def display_single_image(img, name="Image", x_pos=0, y_pos=0, delay=0):
"""
Displays an image on screen.
Position can be chosen, and time on screen too.
Delay corresponds to the display time, in milliseconds.
If delay =0, the Image stays on screen until user interaction.
----
Ex:
img = cv.LoadImage("../data/tippy.jpg", cv.CV_LOAD_IMAGE_GRAYSCALE)
display_single_image(img, "My Tippy", 0, 0, 100)
"""
#TODO: Still not implemented!
if not isinstance(name, str):
raise TypeError("(%s) Name :String expected!" %
(sys._getframe().f_code.co_name))
if (not isinstance(x_pos, int)) \
or (not isinstance(x_pos, int)) \
or (not isinstance(x_pos, int)) :
raise TypeError("(%s) Int expected!" %
(sys._getframe().f_code.co_name))
cv.StartWindowThread()
cv.NamedWindow(name)
cv.MoveWindow(name, x_pos, y_pos)
cv.ShowImage(name, img)
cv.WaitKey(delay)
cv.DestroyWindow(name)
def __init__(self, mode=1, name="w1", capture=1):
if mode == 1:
cv.StartWindowThread()
cv.NamedWindow(name, cv.CV_WINDOW_AUTOSIZE)
self.camera_index = 0
self.name = name
if capture == 1:
self.capture = cv.CaptureFromCAM(self.camera_index)
def __init__(self, stereo, image, blob):
global font
rospy.Subscriber(blob, Blobs, callbackBlobs)
rospy.Subscriber(stereo + "/left/" + image, Image, callbackImage)
print "Subscribing to:"
print "\t* " + blob
print "\t* " + stereo + "/left/" + image
cv.StartWindowThread()
cv.NamedWindow(windowName)
font = cv.InitFont(cv.CV_FONT_HERSHEY_SIMPLEX, 0.20, 1, thickness=2)
def mouse_point(img, name="Mouse Points", mode="S"):
"""
Displays input image and waits for user click on a point of the image.
For each click, the (x, y) coordinates are retrieved.
Two modes are possible:
-Single :
The function exits automatically on first click.
Returns a list containing 1 (x,y) tuple.
-Multiple :
All clicks are saved. The function exists when the user types on keyboard
Returns containing (x,y) tuples.
---
Ex:
img = cv.LoadImage("../data/tippy.jpg", cv.CV_LOAD_IMAGE_GRAYSCALE)
mouse_points(img, name="mouse points", mode="S")
"""
if not isinstance(name, str):
raise TypeError("(%s) Name :String expected!" % (sys._getframe().f_code.co_name))
if not isinstance(mode, str):
raise TypeError("(%s) Mode :String expected!" % (sys._getframe().f_code.co_name))
global _mouse_pos
cv.StartWindowThread()
cv.NamedWindow(name, cv.CV_WINDOW_AUTOSIZE)
cv.SetMouseCallback(name, _on_mouse)
try :
cv.ShowImage(name, img)
except TypeError:
raise TypeError("(%s) img : IplImage expected!" % (sys._getframe().f_code.co_name))
if mode == "S":
_single_point()
elif mode == "M":
_multiple_points()
else:
raise ValueError("(%s) Mode can be either S (single) or M (multiple)" % (sys._getframe().f_code.co_name))
cv.DestroyWindow(name)
return _mouse_pos
def show_image(img, window_name='img', wait=False):
roscv.StartWindowThread()
roscv.NamedWindow(window_name)
roscv.ShowImage(window_name, img)
if wait: roscv.WaitKey()
#Note: data should be of type sensor_msgs.msg.Image
#rospy.loginfo(rospy.get_name()+"I heard some data from camera")
global global_ros_image
global_ros_image = data
def listener():
rospy.init_node('my_image_listener', anonymous=True)
rospy.Subscriber("wide_stereo/right/image_rect_color", msgImage,
imageCallback)
rospy.spin()
if __name__ == '__main__':
cv.NamedWindow('view')
cv.StartWindowThread()
rospy.init_node('my_image_listener', anonymous=True)
a = rospy.Subscriber("wide_stereo/right/image_rect_color", msgImage,
imageCallback)
print 'sleeping now' #spin cycle. Similar to "spin_once" ?
while (not global_ros_image):
rospy.sleep(.1)
if rospy.is_shutdown():
print '\nforcing an exit'
break
print 'waking and exiting now'
if not rospy.is_shutdown():
a.unregister()