python中怎么调用摄像头显示图像-创新互联
这篇文章将为大家详细讲解有关python中怎么调用摄像头显示图像,文章内容质量较高,因此小编分享给大家做个参考,希望大家阅读完这篇文章后对相关知识有一定的了解。
成都创新互联公司专注于企业营销型网站建设、网站重做改版、乐安网站定制设计、自适应品牌网站建设、H5开发、商城建设、集团公司官网建设、成都外贸网站建设、高端网站制作、响应式网页设计等建站业务,价格优惠性价比高,为乐安等各大城市提供网站开发制作服务。如下所示:
import cv2 import numpy as np bins = np.arange(256).reshape(256,1) def hist_curve(im): h = np.zeros((300,256,3)) if len(im.shape) == 2: color = [(255,255,255)] elif im.shape[2] == 3: color = [ (255,0,0),(0,255,0),(0,0,255) ] for ch, col in enumerate(color): hist_item = cv2.calcHist([im],[ch],None,[256],[0,256]) cv2.normalize(hist_item,hist_item,0,255,cv2.NORM_MINMAX) hist=np.int32(np.around(hist_item)) pts = np.int32(np.column_stack((bins,hist))) cv2.polylines(h,[pts],False,col) y=np.flipud(h) return y def hist_lines(im): h = np.zeros((300,256,3)) if len(im.shape)!=2: print "hist_lines applicable only for grayscale images" #print "so converting image to grayscale for representation" im = cv2.cvtColor(im,cv2.COLOR_BGR2GRAY) hist_item = cv2.calcHist([im],[0],None,[256],[0,256]) cv2.normalize(hist_item,hist_item,0,255,cv2.NORM_MINMAX) hist=np.int32(np.around(hist_item)) for x,y in enumerate(hist): cv2.line(h,(x,0),(x,y),(255,255,255)) y = np.flipud(h) return y if __name__ == '__main__': import sys if len(sys.argv)>1: im = cv2.imread(sys.argv[1]) else : im = cv2.imread('../cpp/lena.jpg') print "usage : python hist.py" gray = cv2.cvtColor(im,cv2.COLOR_BGR2GRAY) print ''' Histogram plotting \n Keymap :\n a - show histogram for color image in curve mode \n b - show histogram in bin mode \n c - show equalized histogram (always in bin mode) \n d - show histogram for color image in curve mode \n e - show histogram for a normalized image in curve mode \n Esc - exit \n ''' cv2.imshow('image',im) while True: k = cv2.waitKey(0)&0xFF if k == ord('a'): curve = hist_curve(im) cv2.imshow('histogram',curve) cv2.imshow('image',im) print 'a' elif k == ord('b'): print 'b' lines = hist_lines(im) cv2.imshow('histogram',lines) cv2.imshow('image',gray) elif k == ord('c'): print 'c' equ = cv2.equalizeHist(gray) lines = hist_lines(equ) cv2.imshow('histogram',lines) cv2.imshow('image',equ) elif k == ord('d'): print 'd' curve = hist_curve(gray) cv2.imshow('histogram',curve) cv2.imshow('image',gray) elif k == ord('e'): print 'e' norm = cv2.normalize(gray,alpha = 0,beta = 255,norm_type = cv2.NORM_MINMAX) lines = hist_lines(norm) cv2.imshow('histogram',lines) cv2.imshow('image',norm) elif k == 27: print 'ESC' cv2.destroyAllWindows() break cv2.destroyAllWindows()
关于python中怎么调用摄像头显示图像就分享到这里了,希望以上内容可以对大家有一定的帮助,可以学到更多知识。如果觉得文章不错,可以把它分享出去让更多的人看到。
另外有需要云服务器可以了解下创新互联scvps.cn,海内外云服务器15元起步,三天无理由+7*72小时售后在线,公司持有idc许可证,提供“云服务器、裸金属服务器、高防服务器、香港服务器、美国服务器、虚拟主机、免备案服务器”等云主机租用服务以及企业上云的综合解决方案,具有“安全稳定、简单易用、服务可用性高、性价比高”等特点与优势,专为企业上云打造定制,能够满足用户丰富、多元化的应用场景需求。
网页名称:python中怎么调用摄像头显示图像-创新互联
文章路径:http://ybzwz.com/article/cccgop.html