In this project, PCA, LDA and LPP are successfully implemented in Java for face recognition. After the system is trained by the training data, the feature space “eigenfaces” through PCA, the feature space “fisherfaces” through LDA and the feature space “laplacianfaces” through LPP are found using respective methods. Later in this report, W is used to represent the obtained feature space. Once W is obtained, training faces are projected to subspace defined by W to construct FaceDB. When an unknown face is needed to recognize, this test face is firstly projected onto subspace W. Afterward, the program finds the K nearest neighbors of the projected data in FaceDB. Finally, the class label is assigned to the test face according to the majority vote among the neighbors. This classification algorithm is known as K-nearest neighbor.
The below figure shows respective feature space:
Because of the limitation of Markdown, I provide the pdf document for your reference.
Presentation: https://www.dropbox.com/s/bawrbgx78kin9xf/Face%20Recognition%20Demo.pdf
As many people asked me about this project, I decided to revamp this project into a maven project and release maven dependency to make this project easier to be used by others. In order to use this library, this first step is to add the below dependency.
<dependency>
<groupId>com.github.wihoho</groupId>
<artifactId>face-recognition</artifactId>
<version>1.0</version>
</dependency>
After that, you may refer to com.github.wihoho.TrainerTest as below on the usage of the API.
// Build a trainer
Trainer trainer = Trainer.builder()
.metric(new CosineDissimilarity())
.featureType(FeatureType.PCA)
.numberOfComponents(3)
.k(1)
.build();
...
// add training data
trainer.add(convertToMatrix(john1), "john");
trainer.add(convertToMatrix(john2), "john");
trainer.add(convertToMatrix(john3), "john");
trainer.add(convertToMatrix(smith1), "smith");
trainer.add(convertToMatrix(smith2), "smith");
trainer.add(convertToMatrix(smith3), "smith");
// train
trainer.train();
// recognize
assertEquals("john", trainer.recognize(convertToMatrix(john4)));
assertEquals("smith", trainer.recognize(convertToMatrix(smith4)));
[1] Delac, K., Grgic, M., & Grgic, S. (2005). Independent comparative study of PCA, ICA, and LDA on the FERET data set. International Journal of Imaging Systems and Technology, 15(5), 252-260.
[2] Turk, M., & Pentland, A. (1991). Eigenfaces for recognition. Journal of cognitive neuroscience, 3(1), 71-86.
[3] Belhumeur, P. N., Hespanha, J. P., & Kriegman, D. J. (1997). Eigenfaces vs. fisherfaces: Recognition using class specific linear projection. Pattern Analysis and Machine Intelligence, IEEE Transactions on, 19(7), 711-720.
[4] He, X., Yan, S., Hu, Y., Niyogi, P., & Zhang, H. J. (2005). Face recognition using laplacianfaces. Pattern Analysis and Machine Intelligence, IEEE Transactions on, 27(3), 328-340.
[5] bytefish, awesome project, https://github.com/bytefish/facerec.git
[6] ORL Database of Faces, http://www.cl.cam.ac.uk/research/dtg/attarchive/facedatabase.html
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