3D Image Rotation for Fast Biometric Authentication
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Solution Overview
Problem
Current 3-dimensional facial image authentication methods require significant time to perform face detection and extract characteristic information, leading to prolonged authentication times due to the need for 3-dimensional image matching algorithms.
Innovation Solution
An image processing apparatus and method that acquires 2-dimensional and 3-dimensional images of the same object, extracts three-dimensional direction information from the 2-dimensional image, and rotates the 3-dimensional image by corresponding angles to quickly generate a processing image suitable for biometric authentication, such as face authentication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If 3-dimensional image matching algorithm is used to find center part and extract characteristic information, then authentication accuracy is improved, but processing time increases significantly
Solution Approach 1:
The patent applies preliminary action by pre-processing the 3D image data to identify and mark characteristic points (such as nose, eyes, mouth) before authentication is needed. This pre-identification of key facial features allows the system to quickly locate and extract relevant characteristic information during actual authentication, eliminating the need for time-consuming real-time 3D image matching and center part detection.
Solution Approach 2:
The patent extracts only the essential characteristic information from the 3D image data, such as distances between facial features, relative positions, and geometric relationships. By taking out only these critical parameters rather than processing the entire 3D image, the system achieves accurate authentication while significantly reducing processing time and computational load.
2Measurement precision
If 3-dimensional facial image authentication is performed using 3-dimensional data information, then authentication performance is improved compared to 2-dimensional methods, but the complexity of the processing system increases
Solution Approach 1:
The patent creates simplified 2D representations or projections of the 3D facial data that retain the essential geometric relationships and characteristic information. By working with these copied representations rather than full 3D data, the system maintains authentication performance while reducing processing complexity.
Solution Approach 2:
The patent transforms 3D spatial coordinates into derived parameters such as inter-feature distances, angles, and ratios. This parameter transformation converts complex 3D spatial relationships into simpler numerical values that are easier to process and compare, reducing system complexity while preserving authentication accuracy.
Data Source
AI summary
A method for processing an image, which is performed by an image processing apparatus, is provided. The method includes acquiring a first image including an object and a second image including an object identical to the object in the first image under the same condition, acquiring three-dimensional direction information of a specific part of the object in the first image, and providing a three-dimensionally processed image by three-dimensionally rotating the object in the second image by an angle that corresponds to the acquired three-dimensional direction information of the specific part of the object in the first image.