Exploring Technologies
Exploring Technologies
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Evolution of Laplace Transform and Z-Transform from Fourier Transform.
@exploringtechnologies9
#fouriertransform #laplacetransform #ztransform
Please visit, @www.exptech.co.in/ for more information and downloads.
Also follow the Facebook page:
@ DrAjayKrVerma/?view_public_for=109209970903585
Hello viewers. In this video, the evolution of Laplace transform, and Z-transform from Fourier transform is explained. It is explained how the problem of non-convergence of Fourier for some signals is overcome by Laplace and Z-transform for continuous time and discrete time signals respectively.
This lecture includes following points.
* Fourier Transform review (CTFT and DTFT).
* Problem with Fourier Transform.
* Birth of Laplace Transform.
* Birth of Z-Transform.
มุมมอง: 165

วีดีโอ

Texture Classification using Wavelet Scattering Transform (with MATLAB Code)
มุมมอง 4505 หลายเดือนก่อน
@exploringtechnologies9 #wavelet #matlab #mathworks #matlab_projects #matlab_assignments #phd #mtechprojects #deeplearning #projects #ai #machinelearning #artificialintelligence #matlabcode #research #signalprocessing #imageprocessingpython Please visit, @www.exptech.co.in/ for more information and downloads. Also follow the Facebook page: @ DrAjayKrVerma/?view_public_for=1092099709...
Wavelet Scattering Transform (WST) for Signals and Images (With MATLAB Code)
มุมมอง 1.2K8 หลายเดือนก่อน
@exploringtechnologies9 #wavelet #imageprocessing #matlab #signalprocessing Please visit, @www.exptech.co.in/ for more information and downloads. Also follow the Facebook page: @ DrAjayKrVerma/?view_public_for=109209970903585 Hello Viewers. In this video, Wavele Scattering Transform (WST) is explained for both 1D and 2D signals. This lectures explains that how WST coefficients can b...
Comparison of Threshold Estimation Methods for Wavelet based Denoising of Audio Signals.
มุมมอง 979ปีที่แล้ว
@exploring technologies #transform #wavelet #matlab #mathworks #matlab_projects #matlab_assignments #phd #mtechprojects #deeplearning #projects #ai #machinelearning #artificialintelligence #matlabcode #research #signalprocessing #imageprocessing #wavelet #signals #matlabproject #imagesearch #mpeg2 #denoising #signalprocessing #denoise Please visit, @www.exptech.co.in/ for more information and d...
Color Edge Features and DWT based Image Retrieval (With MATLAB Code)
มุมมอง 728ปีที่แล้ว
@exploring technologies #transform #wavelet #matlab #mathworks #matlab_projects #matlab_assignments #phd #mtechprojects #deeplearning #projects #ai #machinelearning #artificialintelligence #matlabcode #research #signalprocessing #imageprocessing #wavelet #signals #matlabproject #imagesearch #mpeg Please visit, @www.exptech.co.in/ for more information and downloads. Also follow the Facebook page...
Time Series Prediction using ANFIS (Theory and MATLB Code)
มุมมอง 5Kปีที่แล้ว
#fuzzy #neuralnetworks #timeseries #ANFIS #fuzzycontroller #prediction #wavelet #fuzzylogic #matlab #mathworks #matlab_projects #matlab_assignments #phd #mtechprojects #projects #ai #machinelearning #artificialintelligence #matlabcode #research #signalprocessing #imageprocessing Please visit, @www.exptech.co.in/ for more information and downloads. Also follow the Facebook page: @ Dr...
ANFIS: Neuro-Fuzzy Inference System (Theory and MATLAB Implementation)
มุมมอง 32Kปีที่แล้ว
#fuzzy #neuralnetworks #timeseries #ANFIS #fuzzycontroller #prediction #wavelet #fuzzylogic #matlab #mathworks #matlab_projects #matlab_assignments #phd #mtechprojects #projects #ai #machinelearning #artificialintelligence #matlabcode #research #signalprocessing #imageprocessing Please visit, @www.exptech.co.in/ for more information and downloads. Also follow the Facebook page: @ Dr...
Understanding Fuzzy Logic Controller (FLC) (Theory and MATLAB Implementation)
มุมมอง 34Kปีที่แล้ว
#fuzzy #neuralnetworks #timeseries #ANFIS #fuzzycontroller #prediction #wavelet #fuzzylogic #matlab #mathworks #matlab_projects #matlab_assignments #phd #mtechprojects #projects #ai #machinelearning #artificialintelligence #matlabcode #research #signalprocessing #imageprocessing Please visit, @www.exptech.co.in/ for more information and downloads. Also follow the Facebook page: @ Dr...
Transform Basics (Concepts of Orthogonal, Bi-orthogonal vectors, Basis functions & Transforms)
มุมมอง 1.1K2 ปีที่แล้ว
#fourierseries #fouriertransform #transform #wavelet #fuzzylogic #matlab #mathworks #matlab_projects #matlab_assignments #phd #mtechprojects #projects #ai #machinelearning #artificialintelligence #matlabcode #research #signalprocessing #imageprocessing #deeplearning Please visit, @www.exptech.co.in/ for more information and downloads. Also follow the Facebook page: @ DrAjayKrVerma/?...
Rice Grain Quality Assessment using Morphological Image Processing (Offline and Realtime mode)
มุมมอง 4.6K2 ปีที่แล้ว
