Handheld Image Orientation Correction via Gravity Sensor
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Solution Overview
Problem
Handheld electronic communication devices often display images with unnatural tilts due to rotation during video conferencing, as they lack effective mechanisms to correct for orientation changes relative to gravity.
Innovation Solution
Incorporating an orientation sensor and processor in handheld devices to calculate and correct for rotation angles, ensuring images are properly oriented by comparing the device's known orientation with gravity-based orientation signals, and transmitting this information to receiving devices for real-time image correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If handheld devices transmit video images during video conferencing, then communication functionality is improved, but image orientation accuracy deteriorates due to device rotation and tilt
Solution Approach 1:
The system performs preliminary determination of the correct image orientation based on the device's known mounting orientation before transmission. The processor determines the angle of rotation needed to correct the image tilt, and this correction information is transmitted along with the video data, enabling the receiving device to display properly oriented images without real-time orientation sensing at the receiving end.
Solution Approach 2:
The patent introduces rotation angle information as an intermediary element that mediates between the transmitting device's image capture and the receiving device's image display. This intermediate data (rotation angle or orientation correction parameters) allows the receiving device to compensate for orientation issues without needing identical sensor configurations or real-time orientation synchronization.
2Ease of operation
If devices use automatic orientation detection based on gravity sensors, then ease of operation is improved, but image orientation accuracy deteriorates when the device itself is tilted or rotated
Solution Approach 1:
The system uses feedback from the known device orientation (determined during manufacturing or through initial calibration) to continuously correct the displayed image orientation. The processor compares the current device orientation with the known correct orientation and applies real-time rotation corrections to maintain accurate image orientation regardless of device tilt or rotation during video conferencing.
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
This solution effectively corrects image tilts in real-time, ensuring that video conferencing images are displayed level and correctly oriented, enhancing user experience and video quality by minimizing distortions caused by device movement.
Implementation Method 1
an orientation sensor, which provides a signal representative of orientation relative to gravity
Data Source
Figure 1A~1B
Figure 2
Figure 3~5
AI summary
Tilt imparted to video images captured by a handheld electronic communication device is identified and corrected by the disclosed method and apparatus for image orientation. The handheld device includes image capturing capability and an orientation sensor, which provides a signal representative of orientation relative to gravity to calculate an angle of rotation for the captured images suitable to compensate a difference between the orientation of the handheld device and the orientation relative to gravity. The handheld device also includes a receiver wherein the angle of rotation is recovered and used to determine the changes needed substantially eliminate the difference between the orientation of the captured images and the orientation relative to gravity.