Python 实现摄像头功能

最新推荐文章于 2024-08-18 10:28:41 发布

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最新推荐文章于 2024-08-18 10:28:41 发布 · 5.3k 阅读

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#Python #摄像头 #Pygame

该博客介绍了如何利用Python的VideoCapture库和Pygame模块实现从摄像头抓取图像并显示的功能。通过示例代码展示了如何初始化摄像头、保存快照、加载图像到Pygame窗口并进行显示。同时，提到了Pygame的一些关键函数如pygame.init()、pygame.display.set_caption()、pygame.display.set_mode()等，以及它们的作用和使用方法。

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正确的程序如下所示：

#! /usr/bin/env python

# -*- coding: utf-8 -*-

from VideoCapture import Device

import time

import sys,pygame

pygame.init()

size = width,height = 620,485

speed = [2,2]

black = 0,0,0

pygame.display.set_caption('视频窗口')

screen = pygame.display.set_mode(size)

#抓去频率，抓去一次

sleep_time_long = 0.1

#初始化摄像头

cam = Device(devnum=0,showVideoWindow=0)

while 1:

#抓图

cam.saveSnapshot('test.jpg',timestamp=3,boldfont=1,quality=75)

#加载图像

image = pygame.image.load('test.jpg')

#传送画面

screen.blit(image,speed)

#显示图像

pygame.display.flip()

#休眠一下，等待一分钟

time.sleep(sleep_time_long)

以下为笔者所写程序：

#! /usr/bin/env python

# -*- coding: utf-8 -*-

from VideoCapture import DEVIDE

import time

import sys,pygame

[A1]

size = width,height = 600,485

speed = [2,2[A2] ]

black[A3] = (0,0,0)

pygame.display.set_Caption('视频窗口')

pygame[A4] .set_mode(size)

sleep_time_long=0.1

cam = DEVICE(devnum=0,VideoWindow=0)

while true:

cam.saveSnapshot('test.jpg',timestamp=3,boldfont=1,quality=75)

image = pygame.iamge.load('test.jpg')

screen.blit[A5] ()

pygame.display.flip()

time.sleep(sleep_time_long)

解释及延伸：

pygame.init

initializeall imported pygame modules
pygame.init():return (numpass, numfail)

Initialize all imported Pygamemodules. No exceptions will be raised if a module fails, but the total numberif successful and failed inits will be returned as a tuple. You can alwaysinitialize individual modules manually, but pygame.init is aconvenient way to get everything started. The init() functions forindividual modules will raise exceptions when they fail.

You may want to initalise thedifferent modules seperately to speed up your program or to not use things yourgame does not.

Itis safe to call this init() more than once: repeated calls willhave no effect. This is true even if you have pygame.quit –uninitializeall pygame modules– all the modules.

pygame.display.set_caption

set the current window caption
pygame.display.set_caption(title,icontitle=None): return None

If the display has a window title, thisfunction will change the name on the window. Some systems support an alternateshorter title to be used for minimized displays.