python image process with multithreading problem

Question

i have a smart door lock project with using mimic passwords and i can take mimic with camera i can detect fingers, smile, eyebrows etc. but all in one script. I want to use class things for it. I construct class build but i have to use multithreading because i have to run more than one method for detect all mimics in one cam. With my code, it opens 2 cam one by one, first opened cam and detect fingers and when i close it open another cam and detect face. how can i make it with one cam?

camera.py https://www.pythonmorsels.com/p/33trh/

FaceLandMarks.py https://www.pythonmorsels.com/p/28jmh/

HandLandMarks.py https://www.pythonmorsels.com/p/33ffw/

HandTrackingModule.py https://www.pythonmorsels.com/p/39jw2/

test.py https://www.pythonmorsels.com/p/3a2e5/

Answer 1

The simplest is to create camera outside classes and send it to classes as parameter

captureMode = cv2.VideoCapture(0)

FaceLandMarks(captureMode).run()
HandLandMarks(captureMode).run()
# etc.

captureMode.release()
cv2.destroyAllWindows()

class LandMarksFace:  # without `Camera
    
    def __init__(self, camera):

        self.camera = camera

        # ... code ...

    def run(self):

        # ... code ...

        success, img = self.camera.read()

        # ... code ...

---

And if you really need to use class Camera then create it in __init__ and set instace to all classes

class Camera():

    def __init__(self):
        self.camera = cv2.VideoCapture(0)

    def getCamera(self):
        return self.camera

cam = Camera()

FaceLandMarks(cam).run()
HandLandMarks(cam).run()
# etc.

cam.getCamera().release()
cv2.destroyAllWindows()

class LandMarksFace:  # without `Camera
    
    def __init__(self, camera):

        self.camera = camera

        # ... code ...

    def run(self):

        # ... code ...

        success, img = self.camera.getCamera().read()

        # ... code ...