ratio.c

#include<stdio.h>
#include"image.h"

double ratio(image_t *img,int y,int x)
{
  int unitH=img->height/5;
  int unitW=img->width/24;
  int sum=0;
  
  int i,j;
  int n=unitH*(y+1);
  int m=unitW*(x+1);
  for(i=unitH*y;i<n;i++)
    for(j=unitW*x;j<m;j++)
      if(img->map[i][j].g>127)sum++;
  return (double)sum/(unitH*unitW);
}

int main()
{
  char w[4][24]=
    {
      {"01!2\"3#4$5%6&7'8(9)-=^~\\"},
      {"|qQwWeErRtTyYuUiIoOpP@`["},
      {"{aAsSdDfFgGhHjJkKlL;+:*]"},
      {"}zZxXcCvVbBnNmMmM <.>/?_"},
    };
  image_t* img=read_png_file("word.png");

  image_to_gray(img);
  
  int i,j;
  for(i=0;i<4;i++)
    for(j=0;j<24;j++)
      printf("{'%c',%f,},\n",w[i][j],ratio(img,i,j));
  
  return 0;
}