#transform #wavelet #fuzzylogic #matlab #mathworks #matlab_projects #matlab_assignments #phd #mtechprojects #deeplearning #projects #ai #machinelearning #artificialintelligence #matlabcode #research #signalprocessing #imageprocessing Please visit, @www.exptech.co.in/ for more information and downloads. Also follow the Facebook page: @ DrAjayKrVerma/?view_public_for=109209970903585 H...
Pseudo Coloring (Grayscale image to Color image Conversion)
มุมมอง 3K2 ปีที่แล้ว
#transform #wavelet #fuzzylogic #matlab #mathworks #matlab_projects #matlab_assignments #phd #mtechprojects #deeplearning #projects #ai #machinelearning #artificialintelligence #matlabcode #research #signalprocessing #imageprocessing Please visit, @www.exptech.co.in/ for more information and downloads. Also follow the Facebook page: @ DrAjayKrVerma/?view_public_for=109209970903585 H...
Discrete Fourier Transform (DFT) of 1-D Signals.
มุมมอง 1K2 ปีที่แล้ว
#fourierseries #fouriertransform #transform #wavelet #fuzzylogic #matlab #mathworks #matlab_projects #matlab_assignments #phd #mtechprojects #deeplearning #projects #ai #machinelearning #artificialintelligence #matlabcode #research #signalprocessing #imageprocessing Please visit, @www.exptech.co.in/ for more information and downloads. Also follow the Facebook page: @ DrAjayKrVerma/?...
Face Recognition using Wavelet Features and PCA (With Code)
มุมมอง 4.3K2 ปีที่แล้ว
#facerecognition #facerecognitionsystem #transform #wavelet #fuzzylogic #matlab #mathworks #matlab_projects #matlab_assignments #phd #mtechprojects #deeplearning #projects #ai #machinelearning #artificialintelligence #matlabcode #research #signalprocessing #imageprocessing Please visit, @www.exptech.co.in/ for more information and downloads. Also follow the Facebook page: @ DrAjayKr...
ECG Based Heart Disease Diagnosis using Wavelet Features and Deep CNN
มุมมอง 23K2 ปีที่แล้ว
#transform #wavelet #fuzzylogic #matlab #mathworks #matlab_projects #matlab_assignments #phd #mtechprojects #deeplearning #projects #ai #machinelearning #artificialintelligence #matlabcode #research #signalprocessing #imageprocessing #deeplearningproject #deeplearningtutorial #ecg Please visit, @www.exptech.co.in/ for more information and downloads. Also follow the Facebook page: @ ...
LTI System Analysis using Python (With Code)
มุมมอง 1.7K2 ปีที่แล้ว
#controlsystem #controlsystems #python #pythonprogramming #pythonprojects #transform #wavelet #fuzzylogic #matlab #mathworks #matlab_projects #matlab_assignments #phd #mtechprojects #deeplearning #projects #ai #machinelearning #artificialintelligence #matlabcode #research #signalprocessing #imageprocessing #deeplearningproject #deeplearningtutorial #ecg #btechprojects Please visit, @www.exptech...
Solution of State Equations (Homogeneous and Non homogeneous eqns.)
มุมมอง 12K2 ปีที่แล้ว
Solution of State Equations (Homogeneous and Non homogeneous eqns.)
Introduction to State Space Analysis (Physical Systems Modelling)
มุมมอง 1.5K2 ปีที่แล้ว
Introduction to State Space Analysis (Physical Systems Modelling)
LTI System Analyzer using MATLAB GUI (With Code)
มุมมอง 2.5K2 ปีที่แล้ว
LTI System Analyzer using MATLAB GUI (With Code)
Denoising of Signals and Images using Wavelet Packet Transform (With code)
มุมมอง 3.8K2 ปีที่แล้ว
Denoising of Signals and Images using Wavelet Packet Transform (With code)
Wavelet Packet Transform of Signals and Images (Theory)
มุมมอง 6K2 ปีที่แล้ว
Wavelet Packet Transform of Signals and Images (Theory)
Object Classification using HOG Features and ECOC-SVM (Shapes Classification Problem)
มุมมอง 3.3K2 ปีที่แล้ว
Object Classification using HOG Features and ECOC-SVM (Shapes Classification Problem)
HOG Features (Theory and Implementation using MATLAB and Python)
มุมมอง 12K2 ปีที่แล้ว
HOG Features (Theory and Implementation using MATLAB and Python)
Walsh Hadamard Transform (Signal Filtering & Image Compression)
มุมมอง 8K2 ปีที่แล้ว
Walsh Hadamard Transform (Signal Filtering & Image Compression)
Symmetrical Components Analysis of Unbalanced 3-phase vector
มุมมอง 3.5K2 ปีที่แล้ว
Symmetrical Components Analysis of Unbalanced 3-phase vector
Animated 2D and 3D Plots using MATLAB
มุมมอง 9K2 ปีที่แล้ว
Animated 2D and 3D Plots using MATLAB
Detecting STOP Traffic Sign using Deep R-CNN (Real Time and Offline Mode)
มุมมอง 3.7K2 ปีที่แล้ว
Detecting STOP Traffic Sign using Deep R-CNN (Real Time and Offline Mode)
How to Choose a Right Wavelet and Wavelet Transform? (Understanding Wavelet's Properties)
มุมมอง 10K2 ปีที่แล้ว
How to Choose a Right Wavelet and Wavelet Transform? (Understanding Wavelet's Properties)
Implementing Deep CNN in Python using Tensor Flow and Keras (Face Mask Detection Problem)
มุมมอง 6332 ปีที่แล้ว
Implementing Deep CNN in Python using Tensor Flow and Keras (Face Mask Detection Problem)
Wavelet Based Robust Spread Spectrum Watermarking of Color Images
มุมมอง 8902 ปีที่แล้ว
Wavelet Based Robust Spread Spectrum Watermarking of Color Images
Hand Gesture Recognition using basic Image Processing and Device Control in Real Time
มุมมอง 3.3K2 ปีที่แล้ว
Hand Gesture Recognition using basic Image Processing and Device Control in Real Time

