list - Determine "wiggliness" of set of data - Python -

-

i'm working on piece of software needs implement wiggliness of set of data. here's sample of input receive, merged lightness plot of each vertical pixel strip: alt text

it easy see left margin really wiggly (i.e. has ton of minima/maxima), , want generate set of critical points of image. i've applied gaussian smoothing function data ~ 10 times, seems pretty wiggly begin with.

any ideas?

here's original code, not produce nice results (for wiggliness):

def local_maximum(list, center, delta):   maximum = [0, 0]    in range(delta):     if list[center + i] > maximum[1]: maximum = [center + i, list[center + i]]     if list[center - i] > maximum[1]: maximum = [center - i, list[center - i]]    return maximum  def count_maxima(list, start, end, delta, threshold = 10):       count = 0    in range(start + delta, end - delta):     if abs(list[i] - local_maximum(list, i, delta)[1]) < threshold: count += 1    return count  def wiggliness(list, start, end, delta, threshold = 10):   return float(abs(start - end) * delta) / float(count_maxima(list, start, end, delta, threshold))

take @ lowpass/highpass/notch/bandpass filters, fourier transforms, or wavelets. basic idea there's lots of different ways figure out frequency content of signal quantized on different time-periods.

if can figure out wiggliness is, help. leftmost margin wiggly b/c has more high-frequency content, visualize using fourier transform.

if take highpass filter of red signal, you'll high frequency content, , can measure amplitudes , thresholds determine wiggliness. guess wiggliness needs more formalism behind it.


Comments

Post a Comment

Popular posts from this blog

android - Spacing between the stars of a rating bar? -

-
ho can set spacing beween stars? thats ratingbar: ratingbar = (ratingbar) inflater.inflate(r.layout.ratingbar, null); ratingbar.setlayoutparams(new layoutparams(layoutparams.wrap_content, layoutparams.wrap_content)); the layout: <?xml version="1.0" encoding="utf-8"?> <ratingbar xmlns:android="http://schemas.android.com/apk/res/android" style="@style/mystyle" android:layout_alignparentright="true" android:layout_height="19dp" android:layout_width="wrap_content" android:numstars="5"> </ratingbar> the style: <style name="mystyle" parent="@android:style/widget.ratingbar"> <item name="android:progressdrawable">@drawable/android_r2_ratingstar_yellow</item> <item name="android:indeterminatedrawable">@drawable/android_r2_ratingstar_grey</item> </style> thanks, cheers you have
Read more

aspxgridview - Devexpress grid - header filter does not work if column is initially hidden -

-
i'm using devexpress grid , i'm trying 'country' column display header filter properly: <dx:gridviewdatacolumn caption="country" fieldname="countryname" showincustomizationform="true" visible="false"> <settings allowheaderfilter="true"/> </dx:gridviewdatacolumn> if 'country' column set visible='true', header filter displayed should(it shows value option list). however, want 'country' column hidden, available in customization window(like in code above). in case, when column dragged outside customization window , grid , header filter clicked, javascript error encountered: element null element.addeventlistener(eventname, func, true); is known bug? there workarounds? set aspxgridview.settings.showheaderfilterbutton property true resolve problem. the following markup works fine me (i using dxperience 10.1.7): <asp:accessdatasource id="accessda
Read more

c# - How to execute a particular part of code asynchronously in a class -

-
i creating speech recognition engine that's going respond user commands.i have created button enable , disable speech recognition per user convenience.i have used dispose() of speech engine disable speech recoginition.here code private void button1_click(object sender, routedeventargs e) { engineon = !engineon; if (engineon) { speechengine = speech.createspeechengine(); //speech class creates , returns new speech engine. speechengine.audiolevelupdated += new eventhandler<audiolevelupdatedeventargs>(speechengine_audiolevelupdated); // use system's default microphone speechengine.setinputtodefaultaudiodevice(); speechengine.loadgrammar(new dictationgrammar()); // start listening speechengine.recognizeasync(recognizemode.multiple); } else { speechclass.myengine.dispose(); } } but disposal of speech obj
Read more