diff --git a/openbr/core/qtutils.cpp b/openbr/core/qtutils.cpp
index 0c29616..a5529cc 100644
--- a/openbr/core/qtutils.cpp
+++ b/openbr/core/qtutils.cpp
@@ -285,25 +285,45 @@ void QtUtils::checkArgsSize(const QString &name, const QStringList &args, int mi
     if (args.size() > max) qFatal("%s expects no more than %d arguments, got %d", qPrintable(name), max, args.size());
 }
 
-QPointF QtUtils::toPoint(const QString &string)
+QPointF QtUtils::toPoint(const QString &string, bool *ok)
 {
-    QStringList values = string.split(',');
-    if (values.size() == 2) {
-        values[1].chop(1);
-        return QPointF(values[0].mid(1).toFloat(), values[1].toFloat());
+    if (string.startsWith('(') && string.endsWith(')')) {
+        const QStringList words = parse(string.mid(1, string.size()-2));
+        if (words.size() == 2) {
+            float x, y;
+            bool okX, okY;
+            x = words[0].toFloat(&okX);
+            y = words[1].toFloat(&okY);
+            if (okX && okY) {
+                if (ok) *ok = true;
+                return QPointF(x, y);
+            }
+        }
     }
-    else qFatal("Failed to convert %s to QPointF format.", qPrintable(string));
+
+    if (ok) *ok = false;
     return QPointF();
 }
 
-QRectF QtUtils::toRect(const QString &string)
+QRectF QtUtils::toRect(const QString &string, bool *ok)
 {
-    QStringList values = string.split(',');
-    if (values.size() == 4) {
-        values[3].chop(1);
-        return QRectF(values[0].mid(1).toFloat(), values[1].toFloat(), values[2].toFloat(), values[3].toFloat());
+    if (string.startsWith('(') && string.endsWith(')')) {
+        const QStringList words = parse(string.mid(1, string.size()-2));
+        if (words.size() == 4) {
+            float x, y, width, height;
+            bool okX, okY, okWidth, okHeight;
+            x = words[0].toFloat(&okX);
+            y = words[1].toFloat(&okY);
+            width = words[0].toFloat(&okWidth);
+            height = words[1].toFloat(&okHeight);
+            if (okX && okY && okWidth && okHeight) {
+                if (ok) *ok = true;
+                return QRectF(x, y, width, height);
+            }
+        }
     }
-    else qFatal("Failed to convert %s to QRectF format.", qPrintable(string));
+
+    if (ok) *ok = false;
     return QRectF();
 }
 
diff --git a/openbr/core/qtutils.h b/openbr/core/qtutils.h
index 4ad4743..2d842af 100644
--- a/openbr/core/qtutils.h
+++ b/openbr/core/qtutils.h
@@ -62,8 +62,8 @@ namespace QtUtils
     QString shortTextHash(QString string);
     QStringList parse(QString args, char split = ',');
     void checkArgsSize(const QString &name, const QStringList &args, int min, int max);
-    QPointF toPoint(const QString &string);
-    QRectF toRect(const QString &string);
+    QPointF toPoint(const QString &string, bool *ok = NULL);
+    QRectF toRect(const QString &string, bool *ok = NULL);
 
     /**** Process Utilities ****/
     bool runRScript(const QString &file);
diff --git a/openbr/openbr_plugin.cpp b/openbr/openbr_plugin.cpp
index 804c1ee..55d7627 100644
--- a/openbr/openbr_plugin.cpp
+++ b/openbr/openbr_plugin.cpp
@@ -125,6 +125,18 @@ QVariant File::value(const QString &key) const
     return m_metadata.contains(key) ? m_metadata.value(key) : Globals->property(qPrintable(key));
 }
 
+QVariant File::parse(const QString &value)
+{
+    bool ok;
+    const QPointF point = QtUtils::toPoint(value, &ok);
+    if (ok) return point;
+    const QRectF rect = QtUtils::toRect(value, &ok);
+    if (ok) return rect;
+    const float f = value.toFloat(&ok);
+    if (ok) return f;
+    return value;
+}
+
 void File::set(const QString &key, const QVariant &value)
 {
     if (key == "Label") {
@@ -145,35 +157,16 @@ void File::set(const QString &key, const QVariant &value)
     m_metadata.insert(key, value);
 }
 
