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ch02-安装OpenCV/最简单-使用pip安装opencv-python和opencv-contrib-python/README.md

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- python -c "import cv2;print(cv2.__version__,cv2.__doc__,cv2.__file__)"
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- python -c "import cv2;print(help(cv2.CascadeClassifier))"
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- 运行,2个特性
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- 鼠标指向某个像素,提示栏会显示当前坐标和RGB数据
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- 工具栏有很多实用的功能,可惜不能显示图标
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- ![opencv-contrib-python](opencv-contrib-python.jpeg)
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##
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软件包包含预编译的OpenCV二进制文件和Python绑定。
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这可以为Python提供超快速(通常<10秒)OpenCV安装。

ch04-图片/4.1_imread_imshow.py

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# cv2.resizeWindow('image', 200, 200) # 不起作用?
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cv2.imshow('image', img)#窗口会自动调整为图像大小
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# 按任意键退出
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# 在窗口上按任意键退出
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cv2.waitKey(delay=0)#返回按键的 ASCII 码值
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cv2.destroyAllWindows()

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