Shooting Condition Controller for Face Authentication Accuracy
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Solution Overview
Problem
Existing information processing systems using shot images for user authentication face challenges in maintaining accuracy and stability, particularly when the shooting environment changes, leading to user inconvenience and potential misauthentication.
Innovation Solution
An information processing device and method that includes an image acquirer, a registered user information holder, a face authentication section, and a shooting condition controller, which adjusts the shooting conditions to match the characteristics of the face image in the shot image with the registered face identification data, ensuring accurate authentication by minimizing the impact of environmental changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If face authentication is performed using shot images in varying shooting environments, then authentication speed and user convenience are improved, but authentication accuracy deteriorates due to environmental changes
Solution Approach 1:
The patent adjusts shooting parameters (exposure, gain, white balance) to transform images shot in varying environments into a standardized format that matches registered face images. This parameter normalization ensures that environmental variations do not affect authentication accuracy, resolving the contradiction between convenience and precision.
Solution Approach 2:
The patent introduces an image processing intermediary that acts as a bridge between the shot image and the authentication algorithm. This intermediary performs shooting condition adjustment to create a standardized representation that is invariant to environmental changes, thereby maintaining accuracy while enabling flexible shooting conditions.
2Measurement precision
If shooting conditions are adjusted to match registered face image characteristics, then authentication accuracy is improved, but system complexity increases
Solution Approach 1:
The patent implements self-service by having the system automatically detect shooting conditions and adjust parameters without user intervention. The shooting condition adjustment unit autonomously analyzes the shot image characteristics and modifies parameters to match registered data, reducing complexity from the user perspective while maintaining high accuracy.
Solution Approach 2:
The patent performs preliminary adjustment of shooting conditions before authentication processing. By pre-normalizing the shot image to match registered face image characteristics, the system simplifies the subsequent authentication process and reduces overall system complexity through staged processing.
3Reliability
If multiple shooting condition adjustments are performed to optimize authentication results, then authentication reliability is improved, but processing time increases
Solution Approach 1:
The patent applies partial adjustment by selectively modifying only the shooting parameters that significantly impact authentication accuracy. Rather than exhaustively adjusting all possible parameters, the system focuses on critical parameters (exposure, gain, white balance), achieving high reliability with minimal processing overhead.
Solution Approach 2:
The patent performs shooting condition adjustment as a preliminary step before authentication processing. This staged approach separates parameter optimization from authentication decision-making, allowing efficient parallel processing and reducing overall processing time while maintaining high reliability.
Data Source
AI summary
An information processing device includes: an image acquirer configured to acquire a shot image of a user from an imaging device; a registered user information holder configured to hold face identification data of a registered user; a face authentication section configured to execute authentication processing of a face image in the shot image by using the face identification data held in the registered user information holder; a shooting condition controller configured to adjust a shooting condition to bring a characteristic of the face image close to a characteristic of a face image of an acquisition source of the face identification data and make the imaging device perform shooting in order to improve an authentication result in the face authentication section; and an information processing section configured to execute information processing on the basis of an authentication result of a face image obtained by adjustment.