Image Pickup Apparatus Motion Detection for Shake Reduction
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Solution Overview
Problem
Conventional imaging apparatuses face challenges in accurately determining the moving speed of photographing objects, leading to inappropriate adjustments in photographing sensitivity, resulting in image quality degradation due to camera shake and object shake, especially when photographing children or unpredictable subjects.
Innovation Solution
An imaging apparatus with a specific photographing object detection section that identifies moving subjects, such as children, and adjusts the photographing sensitivity and exposure time accordingly, using a combination of image processing and motion detection to prevent excessive noise and blur.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If photographing sensitivity is increased to prevent object shake, then shutter speed increases and object shake is reduced, but noise in the image increases
Solution Approach 1:
The system performs preliminary motion detection during the exposure period to predict object movement. By detecting motion in advance and adjusting sensitivity accordingly, the system can prevent object shake without unnecessarily increasing sensitivity, thereby avoiding excessive noise while maintaining sharp images of moving objects.
2Reliability
If photographing sensitivity is increased to correct camera shake, then image quality improves, but noise increases
Solution Approach 1:
The system dynamically adjusts photographing sensitivity based on real-time motion detection results. When camera shake is detected, sensitivity is increased to correct the blur. When motion is minimal or stationary objects are detected, sensitivity remains low to avoid noise. This dynamic adjustment resolves the contradiction by making sensitivity a variable parameter rather than a fixed setting.
3Reliability
If photographers manually adjust photographing sensitivity based on object motion, then image quality can be optimized, but operation complexity increases and timing is difficult
Solution Approach 1:
The system performs self-service by automatically detecting object motion and adjusting photographing sensitivity without photographer intervention. The motion detection system continuously monitors the scene and the control unit automatically modifies exposure parameters, eliminating the need for manual adjustment while optimizing image quality for moving objects.
4Illumination intensity
If exposure time is extended to improve image brightness, then light collection increases, but camera shake and object shake increase
Solution Approach 1:
The system performs preliminary motion detection during the exposure period to identify objects that will move. By detecting motion in advance, the system can shorten exposure time for moving objects to prevent shake while maintaining adequate brightness through other means such as higher sensitivity or flash illumination, thereby resolving the contradiction between brightness and shake prevention.
Data Source
AI summary
An imaging apparatus capable of preventing photographing sensitivity from being increased more than necessary, reducing image quality degradation caused by camera shake or object shake and easily photographing images in good image quality. The imaging apparatus includes an imaging optical system that forms an optical image of a photographing object. An imaging sensor receives the optical image and converts the optical image to an electrical image signal. A detector determines, based on the image signal, whether the photographing object is a specific photographing object likely to move while a photograph is being captured that corresponds to information stored in a memory device provided to the imagining apparatus. A control section establishes an operational mode causing the imaging apparatus to continuously take a plurality of photographs of the photographing object when the photographing object is determined to be the specific photographing object that is likely to move.