void LayerJitt::Init(const mxArray *mx_layer, Layer *prev_layer) {
//mexAssert(prev_layer->type_ == "i", "The 'j' type layer must be after the input one");
numdim_ = prev_layer->numdim_;
outputmaps_ = prev_layer->outputmaps_;
length_prev_ = prev_layer->length_prev_;
mexAssert(mexIsField(mx_layer, "mapsize"), "The 'j' type layer must contain the 'mapsize' field");
std::vector<ftype> mapsize = mexGetVector(mexGetField(mx_layer, "mapsize"));
mexAssert(mapsize.size() == numdim_, "Length of jitter mapsize vector and maps dimensionality must coincide");
mapsize_.resize(numdim_);
length_ = outputmaps_;
for (size_t i = 0; i < numdim_; ++i) {
mexAssert(1 <= mapsize[i], "In 'j' layer mapsize must be positive");
mapsize_[i] = (size_t) mapsize[i];
length_ *= mapsize_[i];
}
shift_.assign(numdim_, 0);
if (mexIsField(mx_layer, "shift")) {
shift_ = mexGetVector(mexGetField(mx_layer, "shift"));
mexAssert(shift_.size() == numdim_, "Length of jitter shift vector and maps dimensionality must coincide");
for (size_t i = 0; i < numdim_; ++i) {
mexAssert(0 <= shift_[i] && shift_[i] < mapsize_[i], "Shift in 'j' layer is out of range");
}
}
scale_.assign(numdim_, 1);
if (mexIsField(mx_layer, "scale")) {
scale_ = mexGetVector(mexGetField(mx_layer, "scale"));
mexAssert(scale_.size() == numdim_, "Length of jitter scale vector and maps dimensionality must coincide");
for (size_t i = 0; i < numdim_; ++i) {
mexAssert(1 <= scale_[i] && scale_[i] < mapsize_[i], "Scale in 'j' layer is out of range");
}
}
mirror_.assign(numdim_, false);
if (mexIsField(mx_layer, "mirror")) {
std::vector<ftype> mirror = mexGetVector(mexGetField(mx_layer, "mirror"));
mexAssert(mirror.size() == numdim_, "Length of jitter scale vector and maps dimensionality must coincide");
for (size_t i = 0; i < numdim_; ++i) {
mirror_[i] = (mirror[i] > 0);
}
}
angle_ = 0;
if (mexIsField(mx_layer, "angle")) {
angle_ = mexGetScalar(mexGetField(mx_layer, "angle"));
mexAssert(0 <= angle_ && angle_ <= 1, "Angle in 'j' layer must be between 0 and 1");
}
defval_ = 0;
if (mexIsField(mx_layer, "defval")) {
defval_ = mexGetScalar(mexGetField(mx_layer, "defval"));
} else {
// check that the transformed image is always inside the original one
std::vector<ftype> maxsize(numdim_, 0);
for (size_t i = 0; i < numdim_; ++i) {
maxsize[i] = (ftype) (mapsize_[i] - 1) * scale_[i];
}
if (angle_ > 0) {
ftype angle_inn = atan2((ftype) mapsize_[0], (ftype) mapsize_[1]) / kPi;
ftype maxsin = 1;
if (angle_inn + angle_ < 0.5) {
maxsin = sin(kPi * (angle_inn + angle_));
}
ftype maxcos = 1;
if (angle_inn > angle_) {
maxcos = cos(kPi * (angle_inn - angle_));
}
ftype maxrad = sqrt(maxsize[0]*maxsize[0] + maxsize[1]*maxsize[1]);
maxsize[0] = maxrad * maxsin;
maxsize[1] = maxrad * maxcos;
}
std::vector<ftype> oldmapsize(numdim_, 0);
for (size_t i = 0; i < numdim_; ++i) {
oldmapsize[i] = (ftype) prev_layer->mapsize_[i];
}
ftype min0 = (oldmapsize[0]/2 - 0.5) - maxsize[0]/2 - shift_[0];
ftype max0 = (oldmapsize[0]/2 - 0.5) + maxsize[0]/2 + shift_[0];
ftype min1 = (oldmapsize[1]/2 - 0.5) - maxsize[1]/2 - shift_[1];
ftype max1 = (oldmapsize[1]/2 - 0.5) + maxsize[1]/2 + shift_[1];
if (!(0 <= min0 && max0 < oldmapsize[0] && 0 <= min1 && max1 < oldmapsize[1])) {
mexPrintMsg("min1", min0); mexPrintMsg("max1", max0);
mexPrintMsg("min2", min1); mexPrintMsg("max2", max1);
mexAssert(false, "For these jitter parameters the new image is out of the original image");
}
}
}
void LayerJitt::Init(const mxArray *mx_layer, const Layer *prev_layer) {
dims_[1] = prev_layer->dims_[1];
std::vector<ftype> shift(2);
shift[0] = 0; shift[1] = 0;
if (mexIsField(mx_layer, "shift")) {
shift = mexGetVector(mexGetField(mx_layer, "shift"));