ความคิดเห็น

  • @WahranRai
    @WahranRai 2 วันที่ผ่านมา

    12:50 MODWT stands for *Maximal* Overlap Discrete Wavelet Transform

  • @bumusay1445
    @bumusay1445 17 วันที่ผ่านมา

    can you give us, the ppt file?

  • @SchwarzerRegen-x4z
    @SchwarzerRegen-x4z 25 วันที่ผ่านมา

    Sir,how can I record 4-ch signals from a array microphone ? It seems that the signals more than 2 channels are not supported

    • @exploringtechnologies9
      @exploringtechnologies9 24 วันที่ผ่านมา

      Yr laptop hardware has only 3.5mm stereo jack, therefore u can record only 2 channels. With help of DAQ, u can record multi channel audio too.

    • @SchwarzerRegen-x4z
      @SchwarzerRegen-x4z 23 วันที่ผ่านมา

      @@exploringtechnologies9 Thanks for the response. I actually want to use the UAC protocol to read the array microphone signals through the USB interface to display four channels in real time, which doesn't work, and I finally solved the problem by using UDP protocol to share data between pyaudio and matlab

  • @SchwarzerRegen-x4z
    @SchwarzerRegen-x4z 25 วันที่ผ่านมา

    Sir,how can I record 4-ch signals from a array microphone ? It seems that the signals more than 2 channels are not supported

  • @amritachatterjee712
    @amritachatterjee712 หลายเดือนก่อน

    from where i can get this matlab code?plz share a link

    • @exploringtechnologies9
      @exploringtechnologies9 หลายเดือนก่อน

      Code is explained in video. Pause the video, take screenshots and get printouts.

