class QTiffStackView(QWidget):
#the view which the user of the videoviewer sees.
#This class contains relevant 'client side' attributes e.g. buttons to get a frame, a slide bar and a timer. These attributes submit requests to the QTiffStackController to give the next frame etc. The controller returns either the requested frame or an error message
def __init__(self):
super(QTiffStackView, self).__init__()
#add the image display. This is a subclass of QLabel, where paintEvent is overriden.
self.frame_view = FrameView()
#self.frame_view.setSizePolicy(QSizePolicy.Expanding,QSizePolicy.Expanding)
#add the slide bar which allows the user to manual flick through
self.slideBar = QSlider(Qt.Horizontal)
self.slideBar.setTickPosition(QSlider.TicksAbove)
self.slideBar.setTracking(True)
self.slideBar.setTickInterval(100)
#add a counter which displays the frame which is currently displayed
self.counter = QSpinBox()
self.counter.setSingleStep(1)
self.counter.setRange(self.slideBar.minimum(), self.slideBar.maximum())
#self explanatory
self.play = QPushButton('Play')
#when play button is pressed the timer takes control of the displaying of frames
self.frametimer = QTimer()
frame_rate = 30
self.frametimer.setInterval(frame_rate)
#Add a sublayout to align the slidebar and frame counter next to eachother
slidelyt = QHBoxLayout()
slidelyt.addWidget(self.slideBar)
slidelyt.addWidget(self.counter)
#Add the main layout for the widget
lyt = QVBoxLayout()
lyt.addWidget(self.frame_view)
lyt.addLayout(slidelyt)
lyt.addWidget(self.play)
self.setLayout(lyt)
def updateRanges(self, maximum):
assert type(maximum) == int
self.slideBar.setMaximum(maximum)
self.counter.setRange(self.slideBar.minimum(), self.slideBar.maximum())
class livestream(QWidget):
i = 0
def __init__(self,qnd,images = None,annotations_on = True,annotate_coords = None,threshold_switch = False):
QWidget.__init__(self)
self.threshold_switch = threshold_switch
self.video = images #frames buffer
self.videobox = Label()
if annotations_on and annotate_coords is not None:
self.coords = annotate_coords
self.videobox.switch = annotations_on
self.videobox.activecoord = self.coords[0]
if self.video is not None:
self.videobox.activeframe = self.video[0]
self.videobox.maxintens = self.video.shape[0]
else:
self.videobox.activeframe = np.loadtxt(os.getcwd() + '/defaultimage.txt')
print(self.videobox.activeframe.shape)
self.videobox.maxintens = np.max(self.videobox.activeframe)
self.videobox.setGeometry(QtCore.QRect(70, 80, 310, 310))
self.videobox.h = 310
self.videobox.w = 310
self.lyt = QVBoxLayout()
self.lyt.addWidget(self.videobox,5)
self.setLayout(self.lyt)
self.sl = QSlider(Qt.Horizontal)
self.sl.setMinimum(0.0)
if self.video is not None:
self.sl.setMaximum(self.video.shape[0])
self.sl.valueChanged.connect(self.whenslidechanges)
self.sl.setTickPosition(QSlider.TicksAbove)
self.sl.setTracking(True)
self.sl.setTickInterval(100)
self.frame_counter = QDoubleSpinBox()
if images is not None:
self.frame = images[0]
self.frame_counter.valueChanged.connect(self.video_time_update)
self.frame_counter.setSingleStep(1)
self.frame_counter.setRange(self.sl.minimum(),self.sl.maximum())
self.frame_counter.valueChanged.connect(self.sl.setValue)
self.video_time = QDoubleSpinBox()
self.video_time.setSingleStep(30)
self.video_time.setRange(self.sl.minimum(),30*self.sl.maximum())
self.frameratetimer = QTimer()
self.frameratetimer.setInterval(30)
if self.video is not None:
self.frameratetimer.timeout.connect(self.update_display)
self.play_button = QPushButton('Play Video')
self.play_button.clicked.connect(self.frameratetimer.start)
self.stop_button = QPushButton('Stop Video')
self.stop_button.clicked.connect(self.frameratetimer.stop)
if self.video is not None:
self.sl.valueChanged.connect(self.whenslidechanges)
self.lyt.addWidget(self.play_button,0)
self.lyt.addWidget(self.stop_button,1)
self.lyt.addWidget(self.sl,2)
self.lyt.addWidget(self.frame_counter,3)
self.lyt.addWidget(self.video_time,4)
self.show()
def assign_images(self,images,centres = None):
'''#first disconnect signals from eachother so nothing should change whilst video data is being updated
self.sl.valueChanged.disconnect(self.video_time_update)
self.frameratetimer.timeout.disconnect(self.update_display)
self.frame_counter.valueChanged.disconnect(self.whenslidechanges)
'''
self.video = images
self.coords = centres
self.videobox.activeframe = self.video[0]
if self.coords is not None:
self.videobox.activecoord = self.coords[0]
#readjust slider and ticker values to dimensions of video
self.sl.setMaximum(len(self.video)-1)
self.frame_counter.setRange(self.sl.minimum(),self.sl.maximum())
self.video_time.setRange(self.sl.minimum(),30*self.sl.maximum())
#connect slider and timer etc.
