gammacorrection.c

一些基于TMS320 LF2407 DSP的实验程序

/***********************************************************************
** Main Function Program
***********************************************************************/ 

#include "math.h"
#include "stdio.h"
#define IMAGE_WIDTH 64
#define IMAGE_HEIGTH 64
#include "exp1_2407.h"

FILE *fi;
int i,j,k;
int y[IMAGE_HEIGTH][IMAGE_WIDTH];
unsigned char id[64];

void sys_ini()
{
     asm(" setc INTM");         //禁止所有中断
     asm(" setc SXM");          //抑制符号位扩展
     asm(" clrc OVM");          //累加器中结果正常溢出
     * SCSR1=0x81FE;            //配置时钟锁相为4倍频CLKOUT=4*7.3728=29.4912M
     * WDCR=0x00EF;             //禁止看门狗
     * IFR=0xFFFF;              //清除所有中断标志,"写1清0"
}

void nothing()
{
    return;
}

void main()
{  
        sys_ini();

	k=128;  /*k is Threshold Value*/

	fi=fopen("..\\Lena64.bmp","rb");

	for (i=0; i<=16; i++)
	{
		fread((char *)id,sizeof(char),IMAGE_WIDTH,fi);
	}
	
	fread((char *)id,sizeof(char),54,fi);
	
	for (i=0; i<IMAGE_HEIGTH; i++)
	{
		fread((char *)id,sizeof(char),IMAGE_WIDTH,fi);
		
		for (j=0; j<IMAGE_WIDTH; j++)
		{
			y[i][j]=id[j];
		}
	}
	
	fclose(fi);
	i=0;
	
	for (i=0; i<IMAGE_HEIGTH; i++)
	{
		for (j=0; j<IMAGE_WIDTH; j++)
		{
			y[i][j] = (255-y[i][j]);
		}
	}
	
	i=0;
	
	for (i=0; i<IMAGE_HEIGTH; i++)
	{
		for (j=0; j<IMAGE_WIDTH; j++)
		{
			y[i][j] = 255*((255-y[i][j])/k);
		}
	}
	
	i=0;
	i=0;
}
/***********************************************************************
** End of File 
***********************************************************************/