  • @sansrit
    @sansrit หลายเดือนก่อน

    This is my first video on wavelets and i learnt something new

  • @bmebri1
    @bmebri1 หลายเดือนก่อน

    20:25 Still sounds bad.

    • @exploringtechnologies9
      @exploringtechnologies9 หลายเดือนก่อน

      It is just a framework to show wavelet's capability to denoise the signal. More parameters tuning is required for better output.

  • @hiramraul7863
    @hiramraul7863 หลายเดือนก่อน

    Dr. Verma, I am working on a project to control a small wind turbine's blade pitch angle to achieve maximum wind energy efficiency without exceeding 47 volts of output. The main inputs for the control system are voltage and RPM. Additionally, the turbine will be enclosed in a box, and the wind will be manually controlled by a person. The problem is that I don't have a wind speed sensor because they are too big and I have to infer the wind speed with the RPM. Given these conditions, what type of control system would you recommend to optimize the blade pitch angle? Would a PID controller, a Fuzzy Logic Controller, a ANFIS ,or another approach be more suitable?

    • @exploringtechnologies9
      @exploringtechnologies9 หลายเดือนก่อน

      Simplest is PID. It can do well. But ANFIS can be tried. Compare both. It will give u one research paper.

  • @sudeepkumar4509
    @sudeepkumar4509 หลายเดือนก่อน

    Good work sir

  • @manmohan-r9z
    @manmohan-r9z หลายเดือนก่อน

    Nicely explained

  • @Y-learningofficials
    @Y-learningofficials หลายเดือนก่อน

    well sir👍

  • @อริย์ธัชพันธุ์บพิธ
    @อริย์ธัชพันธุ์บพิธ หลายเดือนก่อน

    it really helpful.Can you make an example fuzzy logic Control for MIMO system thank you🙏

  • @Saironi
    @Saironi 2 หลายเดือนก่อน

    The images of wavelets you show are > 0 . But one of the properties of wavelets is that they need to have a mean of 0. Are you using purely positive wavelets? is that even possible?

    • @exploringtechnologies9
      @exploringtechnologies9 2 หลายเดือนก่อน

      Tell me video time instant where u have queries.

  • @josecoba2713
    @josecoba2713 2 หลายเดือนก่อน

    excellent video, thank you

  • @durgavelu6451
    @durgavelu6451 2 หลายเดือนก่อน

    I got an error in line [x, Fs]=audioread(num2str(filename)) ;

  • @SRameshBabu-lv1kd
    @SRameshBabu-lv1kd 2 หลายเดือนก่อน

    thanks sir.

  • @dkjsfpv
    @dkjsfpv 2 หลายเดือนก่อน

    Hi, can I have the image file?

    • @exploringtechnologies9
      @exploringtechnologies9 2 หลายเดือนก่อน

      Go to my website, www.exptech.co.in Go to Resource download.

  • @dkjsfpv
    @dkjsfpv 2 หลายเดือนก่อน

    can I have data file of your examples? for example, input audio file and so on.

    • @exploringtechnologies9
      @exploringtechnologies9 2 หลายเดือนก่อน

      Visit my website www.exptech.co.in Go to download resources.

  • @MonaAwad123
    @MonaAwad123 2 หลายเดือนก่อน

    Thank you so much , I need the source papers pls

  • @SnehaSinha-j4b
    @SnehaSinha-j4b 2 หลายเดือนก่อน

    Which editor you are using sir ?.....i used online editor and its shows me timed out

  • @dr.amint.yousefalqudah6976
    @dr.amint.yousefalqudah6976 2 หลายเดือนก่อน

    Thanks for this lecture. Can I get the ppt file and the MATLAB files?. Thanks

    • @exploringtechnologies9
      @exploringtechnologies9 2 หลายเดือนก่อน

      Code is in video. Pause the video, take screenshot and then printouts.

