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The first thing to do is to ssh into cvrl.cse.nd.edu. Using this machine give you bxgrid export permission.
Once you have logged in cvrl.cse.nd.edu. The next step is to obtain the bxgrid binary from /afs/crc.nd.edu/group/ccl/software/bxgrid/bxgrid. You can copy it to /tmp, your afs space or run it directly from ccl afs space. We recommend the last method to utilize the lastest bxgrid built.
Before starting using bxgrid, you need to provide login information, you only need to do this the first time by running this command: bxgrid biometrics login. Obtain the username and password from Dr. Flynn.
Now you are ready to export some data from bxgrid. To do that you will invoke bxgrid import command.
For example, this command will export 10 irises to /tmp/irises and the associated metadata to /tmp/meta.data:
If your conditions have any brakets and quote or double quotes, you need to add \ infront of each leter. The following command will export 10 random irises /tmp/newirises and the associated metadata to /tmp/newmeta.data
You can choose from 5 types of data:
You can export the whole collection:
Or all faces from a particular subject:
Or a single face image:
If you have a more complicated query that you don't how to handle, please contact hbui at nd.edu. You also can visit a more completed BXGrid User Manual