COMPMID-344 Updated doxygen

Change-Id: I32f7b84daa560e460b77216add529c8fa8b327ae
diff --git a/arm_compute/core/CL/kernels/CLAbsoluteDifferenceKernel.h b/arm_compute/core/CL/kernels/CLAbsoluteDifferenceKernel.h
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+/*
+ * Copyright (c) 2016, 2017 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef __ARM_COMPUTE_CLABSOLUTEDIFFERENCEKERNEL_H__
+#define __ARM_COMPUTE_CLABSOLUTEDIFFERENCEKERNEL_H__
+
+#include "arm_compute/core/CL/ICLKernel.h"
+
+namespace arm_compute
+{
+class ICLTensor;
+
+/** Interface for the absolute difference kernel.
+ *
+ * Absolute difference is computed by:
+ * @f[ output(x,y) = | input1(x,y) - input2(x,y) | @f]
+ */
+class CLAbsoluteDifferenceKernel : public ICLKernel
+{
+public:
+    /** Default constructor. */
+    CLAbsoluteDifferenceKernel();
+    /** Prevent instances of this class from being copied (As this class contains pointers). */
+    CLAbsoluteDifferenceKernel(const CLAbsoluteDifferenceKernel &) = delete;
+    /** Prevent instances of this class from being copied (As this class contains pointers). */
+    CLAbsoluteDifferenceKernel &operator=(const CLAbsoluteDifferenceKernel &) = delete;
+    /** Allow instances of this class to be moved. */
+    CLAbsoluteDifferenceKernel(CLAbsoluteDifferenceKernel &&) = default;
+    /** Allow instances of this class to be moved. */
+    CLAbsoluteDifferenceKernel &operator=(CLAbsoluteDifferenceKernel &&) = default;
+    /** Default destructor */
+    ~CLAbsoluteDifferenceKernel() = default;
+
+    /** Set the inputs and output images.
+     *
+     * @param[in]  input1 Source tensor. Data types supported: U8/S16.
+     * @param[in]  input2 Source tensor. Data types supported: U8/S16.
+     * @param[out] output Destination tensor. Data types supported: U8/S16.
+     */
+    void configure(const ICLTensor *input1, const ICLTensor *input2, ICLTensor *output);
+
+    // Inherited methods overridden:
+    void run(const Window &window, cl::CommandQueue &queue) override;
+
+private:
+    const ICLTensor *_input1; /**< Source tensor 1. */
+    const ICLTensor *_input2; /**< Source tensor 2. */
+    ICLTensor       *_output; /**< Destination tensor. */
+};
+}
+#endif /* __ARM_COMPUTE_CLABSOLUTEDIFFERENCEKERNEL_H__ */