  • @durgavelu6451
    @durgavelu6451 2 หลายเดือนก่อน

    I have got ah error when I run this code xn=awgn(x, 15,'measured') ; in this line

  • @ripungupta3887
    @ripungupta3887 3 หลายเดือนก่อน

    Can we get exact length and width of rice sample in mm given the fixed length of sample taking sheet . I need to discuss more on this in detail if you are interested

    • @exploringtechnologies9
      @exploringtechnologies9 2 หลายเดือนก่อน

      Yes you can get in mm. For that u need to fix camera resolution, it's distance from the surface then calibrate for pixels=mm with standard length objects.

  • @manfredbogner9799
    @manfredbogner9799 3 หลายเดือนก่อน

    Sehr gut

  • @kietnguyentuan3838
    @kietnguyentuan3838 3 หลายเดือนก่อน

    I need that image file(folder), can you give it to me?

    • @exploringtechnologies9
      @exploringtechnologies9 3 หลายเดือนก่อน

      Go to my website, www.exptech.co.in/2021/03/video-21-mnist-dataset-digit-fashion-to.html?m=1 Use the code to get output images.

  • @caotriinh3236
    @caotriinh3236 3 หลายเดือนก่อน

    Thank you so much for your kind sharing and explanation

  • @shalbbyaali1852
    @shalbbyaali1852 3 หลายเดือนก่อน

    Thank you so much for this, detailed clear and indepth teaching in a simple way! God bless you, keep making more content

  • @HakanÖztürk-z6s
    @HakanÖztürk-z6s 3 หลายเดือนก่อน

    Hello, If we have a system with unit feedback and step input and we want to control it with fuzzy logic control and we want to make the 0 error, won't all the rules be the same in this case? Shouldn't the output of all the rules go to number 1?

  • @ВалерияАлександровна-м2ъ
    @ВалерияАлександровна-м2ъ 3 หลายเดือนก่อน

    Thanks! This helped me.

  • @fiasse067
    @fiasse067 3 หลายเดือนก่อน

    hi can you make a tutorial about face recognition with the matlab version R2023b? PLEASEEEE I NEED UR HELP,,,

    • @exploringtechnologies9
      @exploringtechnologies9 3 หลายเดือนก่อน

      The MATLAB code, which I have explained in the video will also run in 2023b. Just try it.

  • @supriyamk2341
    @supriyamk2341 3 หลายเดือนก่อน

    hi sir , this code is ececuted for the image u have provided. but if i take mages it is showing rice sample is rejected for all images. why this sir?

    • @exploringtechnologies9
      @exploringtechnologies9 3 หลายเดือนก่อน

      Because it is made for rice on the basis of width/height ratio of the grain. Adjust the parameters according to your need.

    • @supriyamk2341
      @supriyamk2341 3 หลายเดือนก่อน

      @@exploringtechnologies9 sir can i share the image??

  • @allaeddinehamdani3168
    @allaeddinehamdani3168 4 หลายเดือนก่อน

    Could you please explain how to make 1d signal classification using wsn

  • @allaeddinehamdani3168
    @allaeddinehamdani3168 4 หลายเดือนก่อน

    ❤❤ thank you so much

  • @allaeddinehamdani3168
    @allaeddinehamdani3168 4 หลายเดือนก่อน

    Thank you so much ❤

  • @ushas3349
    @ushas3349 4 หลายเดือนก่อน

    Sir, Thank you for all your videos. Your explanation is very good. I follow all your series(control system as well as wavelet). Can you briefly explain how you got 7 matrices of 391 X 7 as SWT coefficients? 7 is 1+ 6 rotations ? is is due to down sampling of the image? Please give your calculation for 7 x 391 x 7. It would help me understand the concept better. Thank you once again. Usha

    • @exploringtechnologies9
      @exploringtechnologies9 4 หลายเดือนก่อน

      Yess...Down sampling is done. Foe more details, watch my previous video on wavelet scattering transform.

  • @Dhanyas_vlog
    @Dhanyas_vlog 4 หลายเดือนก่อน

    Sir I want build a website which takes real time gestures and gives the description of that gesture shown , maybe like google lens ,can u guide me on how to do it

    • @exploringtechnologies9
      @exploringtechnologies9 4 หลายเดือนก่อน

      First learn and implement AI based gesture recognition and integrate that in a website.

