thomas-shi corners

import numpy as np
import cv2
from matplotlib import pyplot as plt

img = cv2.imread('fish/2014_aq_unprocessed 001.jpg')
gray = cv2.cvtColor(img,cv2.COLOR_BGR2GRAY)

corners = cv2.goodFeaturesToTrack(gray,25,0.01,10)
corners = np.int0(corners)

for i in corners:
    x,y = i.ravel()
    cv2.circle(img,(x,y),3,255,-1)

#plt.imshow(img),plt.show()
cv2.namedWindow('corners')
cv2.imshow('corners', img)
cv2.waitKey(0)