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diff --git a/jni/feature_mos/src/mosaic/trsMatrix.h b/jni/feature_mos/src/mosaic/trsMatrix.h
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+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * 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
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+///////////////////////////////////////////////////
+// trsMatrix.h
+// $Id: trsMatrix.h,v 1.8 2011/06/17 13:35:48 mbansal Exp $
+
+#ifndef TRSMATRIX_H_
+#define TRSMATRIX_H_
+
+
+// Calculate the determinant of a matrix
+double det33d(const double m[3][3]);
+
+// Invert a matrix
+void inv33d(const double m[3][3], double out[3][3]);
+
+// Multiply a = b * c
+void mult33d(double a[3][3], double b[3][3], double c[3][3]);
+
+// Normalize matrix so matrix[2][2] is '1'
+int normProjMat33d(double m[3][3]);
+
+inline double ProjZ(double trs[3][3], double x, double y, double f)
+{
+    return ((trs)[2][0]*(x) + (trs)[2][1]*(y) + (trs)[2][2]*(f));
+}
+
+inline double ProjX(double trs[3][3], double x, double y, double z, double f)
+{
+    return (((trs)[0][0]*(x) + (trs)[0][1]*(y) + (trs)[0][2]*(f)) / (z));
+}
+
+inline double ProjY(double trs[3][3], double x, double y, double z, double f)
+{
+    return (((trs)[1][0]*(x) + (trs)[1][1]*(y) + (trs)[1][2]*(f)) / (z));
+}
+
+
+#endif