Hand Shake Correction Control Unit Power Optimization
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Solution Overview
Problem
Conventional digital photographing apparatuses consume excessive power due to continuous operation of motion sensors to determine whether hand shake correction is necessary before photographing.
Innovation Solution
A method and apparatus that compare pixel values of previous and current preview image data to control the hand shake correcting unit, turning it off if the pixel value error is less than a reference value and turning it on if not, thereby reducing unnecessary power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the motion sensor operates continuously to determine whether hand shake correction is necessary, then the reliability of hand shake detection is improved, but the power consumption increases significantly
Solution Approach 1:
The motion sensor operates periodically rather than continuously. The control unit activates the motion sensor only when needed (e.g., when pixel value changes are detected or before shutter release), and deactivates it during preview mode or when stability is confirmed, thereby reducing power consumption while maintaining detection reliability.
Solution Approach 2:
The system uses feedback from pixel value comparisons to control motion sensor operation. The control unit continuously monitors preview image data, compares pixel values between frames, and uses this feedback to determine when to activate or deactivate the motion sensor, creating an adaptive control loop that optimizes power consumption.
2Reliability
If the hand shake correcting unit operates continuously to ensure stable images, then the image quality is improved, but the power consumption increases
Solution Approach 1:
The hand shake correcting unit operates dynamically rather than statically. The control unit adjusts the operation state of the hand shake correcting unit based on real-time conditions (pixel value changes, motion sensor data), activating it only when hand shake is detected and deactivating it when the scene is stable, thereby reducing unnecessary power consumption.
Solution Approach 2:
The system changes the operational parameters of the hand shake correcting unit based on detected conditions. When pixel value differences exceed a threshold or motion is detected, the correcting unit is activated with appropriate correction strength. When stability is confirmed, the correcting unit is deactivated or operated at reduced intensity, optimizing power consumption.
3Speed
If pixel value comparison is performed continuously to detect hand shake, then the responsiveness to hand shake detection is improved, but the processing load and power consumption increase
Solution Approach 1:
The system performs pixel value comparison selectively rather than on every single pixel continuously. The control unit compares pixel values at strategic points (e.g., between preview frames, before shutter release) and uses threshold-based filtering to determine significance, reducing processing load and power consumption while maintaining detection speed.
Solution Approach 2:
The preview image data generation process inherently provides the data needed for hand shake detection through its own operation. The control unit utilizes the existing preview image processing pipeline to generate comparison data, eliminating the need for separate dedicated detection processing and reducing overall power consumption.
Data Source
AI summary
Provided are a digital photographing apparatuses and methods of controlling the same. The method includes: inputting previous preview image data; inputting current preview image data; comparing and determining a pixel value of the previous preview image data and a pixel value of the current preview image data; and controlling the operation of a hand shake correcting unit according to the comparison and determination result. Accordingly, the hand shake correcting unit is selectively turned off by easily detecting a case where hand shake correction is not necessary, such as a case where a tripod is used, thereby reducing power consumption.