Function kernelCreateFromPix

deps/leptonica/src/kernel.c:864–893

----------------------------------------------------------------------* * Making a kernel from a Pix * *----------------------------------------------------------------------*/ ! * \brief kernelCreateFromPix() * * \param[in] pix * \param[in] cy, cx origin of kernel * \return kernel, or NULL on error * * * Notes: * (1) The ori

 * </pre>
 */
L_KERNEL *
kernelCreateFromPix(PIX         *pix,
                    l_int32      cy,
                    l_int32      cx)
{
l_int32    i, j, w, h, d;
l_uint32   val;
L_KERNEL  *kel;

    PROCNAME("kernelCreateFromPix");

    if (!pix)
        return (L_KERNEL *)ERROR_PTR("pix not defined", procName, NULL);
    pixGetDimensions(pix, &w, &h, &d);
    if (d != 8)
        return (L_KERNEL *)ERROR_PTR("pix not 8 bpp", procName, NULL);
    if (cy < 0 || cx < 0 || cy >= h || cx >= w)
        return (L_KERNEL *)ERROR_PTR("(cy, cx) invalid", procName, NULL);

    kel = kernelCreate(h, w);
    kernelSetOrigin(kel, cy, cx);
    for (i = 0; i < h; i++) {
        for (j = 0; j < w; j++) {
            pixGetPixel(pix, j, i, &val);
            kernelSetElement(kel, i, j, (l_float32)val);
        }
    }

    return kel;
}


/*----------------------------------------------------------------------*