//
// Programa de binarização de imagems pgm, que recebe o nome
// dos ficheiros pela linha de comando
//
int main(int argc, char **argv){
int height, width, i, j, datasize;
unsigned char **imptr, *dp, limiar;
printf("Lendo imagem '%s'...\n", argv[1]);
imptr=readpgm(argv[1],&width,&height);
printf("\tOk.\n\n");
datasize=width*height;
if(!(dp=(unsigned char *)calloc(sizeof(char),datasize))){
fprintf(stderr,"writepgm: calloc error\n");
exit(0);
}
for (i=0;i<height;i++)
for (j=0;j<width;j++)
dp[i*width+j]=imptr[i][j];
#define LIMIAR 128
if (argc<4)
{
limiar = LIMIAR;
printf("Nao foi indicado na linha de comandos o limiar a utilizar.\n");
printf("\tSera usado o valor por defeito %u.\n", limiar);
}
else limiar = (unsigned char) atoi(argv[3]);
printf("Executando a funcao 'bin_img()' com o limiar %u...\n",
limiar);
bin_img(dp, width, height, limiar);
printf("\tFim.\n\n");
for(i=0;i<height;i++)
for(j=0;j<width;j++)
imptr[i][j]=dp[i*width+j];
printf("Guardando o resultado no ficheiro '%s'...\n", argv[2]);
writepgm(imptr,width,height,argv[2]);
printf("\tOk.\n\n");
}
int main(int argn, char *argv[])
{
char *inam, *onam;
pix bild;
int ox, oy, dx, dy, x, y, i, vvv = 0;
#ifdef HAVE_PAM_H
pnm_init(&argn, argv);
#endif
// skip options
for (i = 1; i < argn; i++) {
if (argv[i][0] != '-')
break;
if (!strcmp(argv[i], "-?"))
help();
else if (!strcmp(argv[i], "-help"))
help();
else if (!strcmp(argv[i], "-shrink"))
vvv |= 2;
else if (!strcmp(argv[i], "-pbm"))
vvv |= 4;
else
printf("unknown option: %s\n", argv[i]);
}
if (argn - i != 6)
help();
inam = argv[i++];
onam = argv[i++];
ox = atoi(argv[i++]);
oy = atoi(argv[i++]);
dx = atoi(argv[i++]);
dy = atoi(argv[i++]);
printf("# in=%s out=%s offs=%d,%d len=%d,%d vvv=%d\n",
inam, onam, ox, oy, dx, dy, vvv);
// ----- read picture
if (strstr(inam, ".pbm") ||
strstr(inam, ".pgm") ||
strstr(inam, ".ppm") ||
strstr(inam, ".pnm") ||
strstr(inam, ".pam"))
readpgm(inam, &bild, 1);
else if (strstr(inam, ".pcx"))
readpcx(inam, &bild, 1);
else if (strstr(inam, ".tga"))
readtga(inam, &bild, ((vvv > 1) ? 0 : 1));
else {
printf("Error: unknown suffix\n");
exit(1);
}
if (ox < 0 || ox >= bild.x)
ox = 0;
if (oy < 0 || ox >= bild.y)
oy = 0;
if (dx <= 0 || ox + dx > bild.x)
dx = bild.x - ox;
if (dy <= 0 || oy + dy > bild.y)
dy = bild.y - oy;
if ((vvv & 2) == 2 && bild.bpp == 1) { // -shrink
int x, y;
printf("# shrinking PGM: offs=%d,%d len=%d,%d\n", ox, oy, dx, dy);
for (y = 0; y < dy; y++) { // shrink upper border
for (x = 0; x < dx; x++)
if (bild.p[x + ox + (y + oy) * bild.x] < 127)
break;
if (x < dx) {
if (y > 0)
y--;
oy += y;
dy -= y;
break;
}
}
for (y = 0; y < dy; y++) { // shrink lower border
for (x = 0; x < dx; x++)
if (bild.p[ox + x + (oy + dy - y - 1) * bild.x] < 127)
break;
if (x < dx) {
if (y > 0)
y--;
dy -= y;
break;
}
}
for (x = 0; x < dx; x++) { // shrink left border
for (y = 0; y < dy; y++)
if (bild.p[x + ox + (y + oy) * bild.x] < 127)
break;
if (y < dy) {
if (x > 0)
x--;
ox += x;
dx -= x;
break;
}
}
for (x = 0; x < dx; x++) { // shrink right border
for (y = 0; y < dy; y++)
if (bild.p[ox + dx - x - 1 + (oy + y) * bild.x] < 127)
break;
if (y < dy) {
if (x > 0)
x--;
dx -= x;
break;
}
}
}
printf("# final dimension: offs=%d,%d len=%d,%d bpp=%d\n",
ox, oy, dx, dy, bild.bpp);
/* bbg: could be changed to memmoves */
// ---- new size
for (y = 0; y < dy; y++)
for (x = 0; x < dx; x++)
for (i = 0; i < 3; i++)
bild.p[i + bild.bpp * (x + dx * y)] =
bild.p[i + bild.bpp * (x + ox + (y + oy) * bild.x)];
bild.x = dx;
bild.y = dy;
// ---- write internal picture of textsite
printf("# write %s\n", onam);
if (strstr(onam, ".pbm"))
writepbm(onam, &bild);
else if (strstr(onam, ".pgm"))
writepgm(onam, &bild);
else if (strstr(onam, ".ppm"))
writeppm(onam, &bild);
else if (strstr(onam, ".pnm"))
writepgm(onam, &bild);
else
printf("Error: unknown suffix");
free( bild.p );
}
