Camera Autofocus Feature Template Luminance Adjustment
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Solution Overview
Problem
Existing picture taking devices with automatic focus functions often suspend focus when exposure changes, such as when the flashlight is turned on or off, leading to inconsistent image quality.
Innovation Solution
A method that adjusts the feature template of a target object based on luminance information from both imaging modes to maintain constant automatic focusing, ensuring the focus remains on the target object even with changes in exposure conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If automatic focus function is implemented in picture taking devices, then focusing accuracy on target objects is improved, but the system suspends focus when exposure changes (e.g., flashlight on/off), leading to inconsistent image quality
Solution Approach 1:
The patent implements dynamic feature template adjustment by detecting exposure changes (flashlight on/off) and adapting the feature template parameters in real-time. This allows the automatic focus system to remain active and accurate across varying exposure conditions, transforming a static template approach into a dynamic one that responds to environmental changes.
Solution Approach 2:
The patent changes the parameters of the feature template based on luminance information from different imaging modes. By adjusting template parameters according to exposure conditions, the system maintains focusing accuracy despite changes in lighting environment, resolving the suspension issue caused by fixed parameter templates.
2Reliability
If the system adapts to different exposure conditions by adjusting feature templates, then focus consistency is improved, but processing complexity increases
Solution Approach 1:
The patent employs feedback mechanisms by detecting luminance information from images and using this information to adjust feature template parameters. This closed-loop approach automatically adapts the focusing system to exposure changes without requiring complex manual intervention, balancing reliability improvement with manageable processing complexity.
Solution Approach 2:
The system performs self-adjustment by automatically detecting exposure conditions and modifying its own feature templates without external intervention. This self-service capability maintains focus consistency while minimizing the need for additional complex control systems.
3Adaptability or versatility
If feature template luminance adjustment is performed based on statistics information of light intensity, then adaptability to various picture taking modes is improved, but calculation time increases
Solution Approach 1:
The patent performs preliminary calculations by pre-processing luminance information and statistics data to prepare feature templates for different imaging modes in advance. This preliminary action reduces real-time calculation requirements, improving mode adaptability while minimizing calculation time delays during actual operation.
Data Source
AI summary
A method and an apparatus for focusing are provided. The method includes: determining that imaging mode switches from a third imaging mode to a fourth imaging mode, wherein the third imaging mode comprises a mode in which a non-depth camera is used to take a picture, and the fourth imaging mode comprises a mode in which a depth camera is used to take a picture; creating a third feature template, wherein the third feature template is used to record depth information of a target object; and searching for an image of the target object according to the third feature template in the fourth imaging mode.