Face Detection History for Automatic Target Selection
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Solution Overview
Problem
Conventional face detection techniques in imaging devices require complex user operations to register face information and priority, making it difficult to specify the target face when multiple faces are present in an image.
Innovation Solution
An object determining device with a face detecting unit, face information recording unit, and face selecting unit that automatically selects a target face based on detection history, eliminating the need for complex user registration by using weighting methods such as detection frequency, date, and image size to prioritize faces for processing like focusing or exposure control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional face detection technique is applied to specify target face among multiple faces, then face detection capability is improved, but user operation complexity increases due to required registration of face information and priority
Solution Approach 1:
The imaging device automatically performs face detection, history recording, and target face selection without requiring user registration operations. The system serves itself by autonomously managing face information and detection history, eliminating the need for manual face priority setting while maintaining accurate face detection capability
Solution Approach 2:
The system pre-records detection history of faces in advance during normal operation. This preliminary accumulation of detection history data enables the system to automatically determine target faces later without requiring users to perform registration operations at the moment of need
2Measurement precision
If face information registration is required to specify target face, then target face specification accuracy is improved, but time consumption increases due to complicated registration operation
Solution Approach 1:
The system automatically manages face information registration by utilizing detection history data. The face information recording unit self-updates face records based on detected faces and their detection histories, eliminating the need for manual user registration operations while maintaining accurate target face specification
Solution Approach 2:
The system performs preliminary recording of face detection history during normal operation. This advance accumulation of detection data prepares the necessary face information in advance, enabling rapid and accurate target face specification without time-consuming registration operations when needed
3Extent of automation
If detection history is used for automatic face selection, then automation level is improved, but information processing complexity increases
Solution Approach 1:
The information processing is segmented into distinct functional units: face detection unit for detecting faces, face information recording unit for storing detection history, and face selecting unit for choosing target faces. This segmentation manages complexity by dividing the automated process into specialized, independent modules with clear responsibilities
Data Source
AI summary
An object determining device for selecting a target face for processing from plural faces in an image, includes a face detecting unit that detects faces from an image; a face information recording unit that records the face detected in the past by the face detecting unit and the detection history relating to this detection as associated with each other; and a face selecting unit that selects a target face for processing, from the faces included in the image based upon the detection history. The object determining device includes a face information updating unit that, in a case where the face detected by the face detecting unit is not present in the face information recording unit, newly registers the face, and in a case where the face is present, updates the face information.