Touchscreen Content Selection via Shape Drawing and Magnification
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Solution Overview
Problem
Conventional touchscreen interfaces, especially on small devices, are cumbersome and error-prone for content selection due to the need for precise pointing or using a stylus, especially when dealing with complex content like text and graphics.
Innovation Solution
A method and system that allow users to select content by drawing a shape on the touchscreen, magnifying the content, identifying deletable portions, and refining the selection by removing unwanted content, thereby simplifying the selection process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional content selection methods are used on small touchscreens, then precise selection can be achieved, but user effort and time consumption increase significantly
Solution Approach 1:
The selection process is segmented into two distinct phases: (1) rough selection phase where users draw shapes to select candidate content, and (2) refinement phase where users remove unwanted content from the magnified view. This segmentation allows users to quickly capture content without precise control, then refine the selection with enhanced visibility.
Solution Approach 2:
The system performs preliminary magnification of the selected content area before the user finalizes their selection. By pre-magnifying the content based on the drawn shape, the system prepares the refinement view in advance, allowing users to see what they've selected and make adjustments without returning to the small-scale view.
2Measurement precision
If conventional content selection methods are used on small touchscreens, then precise selection can be achieved, but operation complexity increases
Solution Approach 1:
Instead of requiring users to precisely define the final selection area from the start, the system inverts the approach: users first define a rough selection area with simple shapes, then the system presents a magnified view where users remove unwanted content. This inversion transforms a precision task into a rough estimation task followed by an easy refinement task.
Solution Approach 2:
The magnified preview view serves as an intermediary between the rough selection and final selection. It allows users to see what content will be selected without committing to the final selection yet, providing a buffer zone for adjustment and reducing operational complexity.
3Length of moving object
If touchscreen size is reduced for portability, then device portability improves, but content selection accuracy deteriorates
Solution Approach 1:
The system transitions from the two-dimensional touchscreen surface to a third-dimensional magnified preview space. By displaying the selected content at a larger scale in a dedicated preview area, the system effectively adds a dimensional transformation that compensates for the limited screen real estate, allowing accurate selection on small devices.
4Measurement precision
If users select content precisely on small touchscreens, then selection accuracy improves, but user effort increases
Solution Approach 1:
The system performs automatic magnification and content identification based on the user's drawn shape. Instead of requiring users to manually adjust views or precisely trace content boundaries, the system automatically enlarges the selected area and presents it for review, allowing users to benefit from the system's automated enhancement rather than expending effort on manual precision work.
Data Source
AI summary
Methods and systems for content selection using touchscreens are disclosed. A method for selecting content using a touchscreen includes determining first content displayed at least partially within an area of a touchscreen where the area is defined by a shape drawn on the touchscreen by a user, magnifying the first content on the touchscreen, receiving user input identifying one or more deletable content portions displayed within the first content, and selecting a desired content where the desired content is obtained by removing the deletable content from the first content. Corresponding systems and computer readable media are also disclosed.