def acquire(camera_index=0,
keep_connection=False,
rgb=False,
device: VideoCapture = None):
"""
Acquires an image from the computer's webcam and returns it.
If the computer has multiple cameras, you can specify the index as parameter.
Parameters
----------
camera_index: int
zero based camera inde
keep_connection: bool
if true, the connection will be kept open making the next acquisition faster
rgb : bool
return an RGB image if true, single channel grey scale otherwise
device : VideoCapture
an acquisition device, optional
Returns
-------
2d (single channel) or 3d (RGB) numpy array / image
"""
import cv2
if device is None:
if not hasattr(acquire, "video_source"):
acquire.video_source = cv2.VideoCapture(camera_index)
device = acquire.video_source
_, picture = device.read()
if picture is None:
return
if not keep_connection:
device.release()
del acquire.video_source
if rgb:
picture[:, :, 0], picture[:, :, 2] = picture[:, :, 2], picture[:, :, 0]
else:
from skimage.color import rgb2gray
picture = rgb2gray(picture)
return picture
def _extract_faces_tracked_from_video(video_folder: Path, bounding_boxes: Path,
face_images: Path) -> bool:
with open(str((bounding_boxes / video_folder.name).with_suffix(".json")),
"r") as f:
face_bb = json.load(f)
face_images = face_images / video_folder.with_suffix("").name
face_images.mkdir(exist_ok=True)
cap = VideoCapture(str(video_folder))
width = cap.get(cv2.CAP_PROP_FRAME_WIDTH)
height = cap.get(cv2.CAP_PROP_FRAME_HEIGHT)
tracked_bb, relative_bb = _face_bb_to_tracked_bb(face_bb,
image_size=(height,
width),
scale=1)
# extract all faces and save it
frame_num = 0
while cap.isOpened():
success, image = cap.read()
if not success:
break
face = tracked_bb[f"{frame_num:04d}"]
_extract_face(image, face, face_images, frame_num)
frame_num += 1
cap.release()
# save relative face positions as well
with open(face_images / "relative_bb.json", "w") as f:
json.dump(relative_bb, f)
with open(face_images / "tracked_bb.json", "w") as f:
json.dump(tracked_bb, f)
return True
class Video:
def __init__(self, path):
self._path = path
self._handler = VideoHandler(self)
def __enter__(self):
if exists(self._path):
self.cap = VideoCapture(self._path)
return self
else:
raise FileNotFoundError
def __exit__(self, exc_type, exc_val, exc_tb):
self.cap.release()
def detect(self, element):
elements = []
for i in tqdm(range(self.length)):
frame = self.frames.read(i)
contours = element.detect(frame)
if contours:
elements.append((i, contours))
return elements
def _detect(self, element):
elements = []
key_frame = self.frames.read(0)
contours = element.detect(key_frame)
for i in tqdm(range(self.length)):
frame = self.frames.read(i)
mse = frame.metrics.mse(key_frame)
if mse > 1500:
key_frame = frame
contours = element.detect(key_frame)
if contours:
elements.append((i, contours))
return elements
@property
def framerate(self):
return self.cap.get(5)
@property
def width(self):
return int(self.cap.get(3))
@property
def height(self):
return int(self.cap.get(4))
@property
def dimension(self):
return self.width, self.height
@property
def codec(self):
return unhexlify('%x' % int(self.cap.get(6)))[::-1].decode()
@property
def length(self):
return int(self.cap.get(7))
