Open .spf2
显示 更早的评论
Hello
I am trying to open a .spf2 file with matlab,but am having trouble. How can I do this?
Thank you Sam
回答（2 个）
Walter Roberson
2016-10-24
0 个投票
MATLAB does not offer any built-in support for .spf2 files, and there do not appear to be any File Exchange contributions for them.
What are the files? Are they to do with DNS tables? Are they to do with Still Picture Interchange File Format ?
Damiano Genovese
2018-12-13
0 个投票
Hi, I also have the same trouble. I'd like to read spectra saved as spf2 files.
spf2 files are the binary files of spectra saved from Thorlabs software for their spectrometers.
I attach an example of spf2 file in the zip folder, if anyone could take a look...
This is what the say in their manual (not sure it can be of any help):
Spectrum File Formats
The Thorlabs OSA software uses a variety of file formats in order to record measurement results.
*.spf2: This is the internal file format to save and load spectrum files from one or more traces. The file header consists of information about the used spectrometer, it's s/n, acquisition settings and trace properties
4 个评论
Walter Roberson
2018-12-13
I do not seem to be finding any information about the internal file format. If we had the .csv of the same file it might be possible to figure out where the data starts.
Damiano Genovese
2018-12-14
Dear Walter, thank you so much for your kind help. Attached is the same spectrum saved as spf2 and csv. Hope it can help.
Walter Roberson
2018-12-17
%experimental code
filename = '1.spf2';
fid = fopen(filename);
fseek(fid, 524, 'bof');
Length = fread(fid, 1, 'uint32'); %file stores little-endian
fseek(fid, -Length*4*2,'eof'); %4 bytes per entry, 2 columns
data = reshape( fread(fid, '*single'), [], 2); %file stores little-endian
fclose(fid);
I cannot promise that the length will definitely be at offset 524 in the file.
Damiano Genovese
2018-12-17
Thank you, it's working well for my datasets!
类别
在 帮助中心 和 File Exchange 中查找有关 Audio Processing Algorithm Design 的更多信息
2016-10-24
2018-12-17
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
