sandbox/pitch: committing program to compare features (for diagnostics)

git-svn-id: https://svn.code.sf.net/p/kaldi/code/sandbox/pitch@3198 5e6a8d80-dfce-4ca6-a32a-6e07a63d50c8

src/featbin/Makefile

@@ -12,7 +12,7 @@ BINFILES = compute-mfcc-feats compute-plp-feats compute-fbank-feats \
     reverse-feats paste-feats select-feats subsample-feats process-pitch-feats \
     interpolate-pitch copy-feats-to-htk extract-rows apply-cmvn-sliding \
     compute-cmvn-stats-two-channel compute-kaldi-pitch-feats \
-    process-kaldi-pitch-feats
+    process-kaldi-pitch-feats compare-feats
 
 OBJFILES = 
 

src/featbin/compare-feats.cc

@@ -0,0 +1,98 @@
+// featbin/compare-feats.cc
+
+// Copyright 2009-2011  Microsoft Corporation
+//                2013  Johns Hopkins University (author: Daniel Povey)
+
+// See ../../COPYING for clarification regarding multiple authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//  http://www.apache.org/licenses/LICENSE-2.0
+//
+// THIS CODE IS PROVIDED *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+// WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
+// MERCHANTABLITY OR NON-INFRINGEMENT.
+// See the Apache 2 License for the specific language governing permissions and
+// limitations under the License.
+
+#include "base/kaldi-common.h"
+#include "util/common-utils.h"
+#include "matrix/kaldi-matrix.h"
+
+
+int main(int argc, char *argv[]) {
+  try {
+    using namespace kaldi;
+
+    const char *usage =
+        "Computes relative difference between two sets of features\n"
+        "Can be used to figure out how different two sets of features are.\n"
+        "Inputs must have same dimension\n"
+        "\n"
+        "Usage: compare-feats [options] <in-rspecifier1> <in-rspecifier1>\n"
+        "e.g.: compare-feats ark:1.ark ark:2.ark\n";
+
+    ParseOptions po(usage);
+    
+    po.Read(argc, argv);
+
+    if (po.NumArgs() != 2) {
+      po.PrintUsage();
+      exit(1);
+    }
+
+    std::string rspecifier1 = po.GetArg(1), rspecifier2 = po.GetArg(2);
+    
+    int32 num_done = 0, num_err = 0;
+    double prod1 = 0.0, prod2 = 0.0, cross_prod = 0.0;
+    
+    SequentialBaseFloatMatrixReader feat_reader1(rspecifier1);
+    RandomAccessBaseFloatMatrixReader feat_reader2(rspecifier2);
+
+    for (; !feat_reader1.Done(); feat_reader1.Next()) {
+      std::string utt = feat_reader1.Key();
+      const Matrix<BaseFloat> &feat1 = feat_reader1.Value();
+      if (!feat_reader2.HasKey(utt)) {
+        KALDI_WARN << "Second table has no feature for utterance "
+                   << utt;
+        num_err++;
+        continue;
+      }
+      const Matrix<BaseFloat> &feat2 = feat_reader2.Value(utt);
+      if (!SameDim(feat1, feat2)) {
+        KALDI_WARN << "Feature dimensions differ for utterance "
+                   << utt << ", " << feat1.NumRows() << " by "
+                   << feat1.NumCols() << " vs. " << feat2.NumRows()
+                   << " by " << feat2.NumCols();
+        num_err++;
+        continue;
+      }
+      prod1 += TraceMatMat(feat1, feat1, kTrans);
+      prod2 += TraceMatMat(feat2, feat2, kTrans);
+      cross_prod += TraceMatMat(feat1, feat2, kTrans);
+    }
+
+    KALDI_LOG << "Self-product of 1st features was " << prod1
+              << ", self-product of 2nd features was " << prod2
+              << ", cross-product was " << cross_prod;
+
+    double similarity_metric = cross_prod / sqrt(prod1 * prod2);
+    KALDI_LOG << "Similarity metric is " << similarity_metric
+              << " (1.0 means identical, the smaller the more different)";
+    
+    KALDI_LOG << "Processed " << num_done << " feature files, "
+              << num_err << " had errors.";
+  } catch(const std::exception &e) {
+    std::cerr << e.what();
+    return -1;
+  }
+}
+
+
+/*
+  tested with:
+ compare-feats 'ark:echo foo [ 1.0 2.0 ]|' 'ark:echo foo [ 1.0 2.0 ]|'
+*/