Imaging Control Device for Telephoto Subject Tracking
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Solution Overview
Problem
Photographers face difficulties in maintaining image clarity and tracking moving subjects, especially with telephoto lenses, due to increased hand shake effects and limited control over image blur correction, making it challenging to frame and position subjects accurately within the image frame.
Innovation Solution
A control device integrated into imaging apparatuses that includes a blur detection unit, subject detection unit, and tracking control unit, allowing for enhanced image blur correction and automatic subject tracking by adjusting the blur correction characteristics based on the selected control state and subject position, enabling smoother subject tracking and improved framing assistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If image blur correction control is performed with high correction effect, then image clarity is improved, but photographer's ability to perform fine adjustment and frame subject is reduced
Solution Approach 1:
The patent applies dynamics by making the image blur correction characteristics changeable based on operation mode. In telephoto mode, the correction characteristics are adjusted to provide stronger correction effect for maintaining image clarity, while in other modes, the characteristics allow for more manual control. This dynamic adjustment resolves the contradiction by adapting the correction strength to the specific operational context.
Solution Approach 2:
The patent changes the parameters of the image blur correction control based on the detected operation mode. When telephoto mode is detected, the correction amount and/or correction speed parameters are adjusted to enhance correction effect. This parameter change allows the system to optimize image clarity when needed while preserving photographer control in other scenarios.
2Ease of operation
If manual tracking operation is used for moving subject, then photographer control is maintained, but tracking accuracy and speed are insufficient
Solution Approach 1:
The patent implements self-service by enabling automatic subject tracking that operates independently of continuous manual input. The system automatically detects the subject, calculates tracking amounts, and adjusts the optical system to maintain subject positioning. This allows the system to perform tracking functions autonomously while the photographer retains overall control through mode selection and can intervene when needed.
Solution Approach 2:
The patent uses feedback mechanisms where the subject detection unit continuously monitors subject position, and this information is fed back to the tracking control unit which adjusts the optical system accordingly. This closed-loop feedback enables accurate and responsive tracking of moving subjects while maintaining photographer control through the overall system architecture.
3Measurement precision
If telephoto lens is used for photographing, then subject detail is captured, but hand shake influence on image blur increases
Solution Approach 1:
The patent changes the image blur correction parameters specifically when telephoto mode is detected. The correction amount and correction characteristics are adjusted to compensate for the increased hand shake influence inherent in telephoto photography. This allows the system to maintain subject detail capture capability while actively counteracting the amplified hand shake effects through enhanced correction control.
Solution Approach 2:
The patent applies preliminary anti-action by proactively increasing the image blur correction effect before hand shake can significantly degrade the image. When telephoto mode is detected, the system pre-adjusts the correction characteristics to prevent rather than merely react to hand shake damage, thereby protecting the subject detail capture quality.
Data Source
AI summary
A control device includes: a correction control unit configured to acquire a blur detection signal detected by a blur detection unit to calculate a correction amount of an image blur and control an image blur correction unit configured to correct the image blur; a subject detection unit configured to detect a position of a subject in a photographed image and acquire position information of the subject in the photographed image; a tracking control unit configured to perform tracking control of the subject based on the position information of the subject acquired by the subject detection unit to; and a setting unit configured to set a control state of the tracking control unit. The setting unit sets the control state of the tracking control unit by selecting the set control state from a plurality of control states including a first state in which a tracking subject selectable mode is not set and a second state in which the mode is set and a tracking subject is not selected. The correction control unit acquires information on the control state selected by the setting unit and performs control to change characteristics of calculating the correction amount so that an image blur correction effect in the second state is higher than an image blur correction effect in the first state.