boolean SMLconvolveFloat(ImageProcessor dupip, float[] kernel, int kw, int kh) {
int width = dupip.getWidth();
int height = dupip.getHeight();
int x1 = 0;
int y1 = 0;
int x2 = x1 + width;
int y2 = y1 + height;
int uc = kw / 2;
int vc = kh / 2;
float[] pixels = (float[]) dupip.getPixels();
float[] pixels2 = (float[]) dupip.getSnapshotPixels();
if (pixels2 == null) pixels2 = (float[]) dupip.getPixelsCopy();
double sum;
int offset, i;
boolean edgePixel;
int xedge = width - uc;
int yedge = height - vc;
for (int y = y1; y < y2; y++) {
for (int x = x1; x < x2; x++) {
sum = 0.0;
i = 0;
edgePixel = y < vc || y >= yedge || x < uc || x >= xedge;
for (int v = -vc; v <= vc; v++) {
offset = x + (y + v) * width;
for (int u = -uc; u <= uc; u++) {
if (edgePixel) {
if (i >= kernel.length) // work around for JIT compiler bug on Linux
IJ.log("kernel index error: " + i);
sum += SMLgetPixel(x + u, y + v, pixels2, width, height) * kernel[i++];
} else sum += pixels2[offset + u] * kernel[i++];
}
}
pixels[x + y * width] = (float) (sum);
}
}
return true;
}
/**
* @param ip
* @param v
*/
public static void run(final ImageProcessor ip, final float v) {
final int w = ip.getWidth();
final int h = ip.getHeight();
final int wh = w * h;
final ImageProcessor ipTarget = ip.duplicate();
int numSaturatedPixels = 0;
do {
numSaturatedPixels = 0;
for (int i = 0; i < wh; ++i)
if (ip.getf(i) == v) {
++numSaturatedPixels;
final int y = i / w;
final int x = i % w;
float s = 0;
float n = 0;
if (y > 0) {
if (x > 0) {
final float tl = ip.getf(x - 1, y - 1);
if (tl != v) {
s += 0.5f * tl;
n += 0.5f;
}
}
final float t = ip.getf(x, y - 1);
if (t != v) {
s += t;
n += 1;
}
if (x < w - 1) {
final float tr = ip.getf(x + 1, y - 1);
if (tr != v) {
s += 0.5f * tr;
n += 0.5f;
}
}
}
if (x > 0) {
final float l = ip.getf(x - 1, y);
if (l != v) {
s += l;
n += 1;
}
}
if (x < w - 1) {
final float r = ip.getf(x + 1, y);
if (r != v) {
s += r;
n += 1;
}
}
if (y < h - 1) {
if (x > 0) {
final float bl = ip.getf(x - 1, y + 1);
if (bl != v) {
s += 0.5f * bl;
n += 0.5f;
}
}
final float b = ip.getf(x, y + 1);
if (b != v) {
s += b;
n += 1;
}
if (x < w - 1) {
final float br = ip.getf(x + 1, y + 1);
if (br != v) {
s += 0.5f * br;
n += 0.5f;
}
}
}
if (n > 0) ipTarget.setf(i, s / n);
}
ip.setPixels(ipTarget.getPixelsCopy());
} while (numSaturatedPixels > 0);
}