@property
def frames(self):
return self._handler.frames
@staticmethod
def create_image(image):
return Image(image)
def write(self, frames, path, codec=None, framerate=None, dimension=None):
# raise NotImplementedError
codec = codec if codec else self.codec
framerate = framerate if framerate else self.framerate
dimension = dimension if dimension else self.dimension
with Writer(path, codec, framerate, dimension) as vw:
vw.write(frames)
class CamShow(QMainWindow, Ui_Camera):
def __init__(self, parent=None): #ui部分
super(CamShow, self).__init__(parent)
self.setupUi(self)
self.Mix() #条和Box的值匹配
self.Btn() #按钮初始化
self.Var() #变量初始化
self.Func() #控件功能集合
self.Timer = QTimer() #计时器
self.Timer.timeout.connect(self.TimerOutFun) #计时器
def Mix(self): #条和Box的值匹配 #ui部分
self.RSld.valueChanged.connect(self.RBx.setValue)
self.RBx.valueChanged.connect(self.RSld.setValue)
self.GSld.valueChanged.connect(self.GBx.setValue)
self.GBx.valueChanged.connect(self.GSld.setValue)
self.BSld.valueChanged.connect(self.BBx.setValue)
self.BBx.valueChanged.connect(self.BSld.setValue)
self.BGSld.valueChanged.connect(self.BGBx.setValue)
self.BGBx.valueChanged.connect(self.BGSld.setValue)
self.ZYSld.valueChanged.connect(self.ZYBx.setValue)
self.ZYBx.valueChanged.connect(self.ZYSld.setValue)
self.LDSld.valueChanged.connect(self.LDBx.setValue)
self.LDBx.valueChanged.connect(self.LDSld.setValue)
self.DBSld.valueChanged.connect(self.DBBx.setValue)
self.DBBx.valueChanged.connect(self.DBSld.setValue)
def Btn(self): #按钮初始化 #ui部分
self.PrepCamera()
self.Stop.setEnabled(False)
self.Record.setEnabled(False)
self.Die.setEnabled(False)
self.RSld.setEnabled(False)
self.RBx.setEnabled(False)
self.GSld.setEnabled(False)
self.GBx.setEnabled(False)
self.BSld.setEnabled(False)
self.BBx.setEnabled(False)
self.BGSld.setEnabled(False)
self.BGBx.setEnabled(False)
self.ZYSld.setEnabled(False)
self.ZYBx.setEnabled(False)
self.LDSld.setEnabled(False)
self.LDBx.setEnabled(False)
self.DBSld.setEnabled(False)
self.DBBx.setEnabled(False)
self.quick.setEnabled(False)
self.Local.setEnabled(False)
self.Pic.setEnabled(False)
def PrepCamera(self): #准备一下照相机 #功能部分
for ID in range(5000):
self.camera = VideoCapture(ID)
success, frame = self.camera.read()
if success:
break
if not success:
msg = QMessageBox.warning(self,
u"Warning",
u"请检测相机与电脑是否连接正确",
buttons=QMessageBox.Ok,
defaultButton=QMessageBox.Ok)
return success
def PrepVideo(self): #准备一下检测视频
self.camera = VideoCapture(self.RecordPath)
success, frame = self.camera.read()
if success:
pass
if not success:
msg = QMessageBox.warning(self,
u"Warning",
u"文件不可读取,请重新选择路径",
buttons=QMessageBox.Ok,
defaultButton=QMessageBox.Ok)
return success
def PrepPicture(self):
success = imread(self.RecordPath)
if type(success) == type(None):
success = False
else:
success = True
if success:
pass
if not success:
msg = QMessageBox.warning(self,
u"Warning",
u"图片不可读取,请重新选择路径",
buttons=QMessageBox.Ok,
defaultButton=QMessageBox.Ok)
return success
def Var(self): #参数初始化 #ui部分
self.RecordFlag = 0
self.RecordPath = 'D:/'
self.LJTx.setText(self.RecordPath)
self.Image_num = 0
self.R = 1
self.G = 1
self.B = 1
self.BGSld.setValue(self.camera.get(15))
self.SetBG()
self.ZYSld.setValue(self.camera.get(14))
self.SetZY()
