/*!
* \brief recogCreateFromRecog()
*
* \param[in] recs source recog with arbitrary input parameters
* \param[in] scalew scale all widths to this; use 0 otherwise
* \param[in] scaleh scale all heights to this; use 0 otherwise
* \param[in] linew width of normalized strokes; use 0 to skip
* \param[in] threshold for binarization; typically ~128
* \param[in] maxyshift from nominal centroid alignment; default is 1
* \return recd, or NULL on error
*
* <pre>
* Notes:
* (1) This is a convenience function that generates a recog using
* the unscaled training data in an existing recog.
* (2) It is recommended to use %maxyshift = 1 (the default value)
* (3) See recogCreate() for use of %scalew, %scaleh and %linew.
* </pre>
*/
L_RECOG *
recogCreateFromRecog(L_RECOG *recs,
l_int32 scalew,
l_int32 scaleh,
l_int32 linew,
l_int32 threshold,
l_int32 maxyshift)
{
L_RECOG *recd;
PIXA *pixa;
PROCNAME("recogCreateFromRecog");
if (!recs)
return (L_RECOG *)ERROR_PTR("recs not defined", procName, NULL);
pixa = recogExtractPixa(recs);
recd = recogCreateFromPixa(pixa, scalew, scaleh, linew, threshold,
maxyshift);
pixaDestroy(&pixa);
return recd;
}
PIXA *MakeBootnum2(void)
{
char *fname;
l_int32 i, n, w, h;
BOX *box;
PIX *pix;
PIXA *pixa;
L_RECOG *recog;
SARRAY *sa;
/* Phase 1: generate recog from the digit data */
recog = recogCreate(20, 32, L_USE_ALL, 120, 1);
sa = getSortedPathnamesInDirectory("recog/bootnums", "png", 0, 0);
n = sarrayGetCount(sa);
for (i = 0; i < n; i++) {
/* Read each pix: grayscale, multi-character, labelled */
fname = sarrayGetString(sa, i, L_NOCOPY);
if ((pix = pixRead(fname)) == NULL) {
fprintf(stderr, "Can't read %s\n", fname);
continue;
}
/* Convert to a set of 1 bpp, single character, labelled */
pixGetDimensions(pix, &w, &h, NULL);
box = boxCreate(0, 0, w, h);
recogTrainLabelled(recog, pix, box, NULL, 1, 0);
pixDestroy(&pix);
boxDestroy(&box);
}
recogTrainingFinished(recog, 1);
sarrayDestroy(&sa);
/* Phase 2: generate pixa consisting of 1 bpp, single character pix */
pixa = recogExtractPixa(recog);
pixaWrite("/tmp/lept/recog/digits/bootnum2.pa", pixa);
recogDestroy(&recog);
return pixa;
}
