Screen Watermark Pairing for Low-Cost Device Connection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electronic device connection methods involve complex interaction paths and high costs due to the use of UWB chips, and digital watermarking is hindered by moire interference during image capture.
Innovation Solution
A method where a first electronic device scans and decodes digital watermark information superimposed on images of a second device to establish a connection, using key areas and frames to enhance identification and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If UWB technology is used for device connection, then interaction path is reduced, but device cost increases due to UWB chip deployment
Solution Approach 1:
The patent replaces expensive UWB chips with a cost-effective digital watermarking solution using existing camera and display components. The connection is established through temporary visual code transmission rather than permanent dedicated hardware, reducing device manufacturing costs while maintaining efficient connection capability
Solution Approach 2:
The patent substitutes the mechanical/electronic UWB chip-based connection system with an optical information transmission system using digital watermarks. The connection process transitions from electromagnetic wave-based UWB communication to visual code capture and decoding, eliminating the need for specialized chips
2Ease of manufacture
If digital watermark technology is used for device connection, then device cost is reduced, but identification accuracy deteriorates due to moire interference
Solution Approach 1:
The patent introduces a specialized decoding algorithm as an intermediary between the captured image and the watermark extraction process. This algorithm specifically addresses and compensates for moire interference patterns, enabling accurate watermark identification despite the interference that occurs during camera capture of displayed watermarks
Solution Approach 2:
The patent employs parameter optimization in the watermark encoding and decoding process, adjusting watermark frequency, amplitude, and spatial distribution parameters to minimize moire effects. The decoding process dynamically adapts parameters based on captured image quality to maintain identification accuracy
3Measurement precision
If entire image processing is performed for watermark decoding, then identification accuracy is maintained, but power consumption increases
Solution Approach 1:
The patent divides the image processing task into segments by identifying and processing only key areas containing the digital watermark rather than the entire image. The system locates the watermark region through preliminary detection and concentrates computational resources on that specific area, maintaining identification accuracy while significantly reducing overall processing power consumption
Solution Approach 2:
The patent applies partial action by performing complete watermark decoding only on identified key areas rather than exhaustive processing of the entire image. This selective approach processes sufficient data to achieve accurate device identification without the excessive energy consumption of full-image analysis
Data Source
AI summary
Embodiments of this application provide a device connection method, an electronic device, and a system. The method may include: When detecting a first operation, a first electronic device may obtain, through a camera, a plurality of frames of images displayed by a second electronic device, determine digital watermark information hidden in the plurality of frames of images, to determine device identification information of the second electronic device based on the digital watermark information, and further establish a connection relationship with the second electronic device. In this technical solution, during device connection, an interaction path of the device connection can be shortened, and a device connection procedure is simplified, so that the device connection is more convenient.