self.LDSld.setValue(self.camera.get(10))
self.SetLD()
self.DBSld.setValue(self.camera.get(11))
self.SetDB()
self.Info.clear()
self.temp = 0
self.count = 0
def Func(self): #控件功能合集 #ui部分
self.LJBut.clicked.connect(self.SetFilePath)
self.Start.clicked.connect(self.StartCamera)
self.Stop.clicked.connect(self.StopCamera)
self.Record.clicked.connect(self.RecordCamera)
self.Exit.clicked.connect(self.close)
self.Die.stateChanged.connect(self.setDie)
self.BGSld.valueChanged.connect(self.SetBG)
self.ZYSld.valueChanged.connect(self.SetZY)
self.LDSld.valueChanged.connect(self.SetLD)
self.DBSld.valueChanged.connect(self.SetDB)
self.RSld.valueChanged.connect(self.SetR)
self.GSld.valueChanged.connect(self.SetG)
self.BSld.valueChanged.connect(self.SetB)
self.Local.stateChanged.connect(self.LocalFun)
self.Pic.stateChanged.connect(self.PicFun)
def StartCamera(self): #界面按钮准备工作 #ui部分
self.Local.setEnabled(True)
self.Start.setEnabled(False)
self.Stop.setEnabled(True)
self.Record.setEnabled(True)
self.Die.setEnabled(True)
if self.Die.isChecked() == 0:
self.RSld.setEnabled(True)
self.RBx.setEnabled(True)
self.GSld.setEnabled(True)
self.GBx.setEnabled(True)
self.BSld.setEnabled(True)
self.BBx.setEnabled(True)
self.BGSld.setEnabled(True)
self.BGBx.setEnabled(True)
self.ZYSld.setEnabled(True)
self.ZYBx.setEnabled(True)
self.LDSld.setEnabled(True)
self.LDBx.setEnabled(True)
self.DBSld.setEnabled(True)
self.DBBx.setEnabled(True)
self.quick.setEnabled(True)
self.Pic.setEnabled(True)
self.Record.setText('录像')
self.Timer.start(1)
self.timelb = time.time()
def StopCamera(self): #暂停界面 #ui部分
if self.Stop.text() == '暂停':
self.Stop.setText('继续')
self.Record.setText('保存')
self.Timer.stop()
self.camera.release()
elif self.Stop.text() == '继续':
if self.Local.isChecked():
success = self.PrepVideo()
elif self.Pic.isChecked():
success = self.PrepPicture()
else:
success = self.PrepCamera()
if not success:
pass
else:
self.Stop.setText('暂停')
self.Record.setText('录像')
self.Timer.start(1)
def TimerOutFun(
self): #读取图像 #功能部分#功能部分#功能部分#功能部分#功能部分#功能部分#功能部分#功能部分#功能部分#功能部分
'''单帧图片功能'''
time_interval = self.quick.value()
zero = time.time()
sec = 1 #
if self.Pic.isChecked():
img = imread(self.RecordPath)
success = True
else:
success, img = self.camera.read() #读取图像！！！img为图像，如果要拿去加框框，可以在这里截胡
if success: #如果成功读取
self.Image = self.ColorAdjust(img) #调整图像参数（RGB或者遗像）
if self.Image_num % time_interval == 0:
result = inference_detector(model, self.Image)
self.temp = result
self.count = show_result(self.Image,
result,
CLASSES,
show=False,
out_file="~/0.jpg")
self.Image = imread("~/0.jpg")
#img1_array.append(img)
#imwrite("%d.jpg" % count, image)
# print(count)
elif self.Image_num != 1:
result = self.temp
self.count = show_result(self.Image,
result,
CLASSES,
show=False,
out_file="~/0.jpg")
self.Image = imread("~/0.jpg")
if self.count != 0 and self.Image_num % sec == 0:
#if 1==1 :
Text1 = '有%d名员工未佩戴安全帽' % self.count
self.Info_2.setHtml(
QCoreApplication.translate(
"Camera",
"<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0//EN\" \"http://www.w3.org/TR/REC-html40/strict.dtd\">\n"
"<html><head><meta name=\"qrichtext\" content=\"1\" /><style type=\"text/css\">\n"
"p, li { white-space: pre-wrap; }\n"