-// Note that we assume all values within a parameter list are the same type
 void File::set(const QString &key, const QString &value)
 {
-    if (value[0] == '[') /* QVariantList */ {
-        QStringList values = value.mid(1, value.size()-2).split(", ");
+    if (value.startsWith('[') && value.endsWith(']')) {
         QList<QVariant> variants;
-        if (values[0][0] == '(') /* List of Points or Rects */ {
-            if (values[0].split(',').size() == 2) /* List of Points */ foreach(const QString &word, values) variants.append(QtUtils::toPoint(word));
-            else if (values[0].split(',').size() == 4) /* List of Rects */ foreach(const QString &word, values) variants.append(QtUtils::toRect(word));
-            else qFatal("Incorrect landmark format.");
-        }
-        else {
-            bool ok;
-            foreach(const QString &word, values) {
-                variants.append(word.toFloat(&ok));
-                if (!ok) {
-                    m_metadata.insert(key, value.split(", "));
-                    return;
-                }
-            }
-        }
-        m_metadata.insert(key, variants);
-    }
-    else if (value[0] == '(') /* Point or Rect */ {
-        if (value.split(',').size() == 2) /* QPointF */ m_metadata.insert(key, QtUtils::toPoint(value));
-        else if (value.split(',').size() == 4) /* QRectF */ m_metadata.insert(key, QtUtils::toRect(value));
-        else qFatal("Incorrect landmark format.");
+        foreach (const QString &value, QtUtils::parse(value.mid(1, value.size()-2)))
+            variants.append(parse(value));
+        set(key, QVariant(variants));
+    } else {
+        set(key, QVariant(parse(value)));
     }
-    else m_metadata.insert(key, value);
 }
 
 bool File::getBool(const QString &key, bool defaultValue) const
@@ -294,7 +287,7 @@ void File::init(const QString &file)
                 if (unnamed) setParameter(i, words[0]);
                 else         set(words[0], QVariant());
             } else {
-                set(words[0],words[1]);
+                set(words[0], words[1]);
             }
         }
         name = name.left(index);
diff --git a/openbr/openbr_plugin.h b/openbr/openbr_plugin.h
index e7a03a3..2775aee 100644
--- a/openbr/openbr_plugin.h
+++ b/openbr/openbr_plugin.h
@@ -194,6 +194,7 @@ struct BR_EXPORT File
 
     bool contains(const QString &key) const; /*!< \brief Returns \c true if the key has an associated value, \c false otherwise. */
     QVariant value(const QString &key) const; /*!< \brief Returns the value for the specified key. */
+    static QVariant parse(const QString &value); /*!< \brief Try to convert the QString to a QPointF or QRectF if possible. */
     void set(const QString &key, const QVariant &value); /*!< \brief Insert or overwrite the metadata key with the specified value. */
     void set(const QString &key, const QString &value); /*!< \brief Insert or overwrite the metadata key with the specified value. */
     inline void remove(const QString &key) { m_metadata.remove(key); } /*!< \brief Remove the metadata key. */
diff --git a/openbr/plugins/misc.cpp b/openbr/plugins/misc.cpp
index dc62225..f84e7ea 100644
--- a/openbr/plugins/misc.cpp
+++ b/openbr/plugins/misc.cpp
@@ -14,6 +14,7 @@
  * limitations under the License.                                            *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
+#include <QRegularExpression>
 #include <opencv2/highgui/highgui.hpp>
 #include "openbr_internal.h"
 #include "openbr/core/opencvutils.h"
@@ -399,6 +400,29 @@ class AsTransform : public UntrainableMetaTransform
 
 BR_REGISTER(Transform, AsTransform)
 
+/*!
+ * \ingroup transforms
+ * \brief Change the template label using a regular expresion matched to the file's base name.
+ */
+class RelabelTransform : public UntrainableMetaTransform
+{
+    Q_OBJECT
+    Q_PROPERTY(QString regexp READ get_regexp WRITE set_regexp RESET reset_regexp STORED false)
+    BR_PROPERTY(QString, regexp, "")
+
+    void project(const Template &src, Template &dst) const
+    {
+        dst = src;
+        QRegularExpression re(regexp);
+        QRegularExpressionMatch match = re.match(dst.file.baseName());
+        if (!match.hasMatch())
+            qFatal("Unable to match regular expression \"%s\" to base name \"%s\"!", qPrintable(regexp), qPrintable(dst.file.baseName()));
+        dst.file.set("Label", match.captured(match.lastCapturedIndex()));
+    }
+};
+
+BR_REGISTER(Transform, RelabelTransform)
+
 }
 
 #include "misc.moc"