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diff --git a/src/core/LogOps.h b/src/core/LogOps.h
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+++ b/src/core/LogOps.h
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+/*
+Copyright (c) 2003-2010 Sony Pictures Imageworks Inc., et al.
+All Rights Reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+* Redistributions of source code must retain the above copyright
+  notice, this list of conditions and the following disclaimer.
+* Redistributions in binary form must reproduce the above copyright
+  notice, this list of conditions and the following disclaimer in the
+  documentation and/or other materials provided with the distribution.
+* Neither the name of Sony Pictures Imageworks nor the names of its
+  contributors may be used to endorse or promote products derived from
+  this software without specific prior written permission.
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+
+#ifndef INCLUDED_OCIO_LOGOPS_H
+#define INCLUDED_OCIO_LOGOPS_H
+
+#include <OpenColorIO/OpenColorIO.h>
+
+#include "Op.h"
+
+#include <vector>
+
+OCIO_NAMESPACE_ENTER
+{
+    // output = k * log(mx+b, base) + kb
+    // This does not affect alpha
+    // In the forward direction this is lin->log
+    // All input vectors are size 3 (including base)
+    
+    void CreateLogOp(OpRcPtrVec & ops,
+                     const float * k,
+                     const float * m,
+                     const float * b,
+                     const float * base,
+                     const float * kb,
+                     TransformDirection direction);
+    
+}
+OCIO_NAMESPACE_EXIT
+
+#endif