Finding peak with two nulls around in a 1d plot

How can we find the presence of a peak (global maxima) with two nulls (or crossing lower threshold) on each side of the peak in a 1d plot.

And is there a way to find the width of the peak at a particular threshold level

[KALYAN ACHARJYA]

Have you try here

https://in.mathworks.com/help/signal/ref/findpeaks.html

[Image Analyst]

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