mexAssertMsg(shift.size() == 2, "Length of jitter shift vector and maps dimensionality must coincide");
for (size_t i = 0; i < 2; ++i) {
mexAssertMsg(0 <= shift[i] && shift[i] < dims_[i+2], "Shift in 'jitt' layer is out of range");
}
MatCPU shift_cpu(1, 2);
shift_cpu.assign(shift);
shift_ = shift_cpu;
}
std::vector<ftype> scale(2);
scale[0] = 1; scale[1] = 1;
if (mexIsField(mx_layer, "scale")) {
scale = mexGetVector(mexGetField(mx_layer, "scale"));
mexAssertMsg(scale.size() == 2, "Length of jitter scale vector and maps dimensionality must coincide");
for (size_t i = 0; i < 2; ++i) {
mexAssertMsg(1 <= scale[i] && scale[i] < dims_[i+2], "Scale in 'j' layer is out of range");
}
MatCPU scale_cpu(1, 2);
scale_cpu.assign(scale);
scale_ = scale_cpu;
scale_.Log();
}
if (mexIsField(mx_layer, "mirror")) {
std::vector<ftype> mirror = mexGetVector(mexGetField(mx_layer, "mirror"));
mexAssertMsg(mirror.size() == 2, "Length of jitter scale vector and maps dimensionality must coincide");
for (size_t i = 0; i < 2; ++i) {
mexAssertMsg(mirror[i] == 0 || mirror[i] == 1, "Mirror must be either 0 or 1");
}
MatCPU mirror_cpu(1, 2);
mirror_cpu.assign(mirror);
mirror_ = mirror_cpu;
}
if (mexIsField(mx_layer, "angle")) {
angle_ = mexGetScalar(mexGetField(mx_layer, "angle"));
mexAssertMsg(0 <= angle_ && angle_ <= 1, "Angle in 'j' layer must be between 0 and 1");
}
if (mexIsField(mx_layer, "defval")) {
defval_ = mexGetScalar(mexGetField(mx_layer, "defval"));
} else {
// check that the transformed image is always inside the original one
std::vector<ftype> maxsize(2, 0);
for (size_t i = 0; i < 2; ++i) {
maxsize[i] = (ftype) (dims_[i+2] - 1) * scale[i];
}
if (angle_ > 0) {
ftype angle_inn = atan2((ftype) dims_[2], (ftype) dims_[3]) / kPi;
ftype maxsin = 1;
if (angle_inn + angle_ < 0.5) {
maxsin = sin(kPi * (angle_inn + angle_));
}
ftype maxcos = 1;
if (angle_inn > angle_) {
maxcos = cos(kPi * (angle_inn - angle_));
}
ftype maxrad = (ftype) sqrt((double) (maxsize[0]*maxsize[0] + maxsize[1]*maxsize[1]));
maxsize[0] = maxrad * maxsin;
maxsize[1] = maxrad * maxcos;
}
std::vector<ftype> oldmapsize(2, 0);
for (size_t i = 0; i < 2; ++i) {
oldmapsize[i] = (ftype) prev_layer->dims_[i+2];
}
ftype min0 = ((ftype) oldmapsize[0] / 2 - (ftype) 0.5) - (ftype) maxsize[0] / 2 - shift[0];
ftype max0 = ((ftype) oldmapsize[0] / 2 - (ftype) 0.5) + (ftype) maxsize[0] / 2 + shift[0];
ftype min1 = ((ftype) oldmapsize[1] / 2 - (ftype) 0.5) - (ftype) maxsize[1] / 2 - shift[1];
ftype max1 = ((ftype) oldmapsize[1] / 2 - (ftype) 0.5) + (ftype) maxsize[1] / 2 + shift[1];
if (!(0 <= min0 && max0 < oldmapsize[0] && 0 <= min1 && max1 < oldmapsize[1])) {
mexPrintMsg("min1", min0); mexPrintMsg("max1", max0);
mexPrintMsg("min2", min1); mexPrintMsg("max2", max1);
mexAssertMsg(false, "For these jitter parameters the new image is out of the original image");
}
}
if (mexIsField(mx_layer, "eigenvectors")) {
const mxArray* mx_ev = mexGetField(mx_layer, "eigenvectors");
std::vector<size_t> ev_dim = mexGetDimensions(mx_ev);
mexAssertMsg(ev_dim.size() == 2, "The eigenvectors array must have 2 dimensions");
mexAssertMsg(ev_dim[0] == dims_[1] && ev_dim[1] == dims_[1],
"The eigenvector matrix size is wrong");
MatCPU ev_cpu(dims_[1], dims_[1]);
mexGetMatrix(mx_ev, ev_cpu);
eigenvectors_.resize(dims_[1], dims_[1]);
eigenvectors_ = ev_cpu;
if (mexIsField(mx_layer, "noise_std")) {
noise_std_ = mexGetScalar(mexGetField(mx_layer, "noise_std"));
mexAssertMsg(noise_std_ >= 0, "noise_std must be nonnegative");
} else {
mexAssertMsg(false, "noise_std is required with eigenvalues");
}
}
if (mexIsField(mx_layer, "randtest")) {
randtest_ = (mexGetScalar(mexGetField(mx_layer, "randtest")) > 0);
}
}
