1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
|
cv = require 'opencv'
# First we create a new VideoCapture object to get
# video from the camera (0 for default camera)
camera = new cv.VideoCapture(1)
# we create a window to display the Video frames
namedWindow = new cv.NamedWindow('Video',1)
# We set an interval to retrieve frames from the
# video source and we get the intervalId so we can
# stop the program from the video feed window.
intervalId = setInterval(()->
# camera.read allows us to retrieve the current
# frame to be displayed in the video window.
camera.read((err, im) ->
# We can check for errors and even break the
# program execution if an error is detected here.
console.log "The err ==>#{ err }" if err
# There is no need to display the image width or Height
# but I leave this here in case anyone needs to check them.
#console.log("Width: #{im.width()}")
#console.log("height: #{im.height()}")
# We use the previously created namedWindow to display the
# video feed frame, we need to check the image is already
# available and has a width and height greater than 0,
# otherwise namedWindow.show() will fail if any of those is 0.
namedWindow.show(im) if im.width() > 0 and im.height() > 0
# Finally we get the key pressed on the window to terminate
# execution of the program.
res = namedWindow.blockingWaitKey(0, 20)
console.log("KEYPRESSED => #{ res } ")
# In this case I terminate the program if any key is pressed.
if res >= 0 then clearInterval(intervalId)
)
, 500)
|
