| Author: | Kong, Minna |
| Title: | Age-invariant face recognition for high resolution face images |
| Advisors: | Lam, Kin-man (EIE) |
| Degree: | M.Sc. |
| Year: | 2019 |
| Subject: | Hong Kong Polytechnic University -- Dissertations Human face recognition (Computer science) Image analysis -- Data processing Image processing -- Digital techniques |
| Department: | Faculty of Engineering |
| Pages: | 60 pages : color illustrations |
| Language: | English |
| Abstract: | Face recognition has significant applications in modern society. One of the applications of age-invariant face recognition is that it can be applied to find missing children, and to identify them even after they have grown up. What's more, it can also be utilized for screening a watch list and searching for suspects after many years. The major obstacle for these applications is that no sufficient gallery images with subjects at different ages are available for generating recognition models. Thus, efficient facial features and matching schemes are important for this research. It has significant advanced recent years and many face recognition systems has introduced and deployed. However, there still remain many obstacles on age-invariant face recognition as ageing is a more complex progress. Generally, aging progress can affect skin (i.e. pore texture) and shape texture (i.e. wrinkles). Our project was focused on pore-scale facial features, embedding efficient matching scheme. To improve the matching performance, a locally Affine Transformation Model was introduced and applied in our age-invariant face recognition system. Based on deep features, the pore-facial keypoints was detected in the first stage. Then, by combining feature cost and keypoint location, a lower hall convex optimization problem was built and solved. Finally, the transformed keypoints in the target image can be found. In experiments section, experiment 1 shows the superiority of affine transformation on pose-invariant faces. In experiment 2, different matching scheme were compared. For matching accuracy, RANSAC performs good in High Resolution images, while Affine Transformation Model can find the true optimal matching point and perform better in removing outliers by making use of geographic information. In the last experiment, Affine Transformation Model was applied to match cross-age images. This experiment shows the robust of Affine models in cross-age images matching. |
| Rights: | All rights reserved |
| Access: | restricted access |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 991022270857503411.pdf | For All Users (off-campus access for PolyU Staff & Students only) | 1.28 MB | Adobe PDF | View/Open |
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