def _openFID(self):
""" QT slot that launches the files selector to open a Varian FID file
Selecting the top level \*.fid folder will open it correctly, loading
both the image data and the procpar file.
"""
# launch the folder selection dialog
if platform.system() == 'Windows':
home = os.environ['USERPROFILE']
elif platform.system() == 'Linux':
home = os.environ['HOME']
FID = QtGui.QFileDialog.getExistingDirectory(caption="Open FID",
directory=home,
options=QtGui.QFileDialog.ShowDirsOnly)
# Open the FID file
if FID:
self.dic, self.data = ng.varian.read(str(FID))
temp = (float(self.dic['procpar']['lpe']['values'][0]) /
float(self.dic['procpar']['lro']['values'][0]))
self.aspectRatio = temp*(2*float(
self.dic['procpar']['nv']['values'][0]) /
float(self.dic['procpar']['np']['values'][0]))
# Add a DC offset corection filter
self.filterStack.insert(0, filt.makeDCO(Size=10))
# apply any default filters and recon
self.updateAll()
def _updateFilter(self):
"""Update the filter in the stack and redisplay"""
if self.filterStack == []:
return
window = self.FILTER_NAMES[str(self.windowCB.currentText())]
if (window == 'chebwin') or (window == 'gaussian') or \
(window == 'kaiser') or (window == 'slepian'):
window = (window, self.shapeSB.value())
if window == 'DC Offset':
workingFilter = filt.makeDCO()
elif self.lowpassRB.isChecked():
workingFilter = \
filt.makeLPF(Window=window,
Dim=self.dim,
Diameter=self.diameterSB.value(),
Outer=self.outerRB.isChecked(),
Cont=self.percentRB.isChecked())
elif self.highpassRB.isChecked():
workingFilter = \
filt.makeHPF(Window=window,
Dim=self.dim,
Diameter=self.diameterSB.value(),
Outer=self.outerRB.isChecked(),
Cont=self.percentRB.isChecked())
elif self.cbandstopRB.isChecked():
workingFilter = \
filt.makeBSF(Window=window,
Dim=self.dim,
Radius=self.diameterSB.value(),
Diameter=self.widthSB.value(),
Cont=self.percentRB.isChecked())
elif self.vbandstopRB.isChecked():
workingFilter = \
filt.makeVBSF(Window=window,
Dim=self.dim,
Center=self.hcenterSB.value(),
Width=self.widthSB.value())
elif self.hbandstopRB.isChecked():
workingFilter = \
filt.makeHBSF(Window=window,
Dim=self.dim,
Center=self.vcenterSB.value(),
Width=self.widthSB.value())
elif self.notchRB.isChecked():
center = (self.vcenterSB.value(), self.hcenterSB.value())
workingFilter = filt.makeNF(Window=window,
Dim=self.dim,
Center=center,
Width=self.widthSB.value())
self.filterDisplay.imshow(workingFilter.function(np.ones(self.dim)))
index = self.filterList.currentRow()
self.filterStack[index] = workingFilter
self._updateList()
self.filterList.setCurrentRow(index)