Mobile Image Rotation via Gravity and Face Detection
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Solution Overview
Problem
Mobile devices struggle to display images in a user-friendly orientation when operated in non-upright positions, as existing technologies do not effectively adjust the image rotation based on both the device's and user's orientations relative to gravity.
Innovation Solution
Incorporating a gravity sensor and face recognizer into a mobile device to detect included angles and rotational directions, generating rotating signals to determine the optimal image rotation direction, allowing the device to adjust the image display accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the image is displayed corresponding to the gravity direction, then the display works correctly in upright position, but the user experience deteriorates when the device is operated in non-upright position
Solution Approach 1:
The patent applies dynamics by making the image rotation adaptive and changeable based on real-time detection of device orientation and user face direction. The system dynamically adjusts the image rotation angle according to the detected angles between the device reference direction, user face reference direction, and gravity direction, allowing the display to automatically adapt to different operating scenarios whether upright or non-upright.
Solution Approach 2:
The patent implements feedback mechanisms using gravity sensors to detect device orientation and face recognizers to detect user face direction. These sensors continuously provide feedback about the actual orientation states, which are then processed to determine the appropriate image rotation angle, creating a closed-loop system that automatically adjusts the display based on real-time conditions.
2Measurement precision
If multiple sensors and recognizers are added to detect device and user orientation, then the image rotation accuracy improves, but the device complexity increases
Solution Approach 1:
The patent applies universality by designing a integrated processing system that handles multiple detection functions (gravity sensing, face recognition) through a unified algorithmic framework. The same processor uses both gravity sensor data and face recognizer data through a consistent mathematical model to determine image rotation, allowing the system to perform multiple orientation detection tasks with a single multi-functional processing architecture.
Solution Approach 2:
The patent merges the functionality of gravity sensor detection and face recognizer detection into a unified image rotation control system. Both detection mechanisms are combined and processed together through the same computational logic that calculates angles relative to gravity direction and determines the final rotation angle, consolidating multiple functions into an integrated solution.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables the mobile device to rotate images to a suitable angle or direction for the user, enhancing user convenience and comfort regardless of the device's or user's orientation.
Implementation Method 1
detecting a first included angle between a reference direction of the mobile device and a gravity direction, and detecting a first rotational direction that the reference direction of the mobile device has been rotated relative to the gravity direction through a gravity sensor
Data Source
AI summary
A rotating method of an image on a mobile device includes detecting a first included angle between a reference direction of the mobile device and a gravity direction, and a first rotational direction that the reference direction of the mobile device has been rotated relative to the gravity direction; selectively generating a first rotating signal according to the first included angle; detecting a second included angle between a reference direction of a user's face and the gravity direction, and a second rotational direction that the reference direction of the user's face has been rotated relative to the gravity direction; selectively generating a second rotating signal according to the second included angle; and rotating the image on the mobile device in a rotational direction opposite to the first rotational direction and/or identical to the second rotational direction.