Image Shooting Device Priority Face Re-identification
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Solution Overview
Problem
Conventional image shooting devices face challenges in maintaining focus on a priority face when it becomes temporarily undetectable, such as being hidden behind another subject or moving out of the camera's view, due to limitations in face identification processing.
Innovation Solution
The device employs an image sensing portion, face detection portion, priority face choice portion, and re-choice portion to detect and re-choose the priority face using retained position information and additional features, adjusting search ranges based on the face's movement and previous detection data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If identification processing based on position information is used to follow up a priority face, then the processing complexity is reduced and face following is achieved through simple processing, but when the priority face becomes temporarily undetectable (e.g., shielded by another subject), the system cannot maintain identification of the original priority face and may incorrectly switch to another face
Solution Approach 1:
The system performs preliminary actions by detecting and storing position information of all faces in advance before the priority face becomes undetectable. When the priority face is temporarily shielded, the system can retrieve the stored position information and continue tracking the original priority face by searching within a predetermined range from the stored position, rather than switching to another detected face.
Solution Approach 2:
The system creates a copy of the position information for the priority face and stores it in advance. This copied position data serves as a reference that allows the system to maintain identification of the original priority face even when it becomes temporarily undetectable, preventing incorrect switching to other faces.
2Productivity
If the system continuously searches for the priority face using standard identification processing, then the face can be tracked when visible, but when the face is shielded or moves out of view, the system fails to maintain focus on the original priority face
Solution Approach 1:
The system performs preliminary detection and stores position information of the priority face before it becomes undetectable. This advance preparation enables the system to maintain tracking by searching within a predetermined range from the stored position when the face is temporarily shielded, rather than losing track and requiring re-detection.
Solution Approach 2:
The system uses stored position information as feedback to guide the search when the priority face becomes undetectable. By referencing the previously stored position and searching within a predetermined range from that position, the system can efficiently recover and maintain tracking of the original priority face when it reappears.
Data Source
AI summary
An image shooting device with an image sensing portion that acquires a series of input images formed in chronological order; a face detection portion that, detects a human face from each input image outputting position information of the detected face; a priority face choice portion that chooses a priority face from the detected faces; an identification portion that, searches for the priority face; and a re-choice portion that, when the priority face is detected from a first input image acquired but the priority face is not detected by the identification portion from a second input image retains information including position information executes a re-choice processing to re-choose the priority face searching within the third input image for a face to be re-chosen as a priority face.