matlab公共函数之保存YUV数据
时间: 2023-07-31 17:06:20 浏览: 50
保存YUV数据是视频处理中常用的操作之一,MATLAB提供了许多函数来实现这个功能。下面是一个简单的MATLAB公共函数,可以将一个YUV数据保存为一个YUV文件。
```matlab
function save_yuv(yuv_file, Y, U, V, width, height)
% Save YUV data to a YUV file
% Inputs:
% yuv_file: the path of the YUV file to save
% Y: the Y component of the YUV data (a matrix of size height x width)
% U: the U component of the YUV data (a matrix of size height/2 x width/2)
% V: the V component of the YUV data (a matrix of size height/2 x width/2)
% width: the width of the video frame
% height: the height of the video frame
% Open the YUV file for writing
fid = fopen(yuv_file, 'w');
% Write the Y component
fwrite(fid, Y', 'uint8');
% Write the U component (downsampled by a factor of 2 in both dimensions)
U_d = imresize(U, 0.5, 'bilinear');
fwrite(fid, U_d', 'uint8');
% Write the V component (downsampled by a factor of 2 in both dimensions)
V_d = imresize(V, 0.5, 'bilinear');
fwrite(fid, V_d', 'uint8');
% Close the YUV file
fclose(fid);
end
```
使用该函数,可以将YUV数据写入到一个YUV文件中。例如:
```matlab
% Generate some sample YUV data
width = 640;
height = 480;
Y = uint8(rand(height, width)*255);
U = uint8(rand(height/2, width/2)*255);
V = uint8(rand(height/2, width/2)*255);
% Save the YUV data to a file
save_yuv('test.yuv', Y, U, V, width, height);
```
这个函数可以方便地将YUV数据保存到文件中,并且支持不同分辨率的视频。
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