*
*/
-THByteTensor *generate_vignettes(long n_problem, long nb_images);
+THByteStorage *compress(THByteStorage *x);
+
+THByteStorage *uncompress(THByteStorage *x);
+
+void seed(long s);
+
+THByteTensor *generate_vignettes(long n_problem, THLongTensor *labels);