Multi-Camera Distance Control Using Autofocus Motor Position
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Solution Overview
Problem
Conventional stereo camera phones struggle with ensuring the working distance between the device and the captured object falls within a specific range (60 cm to 2 meters) for accurate stereo processing, leading to incorrect processing results when this range is not met.
Innovation Solution
A method and apparatus for multi-camera capturing control in electronic devices that obtain preview images, generate distance-related indices, and use these indices to selectively allow multi-camera capturing or output warning information, ensuring the working distance is within the optimal range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional stereo processing is performed without distance verification, then the device can capture images at any distance, but the processing results become incorrect when the working distance falls outside the specific range
Solution Approach 1:
The system performs preliminary distance detection using the autofocus motor's position information before initiating stereo processing. This preliminary action verifies whether the working distance falls within the required range (60cm-2m), preventing incorrect processing by stopping the capture process early when conditions are not met, thus ensuring reliability while maintaining adaptability through user notification and retry opportunity
2Manufacturing precision
If a fixed working distance range requirement is enforced, then processing accuracy is improved, but the device complexity increases due to additional control mechanisms
Solution Approach 1:
The system utilizes the existing autofocus motor's position information as a distance indicator without requiring separate distance sensing hardware. The autofocus motor's focal length adjustment position inherently reflects the distance to the captured object, allowing the system to self-determine whether the working distance is appropriate using already-available internal data, thereby improving processing accuracy without increasing device complexity
Solution Approach 2:
The system changes the parameter used for distance measurement from requiring dedicated distance sensors to utilizing the autofocus motor's focal length position parameter. This parameter substitution leverages existing operational data from the autofocus mechanism, maintaining processing accuracy requirements while avoiding additional hardware complexity
Data Source
AI summary
A method for performing multi-camera capturing control of an electronic device and an associated apparatus are provided, where the method can be applied to the electronic device. The method may include the steps of: obtaining a plurality of preview images, wherein the plurality of preview images are generated by using at least one lens module of the electronic device; generating at least one distance-related index according to characteristics of the plurality of preview images; and according to the aforementioned at least one distance-related index, selectively controlling whether to allow multi-camera capturing or controlling whether to output warning information. For example, when it is detected that a specific distance-related index within the aforementioned at least one distance-related index falls within a predetermined range, a notification which indicates that a multi-camera capturing function of the electronic device is allowed to be triggered may be output, in order to guarantee the overall performance.