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#importing required libraries | |
import numpy as np | |
import cv2 | |
import matplotlib.pyplot as plt | |
#reading the image | |
image = cv2.imread('coins.jpg') | |
#converting image to grayscale format | |
gray = cv2.cvtColor(image,cv2.COLOR_BGR2GRAY) | |
#apply thresholding | |
ret,thresh = cv2.threshold(gray,0,255,cv2.THRESH_BINARY_INV+cv2.THRESH_OTSU) | |
#get a kernel | |
kernel = np.ones((3,3),np.uint8) | |
opening = cv2.morphologyEx(thresh,cv2.MORPH_OPEN,kernel,iterations = 2) | |
#extract the background from image | |
sure_bg = cv2.dilate(opening,kernel,iterations = 3) | |
dist_transform = cv2.distanceTransform(opening,cv2.DIST_L2,5) | |
ret,sure_fg = cv2.threshold(dist_transform,0.7*dist_transform.max(),255,0) | |
sure_fg = np.uint8(sure_fg) | |
unknown = cv2.subtract(sure_bg,sure_bg) | |
ret,markers = cv2.connectedComponents(sure_fg) | |
markers = markers+1 | |
markers[unknown==255] = 0 | |
markers = cv2.watershed(image,markers) | |
image[markers==-1] = [255,0,0] | |
plt.imshow(sure_fg) | |
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