cvcolor.c

Xilinx ISE&EDK 8.2平台的人脸检测系统设计

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/********************************* COPYRIGHT NOTICE *******************************\
  The function for RGB to Lab conversion is based on the MATLAB script
  RGB2Lab.m translated by Mark Ruzon from C code by Yossi Rubner, 23 September 1997.
  See the page [http://vision.stanford.edu/~ruzon/software/rgblab.html]
\**********************************************************************************/

/********************************* COPYRIGHT NOTICE *******************************\
  Original code for Bayer->BGR/RGB conversion is provided by Dirk Schaefer
  from MD-Mathematische Dienste GmbH. Below is the copyright notice:

    IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
    By downloading, copying, installing or using the software you agree
    to this license. If you do not agree to this license, do not download,
    install, copy or use the software.

    Contributors License Agreement:

      Copyright (c) 2002,
      MD-Mathematische Dienste GmbH
      Im Defdahl 5-10
      44141 Dortmund
      Germany
      www.md-it.de
  
    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. 
    The name of Contributor may not 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 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.
\**********************************************************************************/

#include "_cv.h"

typedef CvStatus (CV_STDCALL * CvColorCvtFunc0)(
    const void* src, int srcstep, void* dst, int dststep, CvSize size );

typedef CvStatus (CV_STDCALL * CvColorCvtFunc1)(
    const void* src, int srcstep, void* dst, int dststep,
    CvSize size, int param0 );

typedef CvStatus (CV_STDCALL * CvColorCvtFunc2)(
    const void* src, int srcstep, void* dst, int dststep,
    CvSize size, int param0, int param1 );

typedef CvStatus (CV_STDCALL * CvColorCvtFunc3)(
    const void* src, int srcstep, void* dst, int dststep,
    CvSize size, int param0, int param1, int param2 );

/****************************************************************************************\
*                 Various 3/4-channel to 3/4-channel RGB transformations                 *
\****************************************************************************************/

#define CV_IMPL_BGRX2BGR( flavor, arrtype )                             \
static CvStatus CV_STDCALL                                              \
icvBGRx2BGR_##flavor##_CnC3R( const arrtype* src, int srcstep,          \
                              arrtype* dst, int dststep,                \
                              CvSize size, int src_cn, int blue_idx )   \
{                                                                       \
    int i;                                                              \
                                                                        \
    srcstep /= sizeof(src[0]);                                          \
    dststep /= sizeof(dst[0]);                                          \
    srcstep -= size.width*src_cn;                                       \
    size.width *= 3;                                                    \
                                                                        \
    for( ; size.height--; src += srcstep, dst += dststep )              \
    {                                                                   \
        for( i = 0; i < size.width; i += 3, src += src_cn )             \
        {                                                               \
            arrtype t0=src[blue_idx], t1=src[1], t2=src[blue_idx^2];    \
            dst[i] = t0;                                                \
            dst[i+1] = t1;                                              \
            dst[i+2] = t2;                                              \
        }                                                               \
    }                                                                   \
                                                                        \
    return CV_OK;                                                       \
}


#define CV_IMPL_BGR2BGRX( flavor, arrtype )                             \
static CvStatus CV_STDCALL                                              \
icvBGR2BGRx_##flavor##_C3C4R( const arrtype* src, int srcstep,          \
                              arrtype* dst, int dststep,                \
                              CvSize size, int blue_idx )               \
{                                                                       \
    int i;                                                              \
                                                                        \
    srcstep /= sizeof(src[0]);                                          \
    dststep /= sizeof(dst[0]);                                          \
    srcstep -= size.width*3;                                            \
    size.width *= 4;                                                    \
                                                                        \
    for( ; size.height--; src += srcstep, dst += dststep )              \
    {                                                                   \
        for( i = 0; i < size.width; i += 4, src += 3 )                  \
        {                                                               \
            arrtype t0=src[blue_idx], t1=src[1], t2=src[blue_idx^2];    \
            dst[i] = t0;                                                \
            dst[i+1] = t1;                                              \
            dst[i+2] = t2;                                              \
            dst[i+3] = 0;                                               \
        }                                                               \
    }                                                                   \
                                                                        \
    return CV_OK;                                                       \
}