  • @Dhanyas_vlog
    @Dhanyas_vlog 4 หลายเดือนก่อน

    Sir I want build a website which takes real time gestures and gives the description of that gesture shown , maybe like google lens ,can u guide me on how to do it

  • @pawanesh_mnnit
    @pawanesh_mnnit 4 หลายเดือนก่อน

    Unrecognized function or variable 'reshapedobj'. Error in mnisttopng (line 22) digit=uint8(reshapedobj(digit)); ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

    • @exploringtechnologies9
      @exploringtechnologies9 3 หลายเดือนก่อน

      I think u have not written the code for that function. Exactly follow what I have explained in video.

  • @rummankhan
    @rummankhan 4 หลายเดือนก่อน

    Hi, Really nice video. Can you also do a small comparison between denoising using wavelet transform and denoising using the classic convolution based or frequency domain based filters?

    • @exploringtechnologies9
      @exploringtechnologies9 4 หลายเดือนก่อน

      You should try urself. It is easy. If u feel difficulty, i will help.

    • @rummankhan
      @rummankhan 4 หลายเดือนก่อน

      @@exploringtechnologies9 You are right. I looked at it and it turns out they are pretty similar effectively. I am new to this wavelet based technique for image processing. Trying to figure out what this wavelet transform technique offers in image processing that is not so effective in other available methods. will go through your lecture to learn more.

  • @VishnuPriya-gd4vp
    @VishnuPriya-gd4vp 4 หลายเดือนก่อน

    Absolutely clear explanations.. Thank you..

  • @talkingbirb2808
    @talkingbirb2808 5 หลายเดือนก่อน

    thank you for the examples and a lot of visuzlisation!

  • @sunitaverma5352
    @sunitaverma5352 5 หลายเดือนก่อน

    Super explain

  • @Samet-qv9yf
    @Samet-qv9yf 5 หลายเดือนก่อน

    hi, do you know where can i find sample images/videos for image fusion?

    • @exploringtechnologies9
      @exploringtechnologies9 5 หลายเดือนก่อน

      Go to my website exptech.co.in Goto resource download

  • @amritpaul8535
    @amritpaul8535 5 หลายเดือนก่อน

    Sir, can you please give me the code for Wavelet Packet Transform.

    • @exploringtechnologies9
      @exploringtechnologies9 5 หลายเดือนก่อน

      Code is in my video. I have explained each steps.

    • @amritpaul8535
      @amritpaul8535 5 หลายเดือนก่อน

      Can I use Wavelet packet transform in python. If yes, then please suggest me the code for python.

  • @mohamadhamoudy8232
    @mohamadhamoudy8232 5 หลายเดือนก่อน

    Dear Professor , please could you kindly explain how to use wavelets for classification of ecg signals and another for classifying Audio files , thanks and best regards

    • @exploringtechnologies9
      @exploringtechnologies9 5 หลายเดือนก่อน

      Go through my previous videos in channel and find the video related to ECG classification.

  • @satyabratadas5285
    @satyabratadas5285 5 หลายเดือนก่อน

    Sir how to get distorted images which you have applied to test robustness of algorithm? For ex how to get pixelized image , oil painted image. crop image etc of a given image?

    • @exploringtechnologies9
      @exploringtechnologies9 5 หลายเดือนก่อน

      You can use software like Irfanview to give such distortion.

  • @nikeetakurrey4376
    @nikeetakurrey4376 5 หลายเดือนก่อน

    Very good explanation

  • @CurrentAffairByAKThakur
    @CurrentAffairByAKThakur 5 หลายเดือนก่อน

    Sir I want to extract features form the signal by using cwt stft and Wsst ... Can I use some other similar methods for feature extraction who's inverse is also possible ?

    • @exploringtechnologies9
      @exploringtechnologies9 5 หลายเดือนก่อน

      To extract features only, inverse transform is not required. If inverse is needed for some other objectives, then use DWT.

    • @CurrentAffairByAKThakur
      @CurrentAffairByAKThakur 5 หลายเดือนก่อน

      @@exploringtechnologies9 i want to use it for regression problem so that I can revert back the signal into origional form for comparison that's why I was looking for inverse too

  • @manmohan7151
    @manmohan7151 5 หลายเดือนก่อน

    Nicely explained

  • @kdas4029
    @kdas4029 5 หลายเดือนก่อน

    Nice Video