bob.paper.SCIA2015 1.0.2

This package

The installation of this package relies on the BuildOut system. By default, the command line sequence:

$ python bootstrap-buildout.py
$ ./bin/buildout

should download and install all required packages of Bob in the versions that we used to produce the results. Other versions of the packages might generate sightly different results.

Databases

Experiments are executed based on two publicly available image databases. The evaluation protocols for both databases are included into this package:

• To get a copy of the MOBIO database, please follow the Download Instructions, and download the IMAGES_PNG.tar.gz and the IMAGE_ANNOTATIONS.tar.gz.

• The images of the Labeled Faces in the Wild database can be downloaded from the database URL. Our experiments rely on the images aligned with funneling (not the ones aligned with deep funneling), and automatic annotations.

Protocol:

The test are performed on two face data sets: MOBIO and Labeled Faces in Wild (LFW).

1. MOBIO: The evaluation protocol we use consists of training, development and test sets. The number of images in each set are: 9598 in Training set, 9586 in Development set and 9592 in Test set.

2. LFW: The data set consists of more than 13,000 images collected from web. The images are split into 5 non-overlapping partitions and on each test round four partition are used for training and the fifth one is used for testing. The accuracy is reported as the mean over the five sets.

Algorithms:

The following algorithms are implemented:

• PCA + LDA: PCA is used with 98% variance and Linear Discriminant Analysis is used as the classifier.

• LBPHS + LDA: Uniform Local Binary Patterns (LBP) features are extracted from the images by dividing it into 6x6 cells. The LBP features from different cells are concatenated and the same PCA + LDA classifier is used.

• MB-LBP + LUT Boosting: Multi Block- LBP features of square shape are extracted from face images. The block size is varied from 1 to 7. The features are boosted with LUT as the weak classifier.

• OBP + LUT Boosting: OBP features of square shape are extracted from the images. The block size is varied from 1 to 7. The features are boosted with LUT as the weak classifier.

• LBP + LUT Boosting (not part of the paper): LPB features in a single scale are extracted from the images. The features are boosted with LUT as the weak classifier.

User Guide:

To reproduce the results from the paper use the following commands:

1. Image preprocessing:

   $ ./bin/preprocess.py -d mobio -i <MOBIO-IMAGE-DIRECTORY> -a <MOBIO-ANNOTATION-DIRECTORY> -vv
   $ ./bin/preprocess.py -d lfw -i <LFW-FUNNELED-IMAGE-DIRECTORY> -a <LFW-FUNNELED-ANNOTATION-DIRECTORY> -vv

2. PCA+LDA on raw pixel values:

   $ ./bin/pca_lda.py -d mobio lfw -vv

3. PCA+LDA on LBPHS features:

   $ ./bin/pca_lda.py -d mobio lfw -vv -l

4. Boosting with three types of features: MB-LBP, OBP, and LBP (just for comparison, not in the paper):

   $ ./bin/lbp_boosting.py -d mobio lfw -vv
   $ ./bin/lbp_boosting.py -d mobio lfw -vv -o
   $ ./bin/lbp_boosting.py -d mobio lfw -vv -b 1

5. Evaluation:

   $ ./bin/evaluate.py -d mobio lfw -vv

The last command will print out the results as they are reported in Table 1 of the Paper and generate the ROC curves as shown in Figure 5 of the Paper.