Image Processing Device Orientation Detection
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Solution Overview
Problem
The Exif file format's GPSInfoIFD area, which stores GPS measurement information, has inaccuracies in photographing direction due to geomagnetic sensor variability, and screen shot images often lack necessary information for proper reproduction.
Innovation Solution
An image processing device that identifies the orientation and direction of the image processing device using acceleration and geomagnetic sensors, generating accurate Exif files by associating orientation and direction information with image data, even for screen shots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If GPS measurement information is stored in the Exif file format, then location information is preserved, but photographing direction accuracy deteriorates due to geomagnetic sensor variability
Solution Approach 1:
The patent changes the reference parameter for direction measurement from geomagnetic north (which varies) to device orientation relative to the captured image (which is stable). By using acceleration sensor data to determine device orientation and calculating direction as the angle between the optical axis and the upward direction, the system maintains consistent direction values even when geomagnetic conditions vary.
2Adaptability or versatility
If screen shot photographing function is implemented, then image capture capability is expanded, but proper reproduction is compromised due to lack of photographing condition information
Solution Approach 1:
The patent makes the Exif file generation mechanism universal by applying the same orientation detection and metadata generation process to both traditional photographing and screen shot photographing. The image processing device uses the same acceleration sensor-based orientation detection for screen shots as it does for regular photos, ensuring that all images receive appropriate orientation and direction information for proper reproduction.
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
Ensures accurate generation and reproduction of image files by stabilizing photographing direction information and including necessary metadata, even for screen shots.
Implementation Method 1
identifies the orientation and direction of the image processing device using acceleration and geomagnetic sensors
Implementation Method 2
identifies the orientation and direction of the image processing device using acceleration and geomagnetic sensors
Data Source
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AI summary
When an accepting section 102 accepts an order to acquire image data, an image data acquirer 104 acquires image data from a memory section 130 and compresses it in the JPEG format. An orientation identifier 122 identifies orientation information of an image processing device 10 by using a detection value of an acceleration sensor. A direction identifier 124 identifies the azimuthal angle of a lens optical axis by using a detection value of a geomagnetic sensor and orientation information identified by the orientation identifier 122. If it is determined by the orientation identifier 122 that the image processing device 10 is in a horizontal orientation, the direction identifier 124 identifies the azimuthal angle of the lens optical axis from a predetermined direction in the image processing device 10 and the detection value of the geomagnetic sensor without using the lens optical axis direction.