Subject Shake Detection in Image Processing Devices
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Solution Overview
Problem
Existing technologies for notifying subject shake in captured images face challenges in accurately detecting subject shake, especially when other subjects or background elements are detected as motion vectors, leading to potential degradation in image quality.
Innovation Solution
An image processing device that detects a subject, distance information, and subject shake, and generates a shake notification image by superimposing a notification plane based on detected subject shake and distance information, allowing for easy confirmation of subject shake by the photographer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If motion vector detection means is used to detect subject shake, then subject shake can be detected, but detection accuracy deteriorates when other subjects or background elements are detected as motion vectors
Solution Approach 1:
The patent segments the detection process by first identifying the specific subject of interest using subject identification means, then applying motion vector detection only to that segmented region. This prevents other subjects or background elements from being incorrectly detected as motion vectors, thereby resolving the contradiction between detection coverage and detection accuracy.
2Loss of information
If a shake notification image is generated for all detected motion, then subject shake notification is provided, but image quality deteriorates due to inclusion of non-subject regions
Solution Approach 1:
The patent applies local quality by generating shake notification information specifically for the identified subject region rather than for the entire image. The notification is localized to the subject boundaries, ensuring that only relevant subject shake is notified while maintaining overall image quality without spurious notifications from background or other subjects.
3Measurement precision
If distance information is used to generate shake notification image, then notification accuracy for specific subject is improved, but device complexity increases
Solution Approach 1:
The patent performs preliminary subject identification and distance information acquisition before generating the shake notification image. By pre-identifying the subject and obtaining its distance information in advance, the system can efficiently generate accurate notifications without adding significant complexity to the overall processing pipeline, as these preliminary steps are integrated into the existing image processing flow.
Data Source
AI summary
An image processing device including a subject detection unit configured to detect a subject in an image, a subject distance detection unit configured to detect distance information indicating a distance to the subject, a subject shake detection unit configured to detect a subject shake, a notification plane generation unit configured to generate a shake notification image for giving a notification of a subject shake of a specific subject based on the detected subject shake and the distance information, and an image superimposition unit.