Image Stabilization Apparatus for Follow Shot Blur Correction
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Solution Overview
Problem
Conventional image stabilization techniques for follow shots, such as those described in Japanese Patent Laid-Open No. 2006-317848, face challenges in stabilizing objects with long focal length lenses and fail to accurately match object velocity with camera panning velocity, leading to object blur and missed photo opportunities.
Innovation Solution
An image stabilization apparatus that includes a display unit, processors, and memory to extract the main object area, calculate object motion based on detected blur and motion vectors, and correct for both manual and object blur by adjusting the display area and optical system before capturing an image, providing real-time correction amounts to the user.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual blur correction function is stopped before main image capturing to accurately detect object moving amount, then measurement precision is improved, but object blur occurs because the manual blur correction is not applied during capture
Solution Approach 1:
The patent segments the blur correction process into two distinct phases: a detection phase where manual blur correction is stopped to accurately measure object motion, and a capture phase where manual blur correction is applied to stabilize the object. This segmentation allows each phase to optimize for its specific requirement without interference from the other.
Solution Approach 2:
The patent performs preliminary detection of object motion characteristics before the main image capture by temporarily disabling manual blur correction. This preliminary action provides accurate motion data that is then used to configure the blur correction parameters for the actual capture, ensuring optimal stabilization.
2Ease of operation
If object velocity is not matched with camera panning velocity, then follow shot assist is simpler to implement, but object blur occurs causing missed photo opportunities
Solution Approach 1:
The patent implements a feedback mechanism where object motion is detected during a preliminary phase, and this detected motion information is fed back to adjust the blur correction parameters for the main capture. This feedback loop ensures that the camera panning velocity is properly matched to object velocity, maintaining reliable object tracking.
Solution Approach 2:
The patent performs preliminary detection and calculation of object motion characteristics before the actual image capture. This preliminary action allows the system to pre-compute the appropriate blur correction parameters based on detected object velocity, ensuring accurate tracking during the main capture without requiring complex real-time adjustments.
3Reliability
If blur correction is applied continuously to stabilize object, then object stabilization is improved, but detection accuracy of object moving amount deteriorates due to interference
Solution Approach 1:
The patent divides the operation into distinct segments: a detection segment where blur correction is disabled for accurate motion measurement, and a capture segment where blur correction is enabled for stable object rendering. This temporal segmentation eliminates the interference between blur correction and motion detection.
Solution Approach 2:
The patent performs motion detection as a preliminary action before the main capture, during which blur correction is temporarily suspended. The motion data obtained from this preliminary phase is then used to configure the blur correction for the actual capture, ensuring that detection accuracy is not compromised by continuous blur correction application.
Data Source
AI summary
An image stabilization apparatus used in an image capturing apparatus that includes a display unit and which causes the display unit to display a still image captured by the image capturing apparatus by following a moving main object comprises a control unit configured to control the display unit so as to extract an area for the main object from an image captured by the image capturing apparatus and to display the extracted area and a calculating unit configured to calculate a motion of the main object based on a blur detected by a first detector which detects the blur of the image capturing apparatus and a motion vector detected by a second detector which detects the motion vector from the image, wherein the control unit changes the area for the main object based on the motion of the main object before the still image is captured.