Make your own free website on Tripod.com
Home
 
JAVA Wavelet Analyzer

This applet is a powerful wavelet analyze toolkit.  It can do dyadic wavelet transform, wavelet packet transform. And you can use it to design wavelet youself. You can also download a local version of this applet, which can run in windows 3.x or windows 95.
If you can't see a RUN button and a STOP button below, you browser do not support JAVA applet, or you closed the support to JAVA applet in security setting of your browser. Use a browser that support JAVA applet, such as IE3.0, or open the security switch.  Press RUN below to start this applet and to see how strong it is.


For the security of browser, a JAVA applet can't access local resources of you computer, So it can't read or write files in your computer. This is very inconvenient for designer and user in some occasion. To add a JAVA applete the ability of access local resources, we design a little program, Localman, to work with this applet. Download Localman and run it in your computer, then the applet can access the local resources via Localman. Otherwise the applet can only used as a demo.
I had tested that IE3.0 support Localman, but Netscape 4.0 do not support it. To check whether  your browser support Localman is very simple: Run Localman first, then open SAT switch in the applet. If it show success, you browser support Localman, otherwise your browser do't support it.


Help Message
1.Toolbar

a)Open a data file of WAV, TXT, or DAT. (This function need support of Local man.)
b)Save signal to a WAV, TXT or DAT file. (This function need support of Local man.)
c)Curve cursor: This function is used to show the value of a special point in the curve. Move mouse to the point you want to know.
d)Peak List: This function is used to list the peaks in curve. Move mouse to the point you want to know, then click mouse to select it. You can select many points at one time, then press "show" button to see the values of them.
e) To Clipboard(BMP): This function copy the analyze result to clipboard.
f) To BMP File: This function save the analyze result to a Bitmap file.(This function need support of Local man.)
g) To Word: This function insert the analyze result to Word. Before use this function, You should run Word first, and open a new file, then go back to this applet. (This function need support of Local man.)
h) To Printer: This function copy the analyze result to a printer.(This function need support of Local man.)
i) To Editbox: This function copy the analyze result to editbox in applet, Press "show" button to see.
j) To TXT File: This function save the analyze result to a TXT file. (This function need support of Local man.)
k) To Excel: This function insert the analyze result to Excel. Before use this function, You should run Excel first, and open a new sheet, then go back to this applet. (This function need support of Local man.)
l) Help: Show help message. (This file.)
m) Demo: Show the main functions of the applet. This will take about two minutes.
n) Home: Show the WWW address of designer.
.
2 Level Scroll
The level scroll is used to move the signal in display window.
.
3 Vertical Scroll
The vertical scroll is used to zoom in tht signal wave.
.
4.SAT Switch
This button is used to open or close the local resources accessing switch. If you chose open, a echo client function is  active, it transmit the related requests of applet to Localman(echo server) to access local resources.
Caution: Localman must run first, otherwise the applet should be blocked.
.
5.Show Button
This button is used to open editbox to see data transfer to it.
.
4. Menus
(1) Signal
a) Read File (This function need support of Local man.)
This function read signal from a WAV, TXT or DAT data file format. The DAT data file format is defined as:
"ILFI"            /*File Mark                  4 char     */
Nch               /*Channel number         1 int      */
Mlen              /*data length                 1 long int */
dt                   /*sample interval           1 float    */
v[1]                /*CH 1 scale factor       1 float    */
:
v[Nch]           /* CH N scale factor     1 float    */
x[1][1]           /*data 1 of CH 1           1 int      */
:
x[N][1]          /*data 1 of CH N           1 int      */
x[1][2]           /*data 2 of CH 1            1 int      */
:
x[N][2]           /*data 2 of CH N           1 int      */
:
x[1][M]           /*data M of CH 1          1 int      */
:
x[N][M]           /*data M of CH N         1 int      */.
b)Save  (This function need support of Local man.)
This function save signal to a WAV, TXT or DAT file.
c) Signal Generate
This function is used to produce a stimulate signal source of white noise,sine, and so on.
d) A/D(Sound Card) (This function need support of Local man.)
This function is used to record a signal from a sound card.
e)Exit
This function close applet window and return to browser.
.
(2)Waveform: Show waveform of signal.
. .
(3)Wavelet:
a)Symetric Wavelet
This function is used to set the wavelet filter to a symetric wavelet filter.
b)Anti-symetric Wavelet
This function is used to set the wavelet filter to a anti-symetric wavelet filter.
c)Orthogonal Wavelet
This function is used to set the wavelet filter to a orthogonal wavelet filter that has a length of 8.
d)Orthogonal Wavelet
This function is used to set the wavelet filter to a Orthogonal Wavelet filter that has a length of 16.
e)Filter Design
.   (a) Symetric Wavelet Filter
.        This function is used to design the Symetric Wavelet Filter by desired amplitude character.
.    (b) Anti-Symetric Wavelet Filter
.        This function is used to design the Anti-Symetric Wavelet Filter by desired amplitude character.
.
(4)Discrete Dyadic Wavelet Transform
a) Forward(Line)
This function do wavelet transform by selected wavelet filter, and result is show in line manner.
b) Forward(Color)
This function do wavelet transform by selected wavelet filter, and result is show in color manner.
c) Wavelet Coefficients
These functions is used to show wavelet coefficients after transform.
.
5.Wavelet Packet
This function do wavelet packet transform by selected wavelet filter, and result is show in packet manner.

Return