<commit_before>A image processing lib, based on opencv

Functions:

0.  database connection (mysql)
     - dbconnection*
     
1.  detect the mask face using SVM
     - masked_face_detection*
     
2.  PCA and LBPH alg are used to face recognizion
     - eigenfaces*
<commit_msg>flann example<commit_after>A image processing lib, based on opencv

Functions:

0.  database connection (mysql)
     - dbconnection*
     
1.  detect the mask face using SVM
     - masked_face_detection*
     
2.  PCA and LBPH alg are used to face recognizion
     - eigenfaces*


3.  Centroid-based partitioning (Hierarchical Clustering) and multi-probe LSH algorithm examples based on the FLANN library
     - flann*

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