Face Detection Mode Switching for Speed Accuracy Trade-offs
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Solution Overview
Problem
Existing face detection systems face challenges in optimizing detection performance for various purposes, as they often compromise between detection rate, false positive detection rate, and processing speed, making it difficult to achieve balanced performance for specific applications like skin color correction and red eye correction.
Innovation Solution
A face detecting apparatus and program that generates partial images, allows mode switching between detection rate, false positive detection rate, and processing speed modes, and adjusts parameters to optimize performance based on the intended purpose, using a combination of partial image generation, forward-facing and profile face detection, and parameter changing mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the detection rate is increased, then the false positive detection rate increases, but the processing speed decreases
Solution Approach 1:
The patent implements dynamic adjustment of detection parameters based on operational mode. The system can switch between different detection strategies (e.g., strict mode for high accuracy, fast mode for high speed) allowing the detection rate and processing speed to be optimized according to specific application requirements, resolving the contradiction between these two parameters
Solution Approach 2:
The patent changes detection parameters such as threshold values and classification criteria to achieve different detection rates and false positive rates. By adjusting these parameters, the system can optimize the balance between detection accuracy and processing speed for different application scenarios
2Reliability
If the detection rate is increased, then the false positive detection rate increases
Solution Approach 1:
The system dynamically adjusts detection thresholds and classification criteria based on the operational mode selected. This allows optimization of the balance between detection rate and false positive rate, enabling high accuracy when needed while reducing false positives in other scenarios
Solution Approach 2:
The patent modifies detection parameters such as classification thresholds and feature weights to achieve different combinations of detection rate and false positive rate, allowing optimization for specific application requirements
3Object-affected harmful factors
If the false positive detection rate is decreased, then the detection rate decreases, but the processing speed increases
Solution Approach 1:
The system implements dynamic detection parameter adjustment based on operational mode, allowing optimization of the balance between false positive rate and detection rate. This resolves the contradiction by enabling different detection strategies according to specific application needs
4Object-affected harmful factors
If the false positive detection rate is decreased, then the processing speed increases
Solution Approach 1:
The patent implements dynamic adjustment of detection parameters to optimize the balance between false positive rate and processing speed. By switching between different detection modes, the system can achieve high speed with low false positives when appropriate
Data Source
AI summary
Usability of a face detecting apparatus is improved, by enabling selection of a detecting mode optimal for an intended purpose, when detecting facial images from within images. During detection of images of forward facing faces, switching of the detecting mode to one of: a detection rate mode; a false positive detection rate mode; and a processing speed mode is enabled. Face detection focused on optimizing detection performance for each detecting mode is performed.