self.sl.valueChanged.connect(self.whenslidechanges)
self.frameratetimer.timeout.connect(self.update_display)
self.frame_counter.valueChanged.connect(self.video_time_update)
self.videobox.maxintens = np.max(self.video)
self.videobox.update()
def update_display(self):
if self.threshold_switch:
frame = self.video[livestream.i]
threshold = threshold_otsu(frame)
mask = np.zeros_like(frame)
mask[frame > threshold] = 1
self.videobox.maxintens = 1
self.videobox.activeframe = mask
else:
#if threshold switch is off display usual video, so change active frame source and reset maximum intensity for passing to qimage2ndarray
self.videobox.activeframe = self.video[livestream.i]
self.videobox.maxintens = np.max(self.video)
try:
self.videobox.activecoord = self.coords[livestream.i]
if not self.videobox.switch:
self.videobox.switch = True
except:
self.videobox.activecoord = None
self.videobox.switch = False
self.videobox.update()
self.frame_counter.setValue(float(livestream.i))
livestream.i+=1
def whenslidechanges(self):
if self.frameratetimer.isActive():
self.frameratetimer.stop()
livestream.i = self.sl.value()
self.update_display()
livestream.i -=1
self.frameratetimer.start()
else:
livestream.i = self.sl.value()
self.update_display()
livestream.i -=1
def video_time_update(self):
self.video_time.setValue(30*self.frame_counter.value())
def turn_on_threshold(self,threshold_switch):
self.threshold_switch = threshold_switch
self.update_display()
class TrapViewer(QWidget):
i = 0
def __init__(self, qnd, images, trap_positions=None, labels=None):
QWidget.__init__(self)
self.video = images # This is a file object buffer containing the images
self.trap_positions = trap_positions
self.labels = labels
self.videobox = Label(trap_positions, labels)
self.videobox.activeframe = images.asarray(key=TrapViewer.i)
try:
self.videobox.maxintens = int(images.imagej_metadata['max'])
self.videobox.maxintens = 15265
print(images.imagej_metadata)
except KeyError:
self.videobox.maxintens = int(np.max(self.videobox.activeframe))
self.videobox.setGeometry(QtCore.QRect(70, 80, 200, 200))
self.lyt = QVBoxLayout()
self.lyt.addWidget(self.videobox, 5)
self.setLayout(self.lyt)
self.sl = QSlider(Qt.Horizontal)
self.sl.setMinimum(0.0)
self.sl.setMaximum(self.video.imagej_metadata['frames'] - 1)
self.sl.setTickPosition(QSlider.TicksAbove)
self.sl.setTracking(True)
self.sl.setTickInterval(100)
self.sl.valueChanged.connect(self.whenslidechanges)
self.frame_counter = QDoubleSpinBox()
self.frame = self.videobox.activeframe
self.frame_counter.setSingleStep(1)
self.frame_counter.setRange(self.sl.minimum(), self.sl.maximum() - 1)
self.frame_counter.valueChanged.connect(self.sl.setValue)
self.frame_counter.valueChanged.connect(self.video_time_update)
self.video_time = QDoubleSpinBox()
self.video_time.setSingleStep(30)
self.video_time.setRange(self.sl.minimum(), 30 * self.sl.maximum() - 1)
self.frameratetimer = QTimer()
self.frameratetimer.setInterval(50)
self.frameratetimer.timeout.connect(self.update_display)
self.play_button = QPushButton('Play Video')
self.play_button.clicked.connect(self.frameratetimer.start)
self.stop_button = QPushButton('Stop Video')
self.stop_button.clicked.connect(self.frameratetimer.stop)
self.sl.valueChanged.connect(self.whenslidechanges)
self.lyt.addWidget(self.play_button, 0)
self.lyt.addWidget(self.stop_button, 1)
self.lyt.addWidget(self.sl, 2)
self.lyt.addWidget(self.frame_counter, 3)
self.lyt.addWidget(self.video_time, 4)
self.show()
def update_display(self):
self.frame = self.video.asarray(key=TrapViewer.i)
self.videobox.activeframe = self.frame
self.videobox.update()
self.frame_counter.setValue(float(TrapViewer.i))
if TrapViewer.i < self.video.imagej_metadata['frames']:
TrapViewer.i += 1
def whenslidechanges(self):
if self.frameratetimer.isActive():
self.frameratetimer.stop()
TrapViewer.i = self.sl.value()
self.update_display()
TrapViewer.i -= 1
self.frameratetimer.start()
else:
TrapViewer.i = self.sl.value()
self.update_display()
TrapViewer.i -= 1
def video_time_update(self):
self.video_time.setValue(30 * self.frame_counter.value())
