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/****************************************************************************
* *
* PrimeSense Sensor 5.x Alpha *
* Copyright (C) 2011 PrimeSense Ltd. *
* *
* This file is part of PrimeSense Sensor. *
* *
* PrimeSense Sensor is free software: you can redistribute it and/or modify*
* it under the terms of the GNU Lesser General Public License as published *
* by the Free Software Foundation, either version 3 of the License, or *
* (at your option) any later version. *
* *
* PrimeSense Sensor is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public License *
* along with PrimeSense Sensor. If not, see <http://www.gnu.org/licenses/>.*
* *
****************************************************************************/
#ifndef _XNV_DOWNSCALE_H_
#define _XNV_DOWNSCALE_H_
//---------------------------------------------------------------------------
// Includes
//---------------------------------------------------------------------------
#include "XnVDepthMap.h"
#include "XnVImageMap.h"
//---------------------------------------------------------------------------
// Defines
//---------------------------------------------------------------------------
//---------------------------------------------------------------------------
// Types
//---------------------------------------------------------------------------
/**
* Downscale the XnVDepthMap or XnVImageMap.
* Scaling is done in powers of 2, and can be done in one of two methods:
* The first algorithm uses the representative method.
* For each nxn pixel box (n being the scale requested) the top left pixel is used.
* The second algorithm uses the average method.
* For each nxn pixel box the average of the data (depth in XnVDepthMap,
* color in XnVImageMap) is used.
*/
class XN_EE_FW_API XnVDownscale
{
public:
/**
* Downscale methods:
* REPRESENTATIVE - use one of the 2nx2n box as the value of the downscaled
* AVERAGE - use an average of the 2nx2n box as the value of the downscaled
*/
typedef enum
{
XNV_DSM_REPRESENTATIVE,
XNV_DSM_AVERAGE,
XNV_DSM_UNKNOWN
} XnVDownscaleMethod;
XnVDownscale();
/**
* Downscale a depth map.
*
* @param [in] dmOrigMap The original depth map
* @param [out] dmNewMap The result depth map
* @param [in] nFactor The factor of the downscale. Must be a power of 2.
* @param [in] eDMethod The downscale method, use the average of an area or a single pixel in it.
*
* @return XN_STATUS_OK on success, XN_STATUS_EE_ILLEGAL_INPUT if factor isn't a power of 2, doesn't divide either resolution or the method is unknown.
*/
XnStatus Run(const XnVDepthMap& dmOrigMap, XnVDepthMap& dmNewMap, XnUInt16 nFactor, XnVDownscaleMethod eDMethod);
/**
* Downscale an image map.
*
* @param [in] imOrigMap The original image map
* @param [out] imNewMap The result image map
* @param [in] nFactor The factor of the downscale. Must be a power of 2.
* @param [in] eDMethod The downscale method, use the average of an area or a single pixel in it.
*
* @return XN_STATUS_OK on success, XN_STATUS_EE_ILLEGAL_INPUT if factor isn't a power of 2, doesn't divide either resolution or the method is unknown.
*/
XnStatus Run(const XnVImageMap& imOrigMap, XnVImageMap& imNewMap, XnUInt16 nFactor, XnVDownscaleMethod eDMethod);
protected:
XnStatus GetShiftSize(XnUInt16 nFactor, XnInt8& nShiftSize) const;
XnStatus UseOne(const XnVDepthMap& dmOrigMap, XnVDepthMap& dmNewMap, XnUInt8 nShiftSize);
XnStatus UseAverage(const XnVDepthMap& dmOrigMap, XnVDepthMap& dmNewMap, XnUInt8 nShiftSize, XnUInt16 nFactor);
XnStatus UseOne(const XnVImageMap& dmOrigMap, XnVImageMap& dmNewMap, XnUInt8 nShiftSize);
XnStatus UseAverage(const XnVImageMap& dmOrigMap, XnVImageMap& dmNewMap, XnUInt8 nShiftSize, XnUInt16 nFactor);
XnUInt16 m_DepthDifferenceAverageThreshold;
};
#endif //_XNV_DOWNSCALE_H_
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