Store spectrogram with image data format in the MATLAB workspace

2022 1 4
2 个回答
回答已采纳
更新时间：2022 1 4
2 次查看（30 天）

0 个投票

Hi.
I want to analyze spectrograms of multiple audio files in a folder.
Audio files share the word "SPTGRM" in their names.
Audio files are stereo-type and I will take one channel data.
I saved data in the "AudioData" and also saved spectrogram data of these audio files.
I want to store spectrogram image in the cell with image data format (like [512 512 3]).
However, spectrograms are saved in "complex double" matrix like the figure below.
How can I get image data format?
Address = 'C:\Users\KOH\Desktop\MATLABcode\Soundsample';
Directory = dir(fullfile(Address,'SPTGRM*.wav'));
windowSize = 256;
windowOverlap = [];
freqRange = 1000:20000;
for i = 1:numel(Directory)
F = fullfile(Address,Directory(i).name);
[y,Fs] = audioread(F);
endtime = numel(y)/(2*Fs);
t = 1/Fs:1/Fs:endtime;
AudioData{i}=y(:,1);
Spectrogram{i}=spectrogram(AudioData{i}, windowSize, windowOverlap, freqRange, Fs, 'yaxis');
end

请先登录，再回答此问题。

 采纳的回答

Star Strider
Star Strider 2022-1-4

0 个投票

I would use the saveas function on the created figure to save it to whatever format is desired (and supported).

更多回答（1 个）

yanqi liu
yanqi liu 2022-1-4

0 个投票

Address = 'C:\Users\KOH\Desktop\MATLABcode\Soundsample';
Directory = dir(fullfile(Address,'SPTGRM*.wav'));
windowSize = 256;
windowOverlap = [];
freqRange = 1000:20000;
for i = 1:numel(Directory)
F = fullfile(Address,Directory(i).name);
[y,Fs] = audioread(F);
endtime = numel(y)/(2*Fs);
t = 1/Fs:1/Fs:endtime;
AudioData{i}=y(:,1);
data=spectrogram(AudioData{i}, windowSize, windowOverlap, freqRange, Fs, 'yaxis');
Spectrogram{i} = im2uint8(mat2gray(abs(data)));
end

类别

在 帮助中心 和 File Exchange 中查找有关 Get Started with MATLAB 的更多信息

产品

版本

R2019b

标签

Community Treasure Hunt

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

Start Hunting!

Translated by