//the main functions :
struct vector *img_to_blocks(struct matrix *img)
{
struct coords init;
struct vector *output;
//all the text is within the square ((w1,h1),(w2,h2))
size_t i = 0;
for(; i < img->height - 1 && line_is_empty(img, i, 0, img->width - 1); i++){}
init.h1 = i;
for(i = img->height - 1; i > 0 && line_is_empty(img, i, 0, img->width - 1); i--){}
init.h2 = i;
for(i = 0; i < img->width - 1 && column_is_empty(img, i, init.h1, init.h2); i++){}
init.w1 = i;
for(i = img->width - 1; i > 0 && column_is_empty(img, i, init.h1, init.h2); i--){}
init.w2 = i;
//we create a matrix with appearant blocks
struct matrix *M = malloc(sizeof(struct matrix));
M->data = malloc(sizeof(double) * img->width * img->height);
M->width = img->width, M->height = img->height;
for(size_t i = 0; i < img->width * img->height; i++)
{
M->data[i] = img->data[i];
}
for(size_t i = 0; i < 5; i++)
{
filter_noise(M);
if(i % 2)
filter_contrast(M);
}
//we launch the block detection in that original block
if(init.w1 < init.w2 && init.h1 < init.h2)
output = vertical_rec(M, init, 1);
else
output = NULL; //invalid image.
free(M->data);
free(M);
return output;
}
int filter_oldtv(int color)
{
return (filter_grey(filter_line_h(filter_noise(filter_canal(color)))));
}
