masking.py

import cv2
import numpy as np 
dispW=640
dispH=480
flip=2
img1= np.zeros((480,640,1),np.uint8)
img1[0:480, 0:320]= [255]
img2= np.zeros((480,640,1), np.uint8)
img2[190:290, 270:370]= 255
bitAnd= cv2.bitwise_and(img1,img2)
bitOr= cv2.bitwise_or(img1,img2)
bitXor= cv2.bitwise_xor(img1,img2)
camSet='nvarguscamerasrc !  video/x-raw(memory:NVMM), width=3264, height=2464, format=NV12, framerate=21/1 ! nvvidconv flip-method='+str(flip)+' ! video/x-raw, width='+str(dispW)+', height='+str(dispH)+', format=BGRx ! videoconvert ! video/x-raw, format=BGR ! appsink'
cam=cv2.VideoCapture(camSet)
while True:
    ret, frame=cam.read()
    cv2.imshow('img1', img1)
    cv2.imshow('img2', img2)
    cv2.imshow('bitAnd', bitAnd)
    cv2.imshow('bitOr', bitOr)
    cv2.imshow('bitXor', bitXor)
    cv2.imshow('orgCam', frame)
    frame= cv2.bitwise_and(frame,frame, mask=bitAnd)
    cv2.imshow('nanoCam', frame)
    if cv2.waitKey(1) == ord('q'):
        break
cam.release()
cv2.destroyAllWindows()