# 需要导入模块: import cv [as 别名]

# 或者: from cv import GetSize [as 别名]

def FPV_thread():

global camera_index

global capture

global WINDOW_NAME

global latest_frame

global FPV_thread_stop

global overlay_message # shared with application return results

global face_position # shared with application return results

FPV_init()

cv.NamedWindow(WINDOW_NAME, cv.CV_WINDOW_NORMAL)

cv.MoveWindow(WINDOW_NAME, 0, 0)

width_scale = 1.0

height_scale = 1.0

while True:

frame = cv.QueryFrame(capture)

cv.Flip(frame, None, 1)

#copy to buffer

frame_lock.acquire()

original_imagesize = (0,0)

resized_imagesize = (0,0)

if not latest_frame:

latest_frame = cv.CreateImage((640, 480), frame.depth, frame.nChannels)

original_imagesize = cv.GetSize(frame)

resized_imagesize = cv.GetSize(latest_frame)

width_scale = original_imagesize[0]*1.0/resized_imagesize[0]

height_scale = original_imagesize[1]*1.0/resized_imagesize[1]

cv.Resize(frame, latest_frame)

frame_lock.release()

#Display Result

text_start_point = (10, 50)

cv.PutText(frame, overlay_message, text_start_point, font, cv.Scalar(255,255,255))

cv.Rectangle(frame, text_start_point, (original_imagesize[0], 100), cv.Scalar(0,0,0), thickness=cv.CV_FILLED)

if face_position[0] > 0.0:

point1 = (int(face_position[0]*width_scale), int(face_position[1]*height_scale))

point2 = (int((face_position[0] + face_position[2])*width_scale), \

int((face_position[1]+face_position[3])*height_scale))

cv.Rectangle(frame, point1, point2, \

cv.Scalar(255, 255, 255), thickness=2)

cv.ShowImage(WINDOW_NAME, frame)

cv.ResizeWindow(WINDOW_NAME, 200, 100)

cv.NamedWindow(WINDOW_NAME, cv.CV_WINDOW_NORMAL);

cv.SetWindowProperty(WINDOW_NAME, 0, cv.CV_WINDOW_FULLSCREEN);

c = cv.WaitKey(10)

if c == ord('q'):

break

print "[INFO] FPV Thread is finished"

FPV_thread_stop = True

FPV_close()