imagesmooth.c

在CCS环境下的一个视频采集源代码

/************************************************************************************************
*  Function   :the is a inter face of image process,user only can change mem from 54 bytes
*  Desinger    : wujiancong
*  Date        : 04.05.T07
*  Verision    : 5.0
*  Parameter   : FILE *fptr; pointer to source file pointer
*************************************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <math.h>

unsigned char *mem;
unsigned char *buffer;
static int srcwidth=720;
static int srcheight=588;



/**********************************************************************************
*
*
*                                Image Smooth
*
*
*************************************************************************************/

// template
int itemplate(unsigned char *src,unsigned char *dst,int width,\
          int height,int tempw,int temph,int tempmx,int tempmy,float fcoef,float *fparry)
{
	int i,j,k,l,m,n;
	long widthbyte=srcwidth;
	float fresult0;

	for(i=tempmx;i<height-tempmx;i++)
	{
		for(j=tempmy;j<width-tempmx;j++)
		{
			fresult0=0.0;
			for(k=0;k<temph;k++)
			{
				for(l=0;l<tempw;l++)
				{ 
					m=i-tempmy+k;n=(j-tempmx+l);
					fresult0+=(float)(*(src+m*widthbyte+n))*(*(fparry+k*tempw+l));
				}
			}
			fresult0*=fcoef;
			fresult0=fabs(fresult0);
			if(fresult0>255) *(dst+i*widthbyte+j)=(unsigned char)255;
			else *(dst+i*widthbyte+j)=(unsigned char)(fresult0+0.5);
			
		}
	}

	return 0;
}


int ImageSmooth()
{
	int i,j;
	int temph=3,tempw=3;
	int tempmx=1,tempmy=1;
	int rowbi=srcwidth*3;
	float ftmpc=1.0/16.0;
	float arry[9]={1.0,2.0,1.0,2.0,4.0,2.0,1.0,2.0,1.0};

	for(i=0;i<srcheight;i++)
		for(j=0;j<rowbi;j++)
			*(buffer+i*rowbi+j) = *(mem+i*rowbi+j);

	itemplate( mem,buffer,srcwidth,srcheight,tempw,temph,tempmx,tempmy,ftmpc,arry);
	
	for(i=0;i<srcheight;i++)
		for(j=0;j<rowbi;j++)
			*(mem+i*rowbi+j)=*(buffer+i*rowbi+j);

	return 0;
}