"</style></head><body style=\" font-family:\'微软雅黑\'; font-size:14pt; font-weight:600; font-style:normal;\">\n"
"<p align=\"center\" style=\"-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;\"><br /></p>\n"
"<p align=\"center\" style=\" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;\"><img src=\"./warning.jpg\" /></p>\n"
"<p align=\"center\" style=\" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;\"><span style=\" font-weight:72; color:#ff0000;\">%s</span></p></body></html>"
) % (Text1))
else:
Text1 = '正常'
self.Info_2.setHtml(
QCoreApplication.translate(
"Camera",
"<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0//EN\" \"http://www.w3.org/TR/REC-html40/strict.dtd\">\n"
"<html><head><meta name=\"qrichtext\" content=\"1\" /><style type=\"text/css\">\n"
"p, li { white-space: pre-wrap; }\n"
"</style></head><body style=\" font-family:\'微软雅黑\'; font-size:14pt; font-weight:600; font-style:normal;\">\n"
"<p align=\"center\" style=\"-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;\"><br /></p>\n"
"<p align=\"center\" style=\"-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;\"><br /></p>\n"
"<p align=\"center\" style=\" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;\"><span style=\" font-size:18pt;\">%s</span></p></body></html>"
) % Text1)
self.DispImg() #显示
finish = time.time()
self.Image_num += 1 #计算帧数
if self.RecordFlag: #开始录像
self.video_writer.write(self.Image) #录像存入
if self.Image_num % 10 == 9: #计算帧率
frame_rate = 10 / (time.time() - self.timelb)
Text1 = '延迟：' + str(
round(1000 * (finish - zero) / time_interval, 1)) + ' MS'
Text2 = '帧率：' + str(round(frame_rate, 1)) + ' FPS'
self.Info.setHtml(
QCoreApplication.translate(
"Camera",
"<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0//EN\" \"http://www.w3.org/TR/REC-html40/strict.dtd\">\n"
"<html><head><meta name=\"qrichtext\" content=\"1\" /><style type=\"text/css\">\n"
"p, li { white-space: pre-wrap; }\n"
"</style></head><body style=\" font-family:\'微软雅黑\'; font-size:12pt; font-weight:400; font-style:normal;\">\n"
"<p align=\"center\" style=\"-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;\"><br /></p>\n"
"<p align=\"center\" style=\"-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;\"><br /></p>\n"
"<p align=\"center\" style=\" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;\"><span style=\" font-size:14pt;\">%s</span></p>\n"
"<p align=\"center\" style=\" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;\"><span style=\" font-size:14pt;\">%s</span></p></body></html>"
) % (Text1, Text2))
self.timelb = time.time()
elif self.Local.isChecked: #无法读取图像
msg = QMessageBox.warning(self,
u"Warning",
u"视频已播放并检测完毕",
buttons=QMessageBox.Ok,
defaultButton=QMessageBox.Ok)
self.StopCamera()
else:
msg = QMessageBox.warning(self,
u"Warning",
u"请检测相机是否被其他应用占用",
buttons=QMessageBox.Ok,
defaultButton=QMessageBox.Ok)
self.StopCamera()
def DispImg(self): #功能部分#功能部分#功能部分#功能部分#功能部分#功能部分#功能部分#功能部分#功能部分#功能部分
#颜色调整
img = cvtColor(self.Image, COLOR_BGR2RGB)
#显示图像
a = QPixmap(array2qimage(img))
self.cam.setPixmap(a)
self.cam.show()
def setDie(self): #ui部分 灰度模式按钮
if self.Die.isChecked():
self.RSld.setEnabled(False)
self.RBx.setEnabled(False)
self.GSld.setEnabled(False)
