Python_Opencv简单例子

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

##特征点
    img = cv.imread("F:/IMG/b.jpg")
    gray= cv.cvtColor(img,cv.COLOR_BGR2GRAY)
    sift = cv.xfeatures2d.SIFT_create()
    kp = sift.detect(gray,None)
    img=cv.drawKeypoints(gray,kp,img)
    # cv.imwrite('sift_keypoints.jpg',img)
#特征点画圈圈
    img=cv.drawKeypoints(gray,kp,img,flags=cv.DRAW_MATCHES_FLAGS_DRAW_RICH_KEYPOINTS)
    # cv.imwrite('sift_keypoints.jpg',img)
    cv.imshow("123",img)
    cv.waitKey(0)
    sift = cv.xfeatures2d.SIFT_create()
    kp, des = sift.detectAndCompute(gray,None)

类似美颜相机

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

img = cv.imread("F:/IMG/b.jpg")

dst = cv.fastNlMeansDenoisingColored(img,None,10,10,7,21) plt.subplot(121),plt.imshow(img) plt.subplot(122),plt.imshow(dst) plt.show() cv.imwrite('sift_keypoints.jpg',dst)