Resolution-Matched Application Image Rendering for Screen Projection
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Solution Overview
Problem
Existing screen projection technologies result in large black edges and reduced display quality due to unequal scaling of application images between devices with different screen resolutions, limiting user experience and functionality.
Innovation Solution
The method involves establishing a virtual display on the terminal with a resolution matching the target device, allowing the application image to be drawn and transmitted for display on the redirection device, independent of the terminal's physical screen, thus adapting the image resolution to the target device's screen resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If equal proportion scaling is used to ensure image consistency between devices, then image consistency is maintained, but large black edges appear and display quality is reduced
Solution Approach 1:
The patent changes the scaling parameter from equal proportion to non-uniform scaling with different scale factors for width and height. The terminal calculates first and second scale factors based on the ratio of target screen resolution to original screen resolution, allowing the image to adapt to the target device's aspect ratio while maintaining key visual elements, thereby eliminating black edges and improving display quality
Solution Approach 2:
The patent introduces dynamic adjustment of scaling parameters based on the specific resolution differences between devices. The scale factors are dynamically calculated according to the target device's screen characteristics, enabling adaptive image transformation that optimizes display quality for each specific device configuration
2Loss of information
If equal proportion scaling is used to maintain image consistency, then image fidelity is preserved, but display area is reduced due to black edges
Solution Approach 1:
The patent modifies the scaling parameters to use non-uniform scaling with differentiated width and height scale factors. This allows the image to expand more efficiently to fill the target screen area while preserving important visual information through selective scaling, thereby increasing display area without sacrificing critical image fidelity
3Manufacturing precision
If non-uniform scaling is used to eliminate black edges, then display quality improves, but image distortion occurs
Solution Approach 1:
The patent applies different scaling factors to different dimensions (width and height) of the image based on the target device's aspect ratio. This local differentiation in scaling approach allows the image to adapt to the screen geometry while preserving the relative proportions of key visual elements, thereby improving display quality without significant distortion
Solution Approach 2:
The patent performs preliminary calculation of appropriate scale factors before actual image rendering. By pre-computing the optimal scaling parameters based on resolution ratios and aspect ratios, the system prepares the image transformation in advance, ensuring that the scaling operation achieves both quality improvement and minimal distortion
Data Source
AI summary
A method for displaying an application image, a terminal, and a non-transitory computer-readable storage medium are provided. The method is performed by the terminal and includes: acquiring application starting information of a redirection application running in the terminal; establishing a virtual display for the redirection application based on a target screen resolution of the redirection device configured to display the redirection application, the virtual display having the target screen resolution, and the virtual display being independent of a physical screen of the terminal; acquiring a redirection application image drawn for the virtual display, the redirection application image being an application image of the redirection application, and a resolution of the redirection application image matching the target screen resolution; and transmitting image data of the redirection application image to the redirection device to enable the redirection device to display the redirection application image based on the image data.