self.GBx.setEnabled(False)
self.BSld.setEnabled(False)
self.BBx.setEnabled(False)
else:
self.RSld.setEnabled(True)
self.RBx.setEnabled(True)
self.GSld.setEnabled(True)
self.GBx.setEnabled(True)
self.BSld.setEnabled(True)
self.BBx.setEnabled(True)
def SetR(self): #ui部分 R
R = self.RSld.value()
self.R = R / 255
def SetG(self): #ui部分 G
G = self.GSld.value()
self.G = G / 255
def SetB(self): #ui部分 B
B = self.BSld.value()
self.B = B / 255
def ColorAdjust(self, img): #调整颜色
try:
B = img[:, :, 0]
G = img[:, :, 1]
R = img[:, :, 2]
B = B * self.B
G = G * self.G
R = R * self.R
img1 = img
img1[:, :, 0] = B
img1[:, :, 1] = G
img1[:, :, 2] = R
if self.Die.isChecked():
img1 = cvtColor(img1, COLOR_BGR2GRAY)
return img1
except Exception as e:
self.label.setText(str(e))
def SetBG(self): #调整曝光
try:
exposure_time_toset = self.BGSld.value()
self.camera.set(22, exposure_time_toset)
self.camera.set(10, exposure_time_toset)
except Exception as e:
self.label.setText(e)
def SetZY(self): #调整增益
gain_toset = self.ZYSld.value()
try:
self.camera.set(22, gain_toset)
except Exception as e:
self.label.setText(e)
def SetLD(self): #调整亮度
brightness_toset = self.LDSld.value()
try:
self.camera.set(10, brightness_toset)
except Exception as e:
self.label.setText(e)
def SetDB(self): #调整对比度
contrast_toset = self.DBSld.value()
try:
self.camera.set(11, contrast_toset)
except Exception as e:
self.label.setText(e)
def SetFilePath(self): #选择保存路径
if self.Local.isChecked() or self.Pic.isChecked():
dirname = QFileDialog.getOpenFileName(self, "浏览", '.')[0]
else:
dirname = QFileDialog.getExistingDirectory(self, "浏览", '.')
if dirname:
self.LJTx.setText(dirname)
if self.Local.isChecked() or self.Pic.isChecked():
self.RecordPath = dirname
else:
self.RecordPath = dirname + '/'
def LocalFun(self):
if self.Local.isChecked():
self.Pic.setEnabled(False)
self.BGSld.setEnabled(False)
self.BGBx.setEnabled(False)
self.ZYSld.setEnabled(False)
self.ZYBx.setEnabled(False)
self.LDSld.setEnabled(False)
self.LDBx.setEnabled(False)
self.DBSld.setEnabled(False)
self.DBBx.setEnabled(False)
self.LJ.setText('检测路径')
self.StopCamera()
msg = QMessageBox.information(self,
u"Tip",
u"请选择文件路径,单击继续以开始检测",
buttons=QMessageBox.Ok,
defaultButton=QMessageBox.Ok)
else:
self.LJ.setText('保存路径')
self.Pic.setEnabled(True)
self.BGSld.setEnabled(True)
self.BGBx.setEnabled(True)
self.ZYSld.setEnabled(True)
self.ZYBx.setEnabled(True)
self.LDSld.setEnabled(True)
self.LDBx.setEnabled(True)
self.DBSld.setEnabled(True)
self.DBBx.setEnabled(True)
self.StopCamera()
def PicFun(self):
if self.Pic.isChecked():
self.Local.setEnabled(False)
self.BGSld.setEnabled(False)
self.BGBx.setEnabled(False)
self.ZYSld.setEnabled(False)
self.ZYBx.setEnabled(False)
self.LDSld.setEnabled(False)
self.LDBx.setEnabled(False)
self.DBSld.setEnabled(False)
self.DBBx.setEnabled(False)
self.LJ.setText('检测路径')
self.StopCamera()
msg = QMessageBox.information(self,
u"Tip",
u"请选择图片路径,单击继续以开始检测",
buttons=QMessageBox.Ok,
defaultButton=QMessageBox.Ok)
else:
self.LJ.setText('保存路径')
self.Local.setEnabled(True)
self.BGSld.setEnabled(True)
self.BGBx.setEnabled(True)
self.ZYSld.setEnabled(True)
self.ZYBx.setEnabled(True)
self.LDSld.setEnabled(True)
self.LDBx.setEnabled(True)
