Function kernelGetMinMax

deps/leptonica/src/kernel.c:353–388

! * \brief kernelGetMinMax() * * \param[in] kel kernel * \param[out] pmin [optional] minimum value * \param[out] pmax [optional] maximum value * \return 0 if OK, 1 on error */

 * \return  0 if OK, 1 on error
 */
l_int32
kernelGetMinMax(L_KERNEL   *kel,
                l_float32  *pmin,
                l_float32  *pmax)
{
l_int32    sx, sy, i, j;
l_float32  val, minval, maxval;

    PROCNAME("kernelGetMinmax");

    if (!pmin && !pmax)
        return ERROR_INT("neither &min nor &max defined", procName, 1);
    if (pmin) *pmin = 0.0;
    if (pmax) *pmax = 0.0;
    if (!kel)
        return ERROR_INT("kernel not defined", procName, 1);

    kernelGetParameters(kel, &sy, &sx, NULL, NULL);
    minval = 10000000.0;
    maxval = -10000000.0;
    for (i = 0; i < sy; i++) {
        for (j = 0; j < sx; j++) {
            val = kel->data[i][j];
            if (val < minval)
                minval = val;
            if (val > maxval)
                maxval = val;
        }
    }
    if (pmin)
        *pmin = minval;
    if (pmax)
        *pmax = maxval;

    return 0;
}


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