#include"hensu.h"

void threshold(LPDWORD image_in,LPDWORD image_out,int thresh,int mode)
{
	int x,y,n;

	for(y=0;y<iHeight;y++) 		for(x=0;x<iWidth;x++){ 			n=(BYTE)image_in[x+y*iWidth]; 			switch(mode){ 				case 2: 					if(n<=thresh) image_out[x+y*iWidth]=HIGH; 					else image_out[x+y*iWidth]=LOW; 				default: 					if(n>=thresh) image_out[x+y*iWidth]=HIGH;
					else image_out[x+y*iWidth]=LOW;
			}
		}
}

void histgram(LPDWORD image_in,long hist[256])
{
	int x,y,n;

	for(n=0;n<256;n++)
		hist[n]=0;
	
	for(y=0;y<iHeight;y++) 		for(x=0;x<iWidth;x++){ 			n=(BYTE)image_in[x+y*iWidth]; 			hist[n]++; 		} }  void histsmooth(long hist_in[256],long hist_out[256]) { 	int m,n,i; 	long sum;  	for(n=0;n<256;n++){ 		sum=0; 		for(m=-2;m<=2;m++){ 			i=n+m; 			if(i<0) i=0; 			else if(i>255) i=255;
			sum+=hist_in[i];
		}
		hist_out[n]=(long)(sum/5.0+0.5);
	}
}