Handwriting Recognition for Mixed Diagram Elements
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Solution Overview
Problem
Conventional handwritten diagramming applications on computing devices are limited in handling the complexity of diagramming, forcing users to navigate menus and follow specific drawing orders, which is non-intuitive and hinders quick diagram creation, especially for mixed content diagrams with shapes and text.
Innovation Solution
A system and method that enables users to draw shapes and text naturally without pre-determined orders by accurately differentiating between shapes and text, allowing for freehand diagram creation, editing, and manipulation of digital ink while retaining the original style and relationships, using a handwriting recognition system that includes preprocessing, segmentation, recognition, and output stages to convert hand-drawn inputs into typeset or beautified digital documents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional handwritten diagramming applications use menu navigation and predefined drawing orders, then the system structure is simple, but the ease of operation deteriorates and productivity decreases
Solution Approach 1:
The system automatically performs handwriting recognition, shape identification, and text extraction without requiring user intervention. The application self-adjusts by analyzing stroke patterns and spatial relationships to differentiate between diagram elements and text, eliminating the need for manual mode switching or menu navigation.
Solution Approach 2:
The system changes parameters such as stroke continuity, curvature, pressure patterns, and spatial distribution to automatically differentiate between shapes and text. By monitoring these parameter variations in real-time, the system adapts its recognition mode without requiring predefined drawing orders or manual configuration.
2Productivity
If the system requires specific drawing orders and menu navigation, then device complexity is low, but productivity deteriorates
Solution Approach 1:
The system performs preliminary classification of input strokes during the drawing process itself, continuously analyzing stroke patterns and spatial relationships to predict and identify diagram elements as they are being created. This allows immediate recognition and conversion to digital format without requiring post-processing or adherence to predefined sequences.
Solution Approach 2:
The recognition system dynamically adapts its parameters and thresholds based on the current drawing context, stroke characteristics, and spatial relationships. The system continuously adjusts its classification criteria to accommodate different diagram types and user styles, enabling high-speed processing without sacrificing accuracy.
3Ease of operation
If the system allows freehand drawing without predefined orders, then ease of operation improves, but measurement precision and recognition accuracy deteriorate
Solution Approach 1:
The system adds temporal and spatial dimensions to the analysis by monitoring the sequence, speed, and spatial distribution of strokes over time. By analyzing the temporal pattern of stroke input and the spatial relationships between elements, the system can accurately differentiate between text and shapes even when drawn freely without predefined orders.
Solution Approach 2:
The system provides continuous feedback by analyzing stroke patterns in real-time and adjusting its recognition thresholds based on the observed drawing behavior. The feedback mechanism allows the system to learn from the user's drawing style and improve its differentiation accuracy between text and diagram elements while maintaining natural freehand drawing capability.
Data Source
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Figure 3A~3B
AI summary
A system for hand-drawing diagrams including text and non-text elements on a computing device is provided, the computing device comprising a processor and at least one non-transitory computer readable medium for detecting and recognizing hand-drawing diagram element input under control of the processor, the at least one non-transitory computer readable medium configured to cause display of a plurality of input diagram elements in interactive digital ink on a display device associated with the computing device, associate one or more of the diagram elements with one or more other of the diagram elements in accordance with a class and type of each diagram element, and cause re-display of the diagram elements based on one or more interactions with the digital ink received and in accordance with the one or more associations.