myPath= 'C:\Users\Prienka\Documents\MATLAB\frames';
a =dir(fullfile(myPath,'*.png'));
a(1).name
a(end).name
Im1 = imread(a(1).name);
Im2 = imread(a(end).name);
Im1 = rgb2gray(Im1);
Im2 = rgb2gray(Im2);
hn1 = imhist(Im1)./numel(Im1); %initial pixel postion
hn2 = imhist(Im2)./numel(Im2); %final pixel position
d = sum(sqrt(hn2-hn1).^2);
d=sprintf('%.0f',d);
obj = VideoReader('traffic.mp4')
x=obj.FrameRate
velocity=d/x;
velocity=sprintf('%.0f',velocity)
if velocity >= 63
msgbox('SPEED EXCEEDED' )
end
this is my code for calculating the velocity of a vehicle in a vedio... the problem is i have extracted all the movie frames in a different folder named "frames"... here whenever m trying to run the code its showing a error like this "Error using imread (line 350) File "001.png" does not exist.
这是我在视频中计算车辆速度的代码…问题是，我已经在一个名为“frame”的不同文件夹中提取了所有的电影帧。在这里，每当m试图运行代码时，它的显示错误就像这样“使用imread(行350)文件”001。png”并不存在。
Error in pikz (line 5) Im1 = imread(a(1).name);" my file name is pikz.m
错误在pikz(第5行)Im1 = imread(a(1).name);“我的文件名是pikz.m。
1 个解决方案
#1
0
In your current working directory (pwd) the file does not exist. Dir only returns relative path like '001.png'. You have to use fullfile to get the absolute path like 'C:\Users\Prienka\Documents\MATLAB\frames\001.png' to pass it to imread
在当前工作目录(pwd)中，文件不存在。Dir只返回相对路径，如“001.png”。你必须使用fullfile来获得绝对路径，如“C:\ \ \ \Prienka\Documents\MATLAB\frame \001”。png将它传递给imread。
#1
0
In your current working directory (pwd) the file does not exist. Dir only returns relative path like '001.png'. You have to use fullfile to get the absolute path like 'C:\Users\Prienka\Documents\MATLAB\frames\001.png' to pass it to imread
在当前工作目录(pwd)中，文件不存在。Dir只返回相对路径，如“001.png”。你必须使用fullfile来获得绝对路径，如“C:\ \ \ \Prienka\Documents\MATLAB\frame \001”。png将它传递给imread。