/*!
* recogCreateFromPixa()
*
* Input: pixa (of labelled, 1 bpp images)
* scalew (scale all widths to this; use 0 for no scaling)
* scaleh (scale all heights to this; use 0 for no scaling)
* templ_type (L_USE_AVERAGE or L_USE_ALL)
* threshold (for binarization; typically ~128)
* maxyshift (from nominal centroid alignment; typically 0 or 1)
* fontdir (<optional> directory for bitmap fonts for debugging)
* Return: recog, or null on error
*
* Notes:
* (1) This is a convenience function for training from labelled data.
* The pixa can be read from file.
* (2) The pixa should contain the unscaled bitmaps used for training.
* (3) The characters here should work as a single "font", because
* each image example is put into a class defined by its
* character label. All examples in the same class should be
* similar.
*/
L_RECOG *
recogCreateFromPixa(PIXA *pixa,
l_int32 scalew,
l_int32 scaleh,
l_int32 templ_type,
l_int32 threshold,
l_int32 maxyshift,
const char *fontdir)
{
char *text;
l_int32 full, n, i, ntext;
L_RECOG *recog;
PIX *pix;
PROCNAME("recogCreateFromPixa");
if (!pixa)
return (L_RECOG *)ERROR_PTR("pixa not defined", procName, NULL);
if (pixaVerifyDepth(pixa, NULL) != 1)
return (L_RECOG *)ERROR_PTR("not all pix are 1 bpp", procName, NULL);
pixaIsFull(pixa, &full, NULL);
if (!full)
return (L_RECOG *)ERROR_PTR("not all pix are present", procName, NULL);
n = pixaGetCount(pixa);
pixaCountText(pixa, &ntext);
if (ntext == 0)
return (L_RECOG *)ERROR_PTR("no pix have text strings", procName, NULL);
if (ntext < n)
L_ERROR("%d text strings < %d pix\n", procName, ntext, n);
recog = recogCreate(scalew, scaleh, templ_type, threshold,
maxyshift, fontdir);
if (!recog)
return (L_RECOG *)ERROR_PTR("recog not made", procName, NULL);
for (i = 0; i < n; i++) {
pix = pixaGetPix(pixa, i, L_CLONE);
text = pixGetText(pix);
if (!text || strlen(text) == 0) {
L_ERROR("pix[%d] has no text\n", procName, i);
pixDestroy(&pix);
continue;
}
recogTrainLabelled(recog, pix, NULL, text, 0, 0);
pixDestroy(&pix);
}
recogTrainingFinished(recog, 0);
return recog;
}
int main(int argc,
char **argv) {
char buf[32];
char *filein, *fileout, *fontdir, *textstr;
l_int32 n, i, maxdepth, ntext, border, lossless, display, showtext;
l_float32 scalefact;
L_BMF *bmf;
PIX *pix1, *pix2, *pix3, *pix4, *pixd;
PIXA *pixa, *pixad;
static char mainName[] = "displaypixa";
if (argc != 3 && argc != 4 && argc != 7 && argc != 8) {
fprintf(stderr, "Syntax error in displaypixa:\n"
" displaypixa filein fileout [showtext]\n"
" displaypixa filein scalefact border"
" lossless disp fileout [showtext]\n");
return 1;
}
filein = argv[1];
if ((pixa = pixaRead(filein)) == NULL)
return ERROR_INT("pixa not made", mainName, 1);
pixaCountText(pixa, &ntext);
if (argc == 3 || argc == 4)
fileout = argv[2];
if (argc == 4)
showtext = atoi(argv[3]);
/* Simple specification; no output text */
if (argc == 3 ||
(argc == 4 && (ntext == 0 || showtext == 0))) { /* no text output */
pixaVerifyDepth(pixa, &maxdepth);
pixd = pixaDisplayTiledInRows(pixa, maxdepth, 1400, 1.0, 0, 10, 0);
pixDisplay(pixd, 100, 100);
if (pixGetDepth(pixd) == 1)
pixWrite(fileout, pixd, IFF_PNG);
else
pixWrite(fileout, pixd, IFF_JFIF_JPEG);
pixDestroy(&pixd);
pixaDestroy(&pixa);
return 0;
}
/* Simple specification with output text */
if (argc == 4) { /* showtext == 1 && ntext > 0 */
n = pixaGetCount(pixa);
bmf = bmfCreate(NULL, 6);
pixad = pixaCreate(n);
for (i = 0; i < n; i++) {
pix1 = pixaGetPix(pixa, i, L_CLONE);
pix2 = pixConvertTo32(pix1);
pix3 = pixAddBorderGeneral(pix2, 10, 10, 5, 5, 0xffffff00);
textstr = pixGetText(pix1);
if (textstr && strlen(textstr) > 0) {
snprintf(buf, sizeof(buf), "%s", textstr);
pix4 = pixAddSingleTextblock(pix3, bmf, buf, 0xff000000,
L_ADD_BELOW, NULL);
} else {
pix4 = pixClone(pix3);
}
pixaAddPix(pixad, pix4, L_INSERT);
pixDestroy(&pix1);
pixDestroy(&pix2);
pixDestroy(&pix3);
}
bmfDestroy(&bmf);
pixaVerifyDepth(pixad, &maxdepth);
pixd = pixaDisplayTiledInRows(pixad, maxdepth, 1400, 1.0, 0, 10, 0);
pixDisplay(pixd, 100, 100);
if (pixGetDepth(pixd) == 1)
pixWrite(fileout, pixd, IFF_PNG);
else
pixWrite(fileout, pixd, IFF_JFIF_JPEG);
pixDestroy(&pixd);
pixaDestroy(&pixa);
pixaDestroy(&pixad);
return 0;
}
/* Full specification */
scalefact = atof(argv[2]);
border = atoi(argv[3]);
lossless = atoi(argv[4]);
display = atoi(argv[5]);
fileout = argv[6];
showtext = (argc == 8) ? atoi(argv[7]) : 0;
if (showtext && ntext == 0)
L_INFO("No text found in any of the pix\n", mainName);
bmf = (showtext && ntext > 0) ? bmfCreate(NULL, 6) : NULL;
n = pixaGetCount(pixa);
pixad = pixaCreate(n);
for (i = 0; i < n; i++) {
pix1 = pixaGetPix(pixa, i, L_CLONE);
pix2 = pixConvertTo32(pix1);
pix3 = pixAddBorderGeneral(pix2, 10, 10, 5, 5, 0xffffff00);
textstr = pixGetText(pix1);
if (bmf && textstr && strlen(textstr) > 0) {
snprintf(buf, sizeof(buf), "%s", textstr);
pix4 = pixAddSingleTextblock(pix3, bmf, buf, 0xff000000,
L_ADD_BELOW, NULL);
} else {
pix4 = pixClone(pix3);
}
pixaAddPix(pixad, pix4, L_INSERT);
pixDestroy(&pix1);
pixDestroy(&pix2);
pixDestroy(&pix3);
}
bmfDestroy(&bmf);
pixaVerifyDepth(pixad, &maxdepth);
pixd = pixaDisplayTiledInRows(pixad, maxdepth, 1400, scalefact,
0, 10, border);
if (display) pixDisplay(pixd, 20, 20);
if (pixGetDepth(pixd) == 1 || lossless)
pixWrite(fileout, pixd, IFF_PNG);
else
pixWrite(fileout, pixd, IFF_JFIF_JPEG);
pixDestroy(&pixd);
pixaDestroy(&pixa);
pixaDestroy(&pixad);
return 0;
}