Batch conversion from mat file to pcd file

2022 7 18
1 个回答
回答已采纳
更新时间：2022 7 19
5 次查看（30 天）

0 个投票

Hello. I have around 1800 mat file in the discontinous order like 1,2,4,7,8, etc. I already found a code to load all the mat file but I can not do the batch conversion from mat to pcd file. Can anyone help me with this? Thanks in advance!

请先登录，再回答此问题。

 采纳的回答

Walter Roberson
Walter Roberson 2022-7-18

0 个投票

inputdir = 'Appropriate mat folder name goes here';
outputdir = 'Appropriate pcd folder name goes here';
if ~exist(inputdir, 'dir'); error('Input directory %s does not exist', inputdir); end
if ~exist(outputdir, 'dir'); mkdir(outputdir); end
dinfo = dir( fullfile(inputdir, '*.mat') );
filenames = fullfile({dinfo.folder}, {dinfo.name});
for K = 1 : length(filenames)
thisfile = filenames{K};
[~, basename, ~] = fileparts(thisfile);
outname = fullfile(outputdir, [basename '.pcd']);
Convert_mat_to_pcd(thisfile, outname);
end
Given appropriate code Convert_mat_to_pcd that uses the first parameter as the name of the input .mat file and uses the second parameter as the (fully qualified) output file name.

7 个评论
显示 5更早的评论 隐藏 5更早的评论

Vu Minh
Vu Minh 2022-7-19
Thank you for your suggestion. However, when I replace the inputdir and outputdir with my two appropriate directory, the code ran into an error stating that Unrecognized function or variable 'Convert_mat_to_pcd'. This means I have to define the function Convert_mat_to_pcd before running the code right. Sorry for this because Im a very beginner.
Walter Roberson
Walter Roberson 2022-7-19
I have no idea how to convert your mat files to pcd files. I do not the variables you have stored, or which portion of them need to be extracted, or which computations need to be done to create something that could potentially be written to a pcd file. I have no idea what the pcd file format is, and I do not know if any routines are available to write to pcd files.
The difficulty you outlined was in how to loop through the input files. The implication was that given any one mat file that you already know how to convert it to pcd. If so then write that logic into your own function Convert_mat_to_pcd
Walter Roberson
Walter Roberson 2022-7-19
https://www.mathworks.com/help/vision/ref/pcwrite.html can write pcd files
Vu Minh
Vu Minh 2022-7-19
Yes I can convert 1 by 1 mat file to pcd as the code below:
A = importdata('save_220523_103750_pointcloud.mat');
xyzPoints = A.Location;
ptCloud = pointCloud(xyzPoints);
pcwrite(ptCloud,'save_220523_103750_pointcloud.pcd');
Walter Roberson
Walter Roberson 2022-7-19
编辑：Walter Roberson 2022-7-19
function Convert_mat_to_pcd(matname, pcdname)
A = load(matname, 'Location');
xyzPoints = A.Location;
ptCloud = pointCloud(xyzPoints);
pcwrite(ptCloud, pcdname );
end
Vu Minh
Vu Minh 2022-7-19
Thank you sir for your valueable advice. I got this now. Anyway the function for loading mat file should be "importdata" instead of "load".
Walter Roberson
Walter Roberson 2022-7-19
No, the function for loading mat files should be load(). importdata() has a lot of overhead and can return unexpected results.

请先登录，再进行评论。

更多回答（0 个）

类别

在 帮助中心 和 File Exchange 中查找有关 Read, Write, and Modify Image 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by