Merge pull request #1456 from jyegerlehner/load-weights-from-multiple…

…-caffemodels

Load weights from multiple models by listing comma separated caffemodels
as the `-weights` arg to the caffe command.

tools/caffe.cpp

@@ -5,6 +5,7 @@
 #include <string>
 #include <vector>
 
+#include "boost/algorithm/string.hpp"
 #include "caffe/caffe.hpp"
 
 using caffe::Blob;
@@ -76,6 +77,19 @@ int device_query() {
 }
 RegisterBrewFunction(device_query);
 
+// Load the weights from the specified caffemodel(s) into the train and
+// test nets.
+void CopyLayers(caffe::Solver<float>* solver, const std::string& model_list) {
+  std::vector<std::string> model_names;
+  boost::split(model_names, model_list, boost::is_any_of(",") );
+  for (int i = 0; i < model_names.size(); ++i) {
+    LOG(INFO) << "Finetuning from " << model_names[i];
+    solver->net()->CopyTrainedLayersFrom(model_names[i]);
+    for (int j = 0; j < solver->test_nets().size(); ++j) {
+      solver->test_nets()[j]->CopyTrainedLayersFrom(model_names[i]);
+    }
+  }
+}
 
 // Train / Finetune a model.
 int train() {
@@ -112,8 +126,7 @@ int train() {
     LOG(INFO) << "Resuming from " << FLAGS_snapshot;
     solver->Solve(FLAGS_snapshot);
   } else if (FLAGS_weights.size()) {
-    LOG(INFO) << "Finetuning from " << FLAGS_weights;
-    solver->net()->CopyTrainedLayersFrom(FLAGS_weights);
+    CopyLayers(&*solver, FLAGS_weights);
     solver->Solve();
   } else {
     solver->Solve();