AutoCrop center

autocrop_center.py

import numpy as np
import cv2

def center_rectangle(frame):
    h,w,d = frame.shape
    x1,y1 = h//4, w//4
    x2,y2 = h-x1, w-y1
    rr = cv2.rectangle(frame,(y1,x1),(y2,x2),(0,255,0),3)
    crop = frame[x1:x2, y1:y2]
    return rr

def crop_center(frame):
    h,w,d = frame.shape
    x1,y1 = h//4, w//4
    x2,y2 = h-x1, w-y1
    crop = frame[x1:x2, y1:y2]
    return crop

cap = cv2.VideoCapture(0)

while(True):
    ret, frame = cap.read()
    rr = center_rectangle(frame)
    crop = crop_center(frame)
    cv2.imshow('frame',rr);
    cv2.imshow('crop area',crop)
    
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

# When everything done, release the capture
cap.release()
cv2.destroyAllWindows()