self.DBSld.setEnabled(True)
self.DBBx.setEnabled(True)
self.StopCamera()
def RecordCamera(self): #录像功能
tag = self.Record.text()
if tag == '保存':
try:
image_name = self.RecordPath + 'image' + time.strftime(
'%Y%m%d%H%M%S', time.localtime(time.time())) + '.jpg'
self.label.setText(image_name)
imwrite(image_name, self.Image)
except Exception as e:
self.label.setText(e)
elif tag == '录像':
self.Record.setText('停止')
video_name = self.RecordPath + 'video' + time.strftime(
'%Y%m%d%H%M%S', time.localtime(time.time())) + '.avi'
fps = 24 / self.quick.value()
size = (self.Image.shape[1], self.Image.shape[0])
fourcc = VideoWriter_fourcc('M', 'J', 'P', 'G')
self.video_writer = VideoWriter(video_name, fourcc,
self.camera.get(5), size)
self.RecordFlag = 1
self.label.setAlignment(Qt.AlignCenter)
self.label.setText('录像中...')
self.Stop.setEnabled(False)
self.Exit.setEnabled(False)
elif tag == '停止':
self.Record.setText('录像')
self.video_writer.release()
self.RecordFlag = 0
self.label.setText('录像已保存')
self.Stop.setEnabled(True)
self.Exit.setEnabled(True)
def closeEvent(self, event): #关闭事件
ok = QPushButton()
cacel = QPushButton()
msg = QMessageBox(QMessageBox.Warning, u"关闭", u"是否关闭！")
msg.addButton(ok, QMessageBox.ActionRole)
msg.addButton(cacel, QMessageBox.RejectRole)
ok.setText(u'确定')
cacel.setText(u'取消')
# msg.setDetailedText('sdfsdff')
if msg.exec_() == QMessageBox.RejectRole:
event.ignore()
else:
# self.socket_client.send_command(self.socket_client.current_user_command)
if self.camera.isOpened():
self.camera.release()
if self.Timer.isActive():
self.Timer.stop()
event.accept()
class Player:
writer: VideoWriter
tracker: Tracker
def __init__(self, input_filename: str, output_filename: str, codec: str,
window_name: str) -> None:
# OPTIONS
self.input_filename = input_filename
self.output_filename = output_filename
self.window_name = window_name
self.state = PlayerState()
self.hud = HUD(self.state)
self.writer = None
if self.output_filename:
codec = VideoWriter_fourcc(*(codec or 'XVID'))
self.writer = VideoWriter(output_filename, codec, 30, (1280, 720))
self.capture = VideoCapture(input_filename)
if not self.capture.isOpened():
raise Exception("The capture could not be opened")
ok, self.frame = self.capture.read()
if not ok:
raise Exception("The capture could not be read")
self.state.target_fps = self.state.original_fps = self.capture.get(
CAP_PROP_FPS)
imshow(self.window_name, self.frame)
self.selector = Selector(self.window_name)
self.selector.on_selecting = self.on_selecting
self.selector.on_selected = self.on_selected
self.label_uppercase = False
self.meter = TickMeter()
def update(self):
if not self.state.paused:
ok, self.frame = self.capture.read()
if not ok:
return self._close()
for tracking_object in self.state.tracking_objects:
tracking_object.update(self.frame)
if self.writer:
self.writer.write(self.hud.render_output(self.frame))
imshow(self.window_name, self.hud.render(self.frame))
self.meter.stop()
self.state.fps = 1 / (self.meter.getTimeSec() or 1)
wait_ms = max(
1, 1000.0 / self.state.target_fps - self.meter.getTimeMilli())
self.meter.reset()
self.meter.start()
key = waitKey(int(wait_ms)) & 0xff
if key == 255:
pass
elif len(
self.state.tracking_objects
