Continuous Wavelet Transform (CWT) of 1-D Signals using Python and MATLAB

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Hello viewers, in this video, Continuous Wavelet Transform (CWT) and its applications are discussed. A brief theory of wavelet and CWT is presented. Also, Python and MATLAB implementation is shown to compute continuous wavelet transform coefficients in the form beautiful Scalograms. These Scalograms are very important for study of CWT of 1D signals, highlighting their properties such as frequency break, time discontinuity, burst etc. These Scalograms can also be used as image input to some deep neural network for 1D signal classification.
This video has following contents:
* Theory of Continuous Wavelet Transform (CWT).
* CWT Applications.
* CWT of 1D signals using Python (Using PyWavelet)
* Python Code for CWT of simple signal and signal with discontinuity.
* CWT of 1D signals using MATLAB. (Older and newer functions support)
* MATLAB Code for CWT of simple signal and signal with discontinuity.
Important Links:
1. Introduction to wavelet transform and its applications: • Introduction to Wavele...
2. Wavelet Transform Analysis of 1D signals using Python: ​ • Wavelet Transform Anal...
PyWavelet Documentation:
pywavelets.rea...

[@andrerangel7654]

Thank you for the class! I'm working with wavelet right now and you helped me a lot!

[@vector8310]

Your presentation was well calibrated and it addressed in a timely manner every question a first-time viewer is likely to have. Model pedagogy.

[@KwabenaAsiedu]

Thank you so much Sir. this has been so helpful

[@__-1234]

Thank you for doing... it really helps

[@aras9319]

Thank you for the usefull contents. Why did you select "scales" value between 1 and 31? How we can determine it?

[@Deepsim]

Great job!

[@holyqurantranslation2053]

Thank you

[@mahdieht-v4u]

Thank you for providing such a helpful tutorial. Is it possible to download the written codes?

[@exploringtechnologies9]

Pause the screen, take snapshot and get printouts. You will have code ;)

[@xiaohongyu3517]

Thank you so much for the explain. I want to ask if there is any function in python to convert image to rgb that ind2rgb function did in matlab? I tried cv2.cvtColor function in python, but the image is still in gray color. How should I do to save the image in jet(320)color style?

[@code2compass]

in the first example what does the graph tell use about frequencies?

[@arash4232]

Hi, which alterations in the output may happen by selection of other values for FS?
Thanks

[@riekesyochranizaef2067]

Hallo, How about scalogram in signal processing?

[@roma4665]

Thank you for the useful class. Please, can you download pdf of this class?

[@berniechung962]

Sir, can you please make a video about ECG filter using "conv" ? I am struggling with how to write the code.

[@HungNguyen-bk1jn]

Can you explain about: "Hybrid Approach for Scalogram" in A Lightweight CNN Model for Detecting Respiratory Diseases from Lung Auscultation Sounds using EMD-CWT-based Hybrid Scalogram papper?

[@exploringtechnologies9]

Send the link of paper

[@HungNguyen-bk1jn]

"A Lightweight CNN Model for Detecting Respiratory Diseases from Lung Auscultation Sounds using EMW-CWT- bases Hybrid Scalogram". Hope you can explain about "Hybrid Approach for Scalogram" in this research.

[@rohitv1310]

I am not able to get the plots. It shows me
Error using cwt
Expected input to be a vector.
Error in wavelet_analysis (line 15)
cwt(x,"amor",seconds(1/Fs)); % 'morse'(default), 'amor', 'bump'
Please help me solve this.

[@exploringtechnologies9]

Check your input in workspace. It should be 1D array.

[@tsehayenegash8394]

How to plot a real data rather than a function in matlab by using CWT? if you upload before plese inform me its importan to me

[@abdelhakimsouidi9360]

If there is no frequencies breaks , how to process the signal

[@exploringtechnologies9]

you mean feature extraction?

[@sarthakpapney3125]

Sir, I want to decompose a signal into a sequence of Ricker (Mexican Hat) wavelets of different dominant frequencies.
Please please help me how to achieve this in python
Thank you Sir

[@exploringtechnologies9]

watch my video on "wavelet transform in Python".

[@sarthakpapney3125]

@@exploringtechnologies9 sir there are so many videos of yours on "wavelet transform in python"
Sir which one to see?

[@manivasaganm4849]

can you provide matlab code for fuzzy c means clustering for image segmentation to an image sir.

[@exploringtechnologies9]

Will try for that.