Function pixMorphSequence

deps/leptonica/src/morphseq.c:132–250

-------------------------------------------------------------------------* * Run a sequence of binary rasterop morphological operations * *-------------------------------------------------------------------------*/ ! * \brief pixMorphSequence() * * \param[in] pixs * \param[in] sequence string specifying sequence * \param[in] dispsep controls debug display of each res

 * </pre>
 */
PIX *
pixMorphSequence(PIX         *pixs,
                 const char  *sequence,
                 l_int32      dispsep)
{
char    *rawop, *op;
char     fname[256];
l_int32  nops, i, j, nred, fact, w, h, x, border, pdfout;
l_int32  level[4];
PIX     *pix1, *pix2;
PIXA    *pixa;
SARRAY  *sa;

    PROCNAME("pixMorphSequence");

    if (!pixs)
        return (PIX *)ERROR_PTR("pixs not defined", procName, NULL);
    if (!sequence)
        return (PIX *)ERROR_PTR("sequence not defined", procName, NULL);

        /* Split sequence into individual operations */
    sa = sarrayCreate(0);
    sarraySplitString(sa, sequence, "+");
    nops = sarrayGetCount(sa);
    pdfout = (dispsep < 0) ? 1 : 0;
    if (!morphSequenceVerify(sa)) {
        sarrayDestroy(&sa);
        return (PIX *)ERROR_PTR("sequence not valid", procName, NULL);
    }

        /* Parse and operate */
    pixa = NULL;
    if (pdfout) {
        pixa = pixaCreate(0);
        pixaAddPix(pixa, pixs, L_CLONE);
    }
    border = 0;
    pix1 = pixCopy(NULL, pixs);
    pix2 = NULL;
    x = 0;
    for (i = 0; i < nops; i++) {
        rawop = sarrayGetString(sa, i, L_NOCOPY);
        op = stringRemoveChars(rawop, " \n\t");
        switch (op[0])
        {
        case 'd':
        case 'D':
            sscanf(&op[1], "%d.%d", &w, &h);
            pix2 = pixDilateBrick(NULL, pix1, w, h);
            pixSwapAndDestroy(&pix1, &pix2);
            break;
        case 'e':
        case 'E':
            sscanf(&op[1], "%d.%d", &w, &h);
            pix2 = pixErodeBrick(NULL, pix1, w, h);
            pixSwapAndDestroy(&pix1, &pix2);
            break;
        case 'o':