Python3 can I replace waitKey() with an input using curses?

python3

asked 2020-06-22 15:56:57 -0600

NikosOpenCV
3 ●1

updated 2020-06-23 12:11:41 -0600

supra56

943 ●9 ●6

Python3... Hello.I have a program and a part of it is to open a camera with opencv. Another part of program is to give inputs using curses(curses do NOT wait/stop the other parts of program until user give an input ) So, when I open a camera AND then give an input the program sticks a little bit and this is very very bad. I think the problem is to --> cv2.waitkey(1) (Part of camera) ,because(maybe) waits for user input (I don't know)-> if(cv2.waitkey(1) == ord('q'):

Can I replace cv2.waitkey(1) with the following ???

input = curses.initscr()

curses.noecho()

input.nodelay(1) # set getch() non-blocking

I don't want to wait for a key,because the other parts of program sticks.

Thanks!!

edit retag flag offensive close merge delete

Comments

do you understand the difference between a console based an a gui based program ?

berak ( 2020-06-22 16:37:56 -0600 )edit

I asked if I can replace waitkey() function with an input that don't need to wait.

NikosOpenCV ( 2020-06-23 01:47:41 -0600 )edit

One mode comment: waitKey works in the window's event loop, while curses only works in the terminal (command line).

So if the image window has focus, you have to use waitKey, but if the terminal has focus, you need getch to read a keystroke.

kbarni ( 2020-06-25 04:35:49 -0600 )edit

add a comment

Comments

Can I delete the if statement in the following code?? When I delete it and then run the program ,it shows a white video screen:

import cv2

cap = cv2.VideoCapture(0);              
while(cap.isOpened()):                   
    ret , frame = cap.read()              

    cv2.imshow('I see you !!!' , frame)   
    if cv2.waitKey(1) == ord('q'):       
        break
cap.release()                           
cv2.destroyAllWindows()

NikosOpenCV ( 2020-06-23 07:10:42 -0600 )edit

When I delete it and then run the program ,it shows a white video screen.

yea, nothing will get updated, ever (the white color is arbitrary)

Can I delete the if statement in the following code?

again, no.

berak ( 2020-06-23 07:41:18 -0600 )edit

add a comment

Python3 can I replace waitKey() with an input using curses?

Comments

1 answer

Comments

Links

Question Tools

Stats

Related questions

Python3 can I replace waitKey() with an input using curses? edit

Comments

1 answer

Comments

Links

Question Tools

Stats

Related questions

Python3 can I replace waitKey() with an input using curses?