) > 0 and self.state.tracking_objects[-1].label_typing_in_progress:
print(key)
if key == 27: # ESC
self.state.tracking_objects[-1].label = ""
self.state.tracking_objects[
-1].label_typing_in_progress = False
elif key == 8:
if len(self.state.tracking_objects[-1].label) > 0:
self.state.tracking_objects[
-1].label = self.state.tracking_objects[-1].label[:-1]
elif key == 13: # ENTER
self.state.tracking_objects[
-1].label_typing_in_progress = False
elif key == 229: # CAPS LOCK
self.label_uppercase = not self.label_uppercase
elif key in range(32, 127):
self.state.tracking_objects[-1].label += chr(
key) if not self.label_uppercase else chr(key).upper()
elif key == 27: # ESC
return self._close()
elif key == 32: # SPACE
self.state.paused = not self.state.paused
elif key == 81: # LARROW
self.state.target_fps = self.state.target_fps / 2
elif key == 83: # RARROW
self.state.target_fps = self.state.target_fps * 2
def on_selecting(self, rect):
self.state.selection = rect
def on_selected(self, rect):
if rect[2] != 0 or rect[3] != 0:
self.state.tracking_objects += [TrackingObject(self.frame, rect)]
self.state.selection = None
def _close(self):
self.capture.release()
if self.writer:
self.writer.release()
return -1
class Streamer(Player):
def __init__(self, grabber, source=0):
Player.__init__(self)
self._flip_state = False
self._source = source
self._video_cap = VideoCapture(source)
self._frame_counter = 0
self.grab = grabber
self._thread = None
self._paused = False
def set_grabber(self, grabber):
self.grab = grabber
def get_fps(self):
return self._video_cap.get(CAP_PROP_FPS)
def pause_toggle(self):
self._paused = not self._paused
def set_source(self, source):
self._video_cap.release()
self._frame_counter = 0
self._source = source
self._video_cap.open(source)
def get_source(self):
return self._source
def get_shape(self):
if self._video_cap.isOpened():
w = int(self._video_cap.get(WIDTH_PROPERTY))
h = int(self._video_cap.get(HEIGHT_PROPERTY))
shape = (w, h)
else:
self._video_cap.open(self._source)
w = int(self._video_cap.get(WIDTH_PROPERTY))
h = int(self._video_cap.get(HEIGHT_PROPERTY))
shape = (w, h)
self._video_cap.release()
return shape
def flip_toggle(self):
self._flip_state = not self._flip_state
def get_property(self, PROP):
return self._video_cap.get(PROP)
def set_property(self, PROP, value):
self._video_cap.set(PROP, value)
def run(self):
from time import sleep, clock
delay = 1. / self._speed if self._speed != 0 \
else 1. / self.get_fps() if self._source != 0 else None
total_frames = self._video_cap.get(CAP_PROP_FRAME_COUNT)
while self._signal.value():
if not self._paused:
time_start = clock()
if self._source != 0:
if self._frame_counter == total_frames:
self.set_source(self._source)
_, frame = self._video_cap.read()
if frame is None:
continue
self._frame_counter += 1
self.grab(flip(frame, 1) if self._flip_state else frame)
if delay is not None:
sleep(max(delay + time_start - clock(), 0))
def __play__(self):
self._video_cap.open(self._source)
self._thread = FastThread(func=self.run, parent=self)
self._thread.start()
def __stop__(self):
self._video_cap.release()
def __close__(self):
self._signal.set(False)
self._video_cap.release()
if self._thread is not None:
self._thread.exit(0)