#define CV_IMPL_BGRA2RGBA( flavor, arrtype )                            \
static CvStatus CV_STDCALL                                              \
icvBGRA2RGBA_##flavor##_C4R( const arrtype* src, int srcstep,           \
                             arrtype* dst, int dststep, CvSize size )   \
{                                                                       \
    int i;                                                              \
                                                                        \
    srcstep /= sizeof(src[0]);                                          \
    dststep /= sizeof(dst[0]);                                          \
    size.width *= 4;                                                    \
                                                                        \
    for( ; size.height--; src += srcstep, dst += dststep )              \
    {                                                                   \
        for( i = 0; i < size.width; i += 4 )                            \
        {                                                               \
            arrtype t0 = src[2], t1 = src[1], t2 = src[0], t3 = src[3]; \
            dst[i] = t0;                                                \
            dst[i+1] = t1;                                              \
            dst[i+2] = t2;                                              \
            dst[i+3] = t3;                                              \
        }                                                               \
    }                                                                   \
                                                                        \
    return CV_OK;                                                       \
}


CV_IMPL_BGRX2BGR( 8u, uchar )
CV_IMPL_BGRX2BGR( 16u, ushort )
CV_IMPL_BGRX2BGR( 32f, int )
CV_IMPL_BGR2BGRX( 8u, uchar )
CV_IMPL_BGR2BGRX( 16u, ushort )
CV_IMPL_BGR2BGRX( 32f, int )
CV_IMPL_BGRA2RGBA( 8u, uchar )
CV_IMPL_BGRA2RGBA( 16u, ushort )
CV_IMPL_BGRA2RGBA( 32f, int )


/****************************************************************************************\
*           Transforming 16-bit (565 or 555) RGB to/from 24/32-bit (888[8]) RGB          *
\****************************************************************************************/

static CvStatus CV_STDCALL
icvBGR5x52BGRx_8u_C2CnR( const uchar* src, int srcstep,
                         uchar* dst, int dststep,
                         CvSize size, int dst_cn,
                         int blue_idx, int green_bits )
{
    int i;
    assert( green_bits == 5 || green_bits == 6 );
    dststep -= size.width*dst_cn;

    for( ; size.height--; src += srcstep, dst += dststep )
    {
        if( green_bits == 6 )
            for( i = 0; i < size.width; i++, dst += dst_cn )
            {
                unsigned t = ((const ushort*)src)[i];
                dst[blue_idx] = (uchar)(t << 3);
                dst[1] = (uchar)((t >> 3) & ~3);
                dst[blue_idx ^ 2] = (uchar)((t >> 8) & ~7);
                if( dst_cn == 4 )
                    dst[3] = 0;
            }
        else
            for( i = 0; i < size.width; i++, dst += dst_cn )
            {
                unsigned t = ((const ushort*)src)[i];
                dst[blue_idx] = (uchar)(t << 3);
                dst[1] = (uchar)((t >> 2) & ~7);
                dst[blue_idx ^ 2] = (uchar)((t >> 7) & ~7);
                if( dst_cn == 4 )
                    dst[3] = 0;
            }
    }

    return CV_OK;
}


static CvStatus CV_STDCALL
icvBGRx2BGR5x5_8u_CnC2R( const uchar* src, int srcstep,
                         uchar* dst, int dststep,
                         CvSize size, int src_cn,
                         int blue_idx, int green_bits )
{
    int i;
    srcstep -= size.width*src_cn;

    for( ; size.height--; src += srcstep, dst += dststep )
    {
        if( green_bits == 6 )
            for( i = 0; i < size.width; i++, src += src_cn )
            {
                int t = (src[blue_idx] >> 3)|((src[1]&~3) << 3)|((src[blue_idx^2]&~7) << 8);
                ((ushort*)dst)[i] = (ushort)t;
            }
        else
            for( i = 0; i < size.width; i++, src += src_cn )
            {
                int t = (src[blue_idx] >> 3)|((src[1]&~7) << 2)|((src[blue_idx^2]&~7) << 7);
                ((ushort*)dst)[i] = (ushort)t;
            }
    }

    return CV_OK;
}



/////////////////////////// IPP Color Conversion Functions //////////////////////////////

icvRGB2XYZ_8u_C3R_t  icvRGB2XYZ_8u_C3R_p = 0;
icvRGB2XYZ_16u_C3R_t icvRGB2XYZ_16u_C3R_p = 0;
icvRGB2XYZ_32f_C3R_t icvRGB2XYZ_32f_C3R_p = 0;
icvXYZ2RGB_8u_C3R_t  icvXYZ2RGB_8u_C3R_p = 0;
icvXYZ2RGB_16u_C3R_t icvXYZ2RGB_16u_C3R_p = 0;