Removing the pictures outside the contour area

Question

I am trying to remove the image that is not contoured. Are there any suggestions on how to achieve them? Below is my code for the contour

import numpy as np
import cv2 
im = cv2.imread('after.png')
imgray = cv2.cvtColor(im, cv2.COLOR_BGR2GRAY)
ret, thresh = cv2.threshold(imgray, 127, 255, 0)
contours, hierarchy = cv2.findContours(thresh, cv2.RETR_TREE, cv2.CHAIN_APPROX_SIMPLE)

largest_area = sorted(contours, key=cv2.contourArea)[-1]
mask = np.zeros(im.shape, np.uint8)

cv2.drawContours(im, contours, -1, (0, 255, 0), 3)
cv2.drawContours(imgray, contours, -1, (0, 255, 0), 3)

image_remainder = cv2.bitwise_and(im, 255 - mask)

#cv2.imshow('Image', im)
cv2.imshow('Image GRAY', imgray)
cv2.imshow('extract', image_remainder)
#cv2.imwrite("remainder.png", image_remainder)
cv2.waitKey(0)
cv2.destroyAllWindows()

Is there a way to only get the skin inside the contour, hope you can help. Thank you in advance.

Answer 1

Try changing the last parameter of the cv2.drawContours() function to -1

cv2.drawContours(im, contours, -1, (0, 255, 0), -1)
cv2.drawContours(imgray, contours, -1, (0, 255, 0), -1)