在 opencv 中捕获并保存图像

Question

import cv2
import face_recognition


cap = cv2.VideoCapture(0)


face_locations = []

while True:

    ret, frame = cap.read()


    rgb_frame = frame[:, :, ::-1]


    face_locations = face_recognition.face_locations(rgb_frame)


    for top, right, bottom, left in face_locations:



        cv2.circle(frame,(int((left + right) / 2), top),15,(0, 0, 255), 2)
    cv2.circle(frame,(350 ,  150),5,(0, 255, 0), 1)



    cv2.imshow('Video', frame)


    if cv2.waitKey(25) == 13:
        break


cap.release()
cv2.destroyAllWindows()

Screenshot of the result:

Goal:

I need the save the image only if the green circle is inside the red circle and the saved image should not contain the circles.

If the green circle is not inside the red circle, it must not save the image.

Answer 1

Taking the answer to this question as the basis: Check if circle inside circle

x1, y1 -> Position of red circle

x2, y2 -> Position of green circle

c1 -> radius of red circle

c2 -> radius of green circle

import math

And after importing then you need to change the following

#frame without circles
frameToSave = frame

#add circles to frame in live feed
cv2.circle(frame,(int((left + right) / 2), top),15,(0, 0, 255), 2)
cv2.circle(frame,(350 ,  150),5,(0, 255, 0), 1)

x1 = int((left + right) / 2)
y1 = top
c1 = 15

x2 = 350
y2 = 150
c2 = 5

d = math.sqrt((x2-x1)*(x2-x1) + (y2-y1)*(y2-y1))

if c1 > ( d + c2 ):
    print("green circle inside red circle")
    cv2.imwrite(filename,frameToSave)
else:
    print("green circle not inside or not fully inside red circle")
    cv2.imwrite(filename,frameToSave)

Edited a bit to fulfill the goal in the comments (live feed with circles, saved image without circles)