Python安装OpenCV--基本使用

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第一步：安装numpy
pip install numpy

第二步：安装opencv-contrib-python
pip install opencv-contrib-python
添加灰色滤镜

import cv2
import numpy as np


def show_view():
    cap = cv2.VideoCapture(0)
    ret = cap.set(3, 320)  # 设置捕获窗口大小
    ret = cap.set(4, 240)
    while(cap.isOpened()):

        ret, frame = cap.read()

        gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)  # 彩色图像用BGR2RGB

        cv2.imshow('frame', gray)
        if cv2.waitKey(1) & 0xFF == ord('q'):
            break

    cap.release()
    cv2.destroyAllWindows()


if __name__ == '__main__':
    show_view()

原图像输出：

import cv2
import numpy as np


def show_view():
    cap = cv2.VideoCapture(0)
    ret = cap.set(3, 320)  # 设置捕获窗口大小
    ret = cap.set(4, 240)
    while(cap.isOpened()):

        ret, frame = cap.read()

        # gray = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)  # 彩色图像用BGR2RGB

        cv2.imshow('frame', frame)
        if cv2.waitKey(1) & 0xFF == ord('q'):
            break

    cap.release()
    cv2.destroyAllWindows()


if __name__ == '__main__':
    show_view()

学习网址：https://docs.opencv.org/master/