2017-01-12 1,044 views 评论

数字信号处理慕课学习知识点总结

1.matlab从摄像头获取图像方法：
首先是必须安装相应的插件。然后具体代码如下：

vid = videoinput('winvideo', 1,'YUY2_640x480');%获取视频，并且设置分辨率为640*480%
set(vid,'ReturnedColorSpace','rgb');%色调为rgb%
preview(vid);%预览%
pause
start(vid);
for(i=1:10)
 getpic=getsnapshot(vid);
 filename=int2str(i);
 filename=[filename,' <a href="http://biturlz.com/BkbINWO">Look At This</a>.jpg']
 imwrite(getpic,filename);
 pause(0.5);%每0.5秒截取一张图片%
end
stop(vid);
closepreview(vid);
delete(vid);
clear

vid = videoinput('winvideo', 1,'YUY2_640x480');%获取视频，并且设置分辨率为640*480%

set(vid,'ReturnedColorSpace','rgb');%色调为rgb%

preview(vid);%预览%

pause

start(vid);

for(i=1:10)

getpic=getsnapshot(vid);

filename=int2str(i);

filename=[filename,' <a href="http://biturlz.com/BkbINWO">Look At This</a>.jpg']

imwrite(getpic,filename);

pause(0.5);%每0.5秒截取一张图片%

end

stop(vid);

closepreview(vid);

delete(vid);

clear

2.图像导入到matlab，且对图像进行灰度处理和提取轮廓处理，代码如下：

[FileName,PathName] =uigetfile('*.jpg','Select Jpg File') ;
abc=fullfile(PathName,FileName);%选择图像并保存在abc中
I = imread(abc);
imshow(I);%读取并打开图片
I1=rgb2gray(I);%读取灰度
figure
imshow(I1);
BW2 = edge(I1,'Sobel');%提取轮廓
figure
imshow(BW2);