Opencv 马赛克和毛玻璃效果与图片融合的实现
1.马赛克效果
马赛克的基本原理就是,用某一个区域的某一个像素点替代这个区域所有的像素点,从而导致图片出现模糊的效果,如下:
import cv2 # 马赛克效果 img = cv2.imread(filename='../anqila21.jpg',flags=1) imgInfo = img.shape height = imgInfo[0] width = imgInfo[1] flag = 2 # 系数,系数越小,马赛克的效果越不明显 for m in range(26,height): for n in range(140,880): if m%flag==0 and n%flag==0: for i in range(0,flag): for j in range(0,flag): (b,g,r) = img[m,n] img[i+m,j+n] = (b,g,r) cv2.imshow('dst',img) cv2.waitKey(0)
2. 毛玻璃效果
import cv2 import numpy as np import random # 毛玻璃效果 img = cv2.imread(filename='../anqila21.jpg',flags=1) imgInfo = img.shape height = imgInfo[0] width = imgInfo[1] dst = np.zeros((height,width,3),np.uint8) for i in range(height-8): for j in range(width-8): index = int(random.random()*8) # 生成0-8之间的随机数(不包括8) dst[i, j] = img[i+index,j+index] cv2.imshow('dst',dst) cv2.waitKey(0)
3. 图片的融合
就是将两张图片融合到一张图片上,即可看到第一张图片的效果,也可以看到第二张图片的效果。
import cv2 img_1 = cv2.imread(filename='../anqila21.jpg',flags=1) img_2 = cv2.imread(filename='../huanghe.jpg',flags=1) imgInfo = img_1.shape height = imgInfo[0] width = imgInfo[1] # roi roi = 0.5 dst = cv2.addWeighted(img_1,roi,img_2,(1-roi),0) cv2.imshow('dst',dst) cv2.waitKey(0)
算法实现
import cv2 import numpy as np img_1 = cv2.imread(filename='../anqila21.jpg',flags=1) img_2 = cv2.imread(filename='../huanghe.jpg',flags=1) imgInfo = img_1.shape height = imgInfo[0] width = imgInfo[1] # roi roi = 0.5 dst = np.zeros((height,width,3),np.uint8) for i in range(height): for j in range(width): (b1,g1,r1) = img_1[i,j] (b2,g2,r2) = img_2[i,j] dst[i,j] = (int(b1*roi+b2*(1-roi)),int(g1*roi+g2*(1-roi)),int(r1*roi+r2*(1-roi))) cv2.imshow('dst',dst) cv2.waitKey(0)
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