af::setBackend(AF_BACKEND_CUDA);
//af::setBackend(AF_BACKEND_CPU);
array img = loadimage("Test1_000000.tif",false);
array mask = constant(1.f, 19, 19);
int maxI = (int)max<unsigned char>(img);
int minI = (int)min<unsigned char>(img);
img = (img -minI)/(maxI-minI);
img = 254 -img;
img = (erode(img, mask));
img = 254 -img;
img = erode(img, mask);
saveImageNative("outt.tif", img);