initfigure.c

微软的基于HMM的人脸识别原代码, 非常经典的说

/*M///////////////////////////////////////////////////////////////////////////////////////
//
//                      INTEL CORPORATION PROPRIETARY INFORMATION
//         This software is supplied under the terms of a license agreement or
//         nondisclosure agreement with Intel Corporation and may not be copied
//         or disclosed except in accordance with the terms of that agreement.
//               Copyright (c) 1999 Intel Corporation. All Rights Reserved.
//
//    RCS:
//       $Source:   initFigure.c$
//       $Revision: 00.00.05$
//      Purpose:
//      Contents:
//      Authors:
//        Sergey Oblomov
//
//M*/

#include "ats.h"

/*F///////////////////////////////////////////////////////////////////////////////////////
//    Name:    atsbInitEllipse
//    Purpose: filling the source 2D array by constant value
//    Context:
//    Parameters:
//      Src - source array
//      width - width of source array
//      height - height of source array
//      step - width step
//      x, y - center of ellipse
//      major - major axis of ellipse
//      minor - minor axis of ellipse
//      orientation - orientation of ellipse
//      value - the constant value which will be set within elipse
//    Returns:
//    Notes:
//      orientation is the angle from horisontal clockwise
//F*/
void atsbInitEllipse( uchar* Src,
                      int    width,
                      int    height,
                      int    step,
                      int    x,
                      int    y,
                      int    major,
                      int    minor,
                      float  orientation,
                      uchar  value )
{
    /* Some variables */
    int   i, j;
    float cx, cy;

    /* Filling */
    for( i = 0; i < height; i++ )
    {
        for( j = 0; j < width; j++ )
        {
            cx =  (float)((j - x) * cos( orientation ) + (i - y) * sin( orientation ));
            cy = (float)(-(j - x) * sin( orientation ) + (i - y) * cos( orientation ));
            if( (cx * cx) / (major * major) + (cy * cy) / (minor * minor) <= 1.0f )
                Src[j] = value;
            else Src[j] = 0;
        }
        Src += step;
    }
} /* atsbInitEllipse */


/*F///////////////////////////////////////////////////////////////////////////////////////
//    Name:    atsfInitEllipse
//    Purpose: filling the source 2D array by constant value
//    Context:
//    Parameters:
//      Src - source array
//      width - width of source array
//      height - height of source array
//      step - width step
//      x, y - center of ellipse
//      major - major axis of ellipse
//      minor - minor axis of ellipse
//      orientation - orientation of ellipse
//      value - the constant value which will be set within elipse
//    Returns:
//    Notes:
//      orientation is the angle from horisontal clockwise
//F*/
void atsfInitEllipse( float* Src,
                      int    width,
                      int    height,
                      int    step,
                      int    x,
                      int    y,
                      int    major,
                      int    minor,
                      float  orientation,
                      float  value )
{
    /* Some variables */
    int   i, j;
    float cx, cy;

    /* Filling */
    for( i = 0; i < height; i++ )
    {
        for( j = 0; j < width; j++ )
        {
            cx =  (float)((j - x) * cos( orientation ) + (i - y) * sin( orientation ));
            cy = (float)(-(j - x) * sin( orientation ) + (i - y) * cos( orientation ));
            if( (cx * cx) / (major * major) + (cy * cy) / (minor * minor) <= 1.0f )
                Src[j] = value;
            else Src[j] = 0;
        }
        Src = (float*)((long)Src + step);
    }
} /* atsfInitEllipse */


/* End of file. */