How to interpret spectogram?

2016 1 12
3 个回答
更新时间：2016 1 12
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I'm using spectrogram to plot time vs frequency representation of STFT signal? Basically How to detect peaks in spectrogram?

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回答（3 个）

Stalin Samuel
Stalin Samuel 2016-1-12

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priyankah katkar
priyankah katkar 2016-1-12
Stalin Thanks for reply. but my intention is to figure out maximum peak value from spectrogram? How can I do it? findpeaks() function gives peak values and its location. I want maximum peak magnitude.
Image Analyst
Image Analyst 2016-1-12
Try imregionalmax().

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Star Strider
Star Strider 2016-1-12

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The findpeaks function will not work with spectrogram, since it only works with vectors. You have to threshold the absolute value of the spectrogram function. See this thread for an example.
Image Analyst
Image Analyst 2016-1-12

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Looks like you'll have to use image analysis. Threshold the image. Might be beneficial to do some noise reduction first.

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