opencv-python use

opencv_python uses

1. Gui features in opencv:

　　1. Read in the image:

　　　　The cv2.imread() function reads in the image. Its parameters are:

　　　　　　(1) The path to this image.

　　　　　　(2) Tell the function how to read the image:　　　　

　　　　　　　　cv2.IMREAD_COLOR: Read in a color image. But the transparency of the image is ignored and can be represented by 1.

　　　　　　　　cv2.IMREAD_GRAYSCALE: Read the image in grayscale mode, which can be represented by 0.

　　　　　　　　cv2.IMREAD_UNCHANGED: read in an image, and include the alpha channel of the image, I haven't tried out how to represent this.

　　　　　　

1 import numpy as np
2 import cv2
3 img=cv2.imread('F:\python\opencv\pic\kongfu.jpg',0)

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　　2. Display image:

　　　　cv2.imshow() displays the image. The first parameter is the name of the window, followed by the obtained image parameter.

　　3. Save the image:

　　　　Use the function cv2.imwrite() to save an image. The first parameter is a filename, followed by the image you want to save.

　　Summary code: