the system can then focus computational resources only on those specific areas, reducing overall processing requirements while ensuring no writing information is missed.
Data Source
AI summary
A control method for an electronic device includes displaying a video in a first area of a display; identifying a writing area, including at least one piece of writing information, from the video displayed in the first area; acquiring a first image corresponding to the identified writing area, so as to display the first image in a second area of the display; based on a change being detected in the at least one writing information, identifying a type of the change; and acquiring a second image formed by correcting a first image based on the type of the identified change, so as to display the second image in the second area.