zoukankan      html  css  js  c++  java
  • 1图片视频文件操作基础

    视频/摄像头处理

    #1打开视屏文件
    #打开视屏文件
    def extrace_object_demo():
        capture = cv.VideoCapture("D:/vcprojects/images/video_006.mp4")
        while(True):
            ret, frame = capture.read()
            if ret == False:#读到视频结尾返回false
                break;
            hsv = cv.cvtColor(frame, cv.COLOR_BGR2HSV)
            lower_hsv = np.array([37, 43, 46])
            upper_hsv = np.array([77, 255, 255])
            mask = cv.inRange(hsv, lowerb=lower_hsv, upperb=upper_hsv)
            dst = cv.bitwise_and(frame, frame, mask=mask)
            cv.imshow("video", frame)
            cv.imshow("mask", dst)
            c = cv.waitKey(40)
            if c == 27:
                break

    2#调用摄像头获得像素数据

    import cv2 as cv
    import numpy as np
    
    #视频
    
    def video_demo():
        capture = cv.VideoCapture(0)#0是代表摄像头,也可以改成视频文件路径
        while(True):
            ret, frame = capture.read()#ret是返回值,frame代表视频每一帧
            frame = cv.flip(frame, 1)#镜像变化
            cv.imshow("video", frame)#显示视频的每一帧
            c = cv.waitKey(50)
            if c == 27:
                break
    
    #获取像素等数据
    def get_image_info(image):
        print(type(image))#类型
        print(image.shape)#高,宽,通道数
        print(image.size)
        print(image.dtype)
        pixel_data = np.array(image)#获取像素
        print(pixel_data)
    
    
    print("--------- Hello Python ---------")
    src = cv.imread("C:/Users/wml/Desktop/wml/ym.jpg")
    cv.namedWindow("input image", cv.WINDOW_AUTOSIZE)
    cv.imshow("input image", src)
    video_demo()
    # get_image_info(src)
    gray = cv.cvtColor(src, cv.COLOR_BGR2GRAY)#获取灰度图
    cv.imwrite("C:/Users/wml/Desktop/wml/ym_gray.jpg", gray)#保存图片
    cv.waitKey(0)
    
    cv.destroyAllWindows()
    
    
  • 相关阅读:
    Neko's loop HDU-6444(网络赛1007)
    Parameters
    SETLOCAL
    RD / RMDIR Command
    devenv 命令用法
    Cannot determine the location of the VS Common Tools folder.
    'DEVENV' is not recognized as an internal or external command,
    How to change Visual Studio default environment setting
    error signing assembly unknown error
    What is the Xcopy Command?:
  • 原文地址:https://www.cnblogs.com/wml2018/p/12181647.html
Copyright © 2011-2022 走看看