Digital Camera Face Frame Keyframe Selection
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Solution Overview
Problem
Users of digital image processing apparatuses, such as digital cameras, face difficulty in determining the content of moving picture files from the first frame, requiring them to reproduce large portions of the moving picture to find desired content.
Innovation Solution
A method that detects face frames in moving picture files during the photographing mode, selects representative image frames, and displays these in the reproduction mode, allowing users to easily view the content without needing to reproduce the entire file.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the first frame of a moving picture is displayed to show the content, then the display is simple and quick, but the user cannot know the actual content of the moving picture
Solution Approach 1:
The patent segments the moving picture content by extracting and displaying multiple key frames (first frame, last frame, and intermediate frames with face detections) instead of showing only the first frame. This segmentation allows users to view critical moments throughout the video to understand its content without watching the entire video.
Solution Approach 2:
The system performs preliminary analysis of the moving picture by detecting faces and identifying key frames before display. This preliminary action of analyzing and selecting representative frames enables users to quickly assess video content without having to reproduce or watch through the entire video file.
2Loss of information
If the user reproduces a large portion of the moving picture to find desired content, then the user can identify the content, but the time and energy consumption increases
Solution Approach 1:
The system performs preliminary analysis by detecting faces and selecting key frames during video playback or before display. This preliminary identification of important moments allows users to quickly locate desired content without reproducing large portions of the video, significantly reducing time and energy consumption.
Solution Approach 2:
The patent introduces key frames as intermediary elements between the full video content and user perception. These key frames act as mediators that convey essential video information, allowing users to understand content without watching the entire video, thus reducing time and energy requirements.
3Device complexity
If only the first frame is displayed to represent the moving picture, then the display complexity is low, but the user convenience deteriorates
Solution Approach 1:
The patent segments video content into multiple representative key frames (first frame, last frame, and face-containing frames) for display. This segmentation provides users with multiple viewing points into the video content, significantly improving user convenience while maintaining manageable display complexity through selective frame extraction.
Data Source
AI summary
A method of controlling a digital image processing apparatus that performs a moving picture photographing mode and a reproduction mode. The method includes the operations of detecting face frames where faces of different persons exist in an operations of storing images of a series of frames in a moving picture file in the moving picture photographing mode, storing representative image frames including face frames selected from the detected face frames in the moving picture photographing mode, and displaying images of the stored representative image frames to indicate the moving picture file in the reproduction mode. The method can be performed by a controller of the digital image processing apparatus.