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IMAQdxCamera: optional autoscaling, and background subtraction #87

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IMAQdxCamera: optional autoscaling, and background subtraction #87

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45 changes: 45 additions & 0 deletions labscript_devices/IMAQdxCamera/blacs_tab.ui
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Original file line number Diff line number Diff line change
Expand Up @@ -44,6 +44,51 @@
</property>
</widget>
</item>
<item>
<widget class="QPushButton" name="pushButtonAutoLevels">
<property name="toolTip">
<string>Auto scale image levels and histogram range</string>
</property>
<property name="text">
<string>Auto Levels</string>
</property>
<property name="icon">
<iconset>
<normaloff>:/qtutils/fugue/gradient.png</normaloff>:/qtutils/fugue/gradient.png</iconset>
</property>
<property name="checkable">
<bool>true</bool>
</property>
</widget>
</item>
<item>
<widget class="QPushButton" name="pushButton_set_bg">
<property name="toolTip">
<string>Set current image as the background, to be subtracted from displayed images</string>
</property>
<property name="text">
<string>Set background</string>
</property>
<property name="icon">
<iconset>
<normaloff>:/qtutils/fugue/image--plus.png</normaloff>:/qtutils/fugue/image--plus.png</iconset>
</property>
</widget>
</item>
<item>
<widget class="QPushButton" name="pushButton_clear_bg">
<property name="toolTip">
<string>Clear the background image</string>
</property>
<property name="text">
<string>Clear background</string>
</property>
<property name="icon">
<iconset>
<normaloff>:/qtutils/fugue/image--minus.png</normaloff>:/qtutils/fugue/image--minus.png</iconset>
</property>
</widget>
</item>
<item>
<widget class="QPushButton" name="pushButton_snap">
<property name="toolTip">
Expand Down
67 changes: 55 additions & 12 deletions labscript_devices/IMAQdxCamera/blacs_tabs.py
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Original file line number Diff line number Diff line change
Expand Up @@ -50,13 +50,15 @@ class ImageReceiver(ZMQServer):
"""ZMQServer that receives images on a zmq.REP socket, replies 'ok', and updates the
image widget and fps indicator"""

def __init__(self, image_view, label_fps):
def __init__(self, image_view, label_fps, autolevels_button):
ZMQServer.__init__(self, port=None, dtype='multipart')
self.image_view = image_view
self.label_fps = label_fps
self.last_frame_time = None
self.frame_rate = None
self.update_event = None
self.image = None
self.bg_image = None
self.autolevels_button = autolevels_button

@inmain_decorator(wait_for_return=True)
def handler(self, data):
Expand All @@ -80,14 +82,10 @@ def handler(self, data):
else:
self.frame_rate = 1 / dt
self.last_frame_time = this_frame_time
if self.image_view.image is None:
# First time setting an image. Do autoscaling etc:
self.image_view.setImage(image.swapaxes(-1, -2))
else:
# Updating image. Keep zoom/pan/levels/etc settings.
self.image_view.setImage(
image.swapaxes(-1, -2), autoRange=False, autoLevels=False
)

self.image = image
self.update_image()

# Update fps indicator:
if self.frame_rate is not None:
self.label_fps.setText(f"{self.frame_rate:.01f} fps")
Expand All @@ -105,6 +103,34 @@ def handler(self, data):
QtGui.QApplication.instance().sendPostedEvents()
return self.NO_RESPONSE

@inmain_decorator(wait_for_return=True)
def update_image(self):
image = self.image
if self.bg_image is not None:
image = self.image.astype(float) - self.bg_image.astype(float)
autolevels = self.autolevels_button.isChecked()
if self.image_view.image is None:
# First time setting an image. Do autoscaling etc:
self.image_view.setImage(image.swapaxes(-1, -2))
else:
self.image_view.setImage(
image.swapaxes(-1, -2),
autoRange=False,
autoLevels=autolevels,
autoHistogramRange=autolevels,
)

@inmain_decorator()
def set_bg_image(self):
self.bg_image = self.image
self.update_image()

@inmain_decorator()
def clear_bg_image(self):
self.bg_image = None
self.update_image()



class IMAQdxCameraTab(DeviceTab):
# Subclasses may override this if all they do is replace the worker class with a
Expand All @@ -128,6 +154,8 @@ def initialise_GUI(self):
self.ui.pushButton_snap.clicked.connect(self.on_snap_clicked)
self.ui.pushButton_attributes.clicked.connect(self.on_attributes_clicked)
self.ui.toolButton_nomax.clicked.connect(self.on_reset_rate_clicked)
self.ui.pushButton_set_bg.clicked.connect(self.on_set_bg_clicked)
self.ui.pushButton_clear_bg.clicked.connect(self.on_clear_bg_clicked)

self.attributes_dialog = UiLoader().load(attributes_ui_filepath)
self.attributes_dialog.setParent(self.ui.parent())
Expand All @@ -146,6 +174,7 @@ def initialise_GUI(self):
)
self.ui.horizontalLayout.addWidget(self.image)
self.ui.pushButton_stop.hide()
self.ui.pushButton_clear_bg.hide()
self.ui.doubleSpinBox_maxrate.hide()
self.ui.toolButton_nomax.hide()
self.ui.label_fps.hide()
Expand All @@ -163,7 +192,9 @@ def initialise_GUI(self):
widget.setSizePolicy(size_policy)

# Start the image receiver ZMQ server:
self.image_receiver = ImageReceiver(self.image, self.ui.label_fps)
self.image_receiver = ImageReceiver(
self.image, self.ui.label_fps, self.ui.pushButtonAutoLevels
)
self.acquiring = False

self.supports_smart_programming(self.use_smart_programming)
Expand All @@ -173,7 +204,8 @@ def get_save_data(self):
'attribute_visibility': self.attributes_dialog.comboBox.currentText(),
'acquiring': self.acquiring,
'max_rate': self.ui.doubleSpinBox_maxrate.value(),
'colormap': repr(self.image.ui.histogram.gradient.saveState())
'colormap': repr(self.image.ui.histogram.gradient.saveState()),
'autolevels': self.ui.pushButtonAutoLevels.isChecked(),
}

def restore_save_data(self, save_data):
Expand All @@ -188,6 +220,7 @@ def restore_save_data(self, save_data):
self.image.ui.histogram.gradient.restoreState(
ast.literal_eval(save_data['colormap'])
)
self.ui.pushButtonAutoLevels.setChecked(save_data.get('autolevels', False))


def initialise_workers(self):
Expand Down Expand Up @@ -259,6 +292,16 @@ def on_stop_clicked(self, button):
self.acquiring = False
self.stop_continuous()

def on_set_bg_clicked(self, button):
self.image_receiver.set_bg_image()
self.ui.pushButton_set_bg.hide()
self.ui.pushButton_clear_bg.show()

def on_clear_bg_clicked(self, button):
self.image_receiver.clear_bg_image()
self.ui.pushButton_set_bg.show()
self.ui.pushButton_clear_bg.hide()

def on_copy_clicked(self, button):
text = self.attributes_dialog.plainTextEdit.toPlainText()
clipboard = QtGui.QApplication.instance().clipboard()
Expand Down