MATLAB 视频转图像算法

%function [filename,pathname,fileindex]  by vincent  [filename,pathname,fileindex]= uigetfile('B*.avi','C:\Users\sunboy\Desktop\file\B','video.avi','Multiselect','on'); %'video.avi' if ischar(filename) %只有选择了文件才进行以下计算 video=mmreader([pathname filename]); %%General Settings: %Duration 时间 %Name 视频名称 %Path 路径 %Tag = %Type = mmreader %UserData = [] %%Video Settings: %BitsPerPixel=24 %FrameRate 视频采集速率 %Height 高度 %NumberOfFrames 总帧数 %VideoFormat 图像模式 %Width = 宽度 LEN=video.NumberOfFrames; %获得视频长度 dir=strcat(pathname,strrep(filename,'.avi',''),'\pic'); mkdir(dir); fn=strrep(filename,'.avi',''); for k=1:LEN-1 %若read 到len，常会报错如下???MATLAB:read:readTimedOut，read 到len-1 就好了 frame=rgb2gray(read(video,k)); if k<10 imwrite(frame,strcat(dir,'\',fn,'-avi-000',int2str(k),'.bmp'),'bmp');%把每帧图像存入硬盘 elseif k>=10 && k<100 imwrite(frame,strcat(dir,'\',fn,'-avi-00',int2str(k),'.bmp'),'bmp');%把每帧图像存入硬盘 elseif k>=100 && k<1000 imwrite(frame,strcat(dir,'\',fn,'-avi-0',int2str(k),'.bmp'),'bmp');%把每帧图像存入硬盘 elseif k>=1000 && k<10000 imwrite(frame,strcat(dir,'\',fn,'-avi-',int2str(k),'.bmp'),'bmp');%把每帧图像存入硬盘 end end elseif iscell(filename) navi=length(filename); for n=1:navi video=mmreader([pathname filename{n}]); %%General Settings: %Duration 时间 %Name 视频名称 %Path 路径 %Tag = %Type = mmreader %UserData = [] %%Video Settings: %BitsPerPixel=24 %FrameRate 视频采集速率 %Height 高度 %NumberOfFrames 总帧数 %VideoFormat 图像模式 %Width = 宽度 LEN=video.NumberOfFrames; %获得视频长度 dir=strcat(pathname,strrep(filename{n},'.avi',''),'\pic'); mkdir(dir); fn=strrep(filename{n},'.avi',''); for k=1:LEN-1 %若read 到len，常会报错如下???MATLAB:read:readTimedOut，独到len-1 就好了 frame=rgb2gray(read(video,k)); if k<10 imwrite(frame,strcat(dir,'\',fn,'-avi-000',int2str(k),'.bmp'),'bmp');%把每帧图像存入硬盘 elseif k>=10 && k<100 imwrite(frame,strcat(dir,'\',fn,'-avi-00',int2str(k),'.bmp'),'bmp');%把每帧图像存入硬盘 elseif k>=100 && k<1000 imwrite(frame,strcat(dir,'\',fn,'-avi-0',int2str(k),'.bmp'),'bmp');%把每帧图像存入硬盘 elseif k>=1000 && k<10000 imwrite(frame,strcat(dir,'\',fn,'-avi-',int2str(k),'.bmp'),'bmp');%把每帧图像存入硬盘 end end disp(strcat(num2str(n),'/',num2str(navi),' :"',filename{n},'" Finished!',datestr(now,13))); end else return end msgbox('所有帧提取完毕,已写入磁盘！','提示');