// Extracts features from the given blob and saves them in the tr_file_data_
// member variable.
// fontname: Name of font that this blob was printed in.
// cn_denorm: Character normalization transformation to apply to the blob.
// fx_info: Character normalization parameters computed with cn_denorm.
// blob_text: Ground truth text for the blob.
void Classify::LearnBlob(const STRING& fontname, TBLOB* blob,
const DENORM& cn_denorm,
const INT_FX_RESULT_STRUCT& fx_info,
const char* blob_text) {
CHAR_DESC CharDesc = NewCharDescription(feature_defs_);
CharDesc->FeatureSets[0] = ExtractMicros(blob, cn_denorm);
CharDesc->FeatureSets[1] = ExtractCharNormFeatures(fx_info);
CharDesc->FeatureSets[2] = ExtractIntCNFeatures(*blob, fx_info);
CharDesc->FeatureSets[3] = ExtractIntGeoFeatures(*blob, fx_info);
if (ValidCharDescription(feature_defs_, CharDesc)) {
// Label the features with a class name and font name.
tr_file_data_ += "\n";
tr_file_data_ += fontname;
tr_file_data_ += " ";
tr_file_data_ += blob_text;
tr_file_data_ += "\n";
// write micro-features to file and clean up
WriteCharDescription(feature_defs_, CharDesc, &tr_file_data_);
} else {
tprintf("Blob learned was invalid!\n");
}
FreeCharDescription(CharDesc);
} // LearnBlob
void LearnBlob(const FEATURE_DEFS_STRUCT &FeatureDefs, FILE* FeatureFile,
TBLOB* Blob, const DENORM& denorm,
const char* BlobText, const char* FontName) {
CHAR_DESC CharDesc;
ASSERT_HOST(FeatureFile != NULL);
CharDesc = ExtractBlobFeatures(FeatureDefs, denorm, Blob);
if (CharDesc == NULL) {
cprintf("LearnBLob: CharDesc was NULL. Aborting.\n");
return;
}
if (ValidCharDescription(FeatureDefs, CharDesc)) {
// label the features with a class name and font name
fprintf(FeatureFile, "\n%s %s\n", FontName, BlobText);
// write micro-features to file and clean up
WriteCharDescription(FeatureDefs, FeatureFile, CharDesc);
} else {
tprintf("Blob learned was invalid!\n");
}
FreeCharDescription(CharDesc);
} // LearnBlob
