OpenCV Python实践
安装
Python
sudo apt install python3
sudo apt install python3-pip
sudo pip3 install --upgrade pip
OpenCV
sudo pip3 install opencv-python
sudo pip3 install opencv-contrib-python
图像
读取图像
import cv2
img_file = 'python-logo@2x.png'
img = cv2.imread(img_file)
获取图像大小
width = img.shape[1]
height = img.shape[0]
显示图像并等待按任意键退出
import cv2
img_file = 'python-logo@2x.png'
img = cv2.imread(img_file)
cv2.imshow('', img)
cv2.waitKey(0)
宽高缩小一倍 比例 import cv2 img_file = 'python-logo@2x.png' img = cv2.imread(img_file) img = cv2.resize(img, None, fx=0.5, fy=0.5) cv2.
