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FilterReview: allow FFT window overlap to be changed for raw logs #378

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FilterReview: allow FFT window overlap to be changed for raw logs #378

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14 changes: 12 additions & 2 deletions FilterReview/FilterReview.js
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Original file line number Diff line number Diff line change
Expand Up @@ -293,8 +293,16 @@ function run_batch_fft(data_set) {
const sample_time = sample_rate_count / sample_rate_sum


// Hard code 50% overlap
const window_overlap = 0.5
// Overlap between windows, batch logs always use 50% so that the window size is a power of two for the windows per batch selections
let window_overlap = 0.5
if (Gyro_batch.type != "batch") {
const overlap_percent = parseFloat(document.getElementById("FFTWindow_overlap").value)
if (!(overlap_percent >= 0) || !(overlap_percent <= 90)) {
alert('Overlap must be between 0 and 90%')
throw new Error()
}
window_overlap = overlap_percent * 0.01
}

var window_size
if (Gyro_batch.type == "batch") {
Expand Down Expand Up @@ -369,6 +377,7 @@ function reset() {

document.getElementById("FFTWindow_per_batch").disabled = true
document.getElementById("FFTWindow_size").disabled = true
document.getElementById("FFTWindow_overlap").disabled = true
document.getElementById("TimeStart").disabled = true
document.getElementById("TimeEnd").disabled = true

Expand Down Expand Up @@ -2425,6 +2434,7 @@ async function load(log_file) {
document.getElementById("log_type_raw").disabled = true

document.getElementById("FFTWindow_size").disabled = use_batch
document.getElementById("FFTWindow_overlap").disabled = use_batch
document.getElementById("FFTWindow_per_batch").disabled = !use_batch


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23 changes: 13 additions & 10 deletions FilterReview/index.html
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Expand Up @@ -93,19 +93,22 @@ <h1 style="text-align:center; margin-block-end: 0.25em;"><a href="" style="color
<ul>
<li>Increasing window size increases frequency resolution and decreases temporal resolution. This is useful when looking at low frequencies, but due to the decreased temporal resolution longer hover flights are needed.</li>
<li>Decreasing window size reduces frequency resolution and increases temporal resolution. This is useful when using the IMU Spectrogram to review notch tracking in dynamic flight.</li>
</ul>'
</ul>
With raw sensor logging the overlap between windows can also be changed. More overlap gives more windows to average, smoothing the spectrum and giving a finer time step in the IMU Spectrogram, at the cost of calculation time. Batch logging always uses 50%.'
data-tippy-maxWidth='750px'/>
</legend>
<table>
<table style="border-spacing: 0 2px">
<tr>
<td style="width: 125px;">
<label for="FFTWindow_per_batch">Windows per batch</label><br><br>
<label for="FFTWindow_size">Windows size</label>
</td>
<td>
<input id="FFTWindow_per_batch" name="FFTWindow_per_batch" type="number" min="1" step="1" value="1" onchange="clear_calculation()" style="width:50px"/><br><br>
<input id="FFTWindow_size" name="FFTWindow_size" type="number" min="1" step="1" value="1024" onchange="fft_window_size_inc(event); clear_calculation()" style="width:50px"/>
</td>
<td style="width: 125px;"><label for="FFTWindow_per_batch">Windows per batch</label></td>
<td><input id="FFTWindow_per_batch" name="FFTWindow_per_batch" type="number" min="1" step="1" value="1" onchange="clear_calculation()" style="width:50px"/></td>
</tr>
<tr>
<td><label for="FFTWindow_size">Windows size</label></td>
<td><input id="FFTWindow_size" name="FFTWindow_size" type="number" min="1" step="1" value="1024" onchange="fft_window_size_inc(event); clear_calculation()" style="width:50px"/></td>
</tr>
<tr>
<td><label for="FFTWindow_overlap">Overlap (%)</label></td>
<td><input id="FFTWindow_overlap" name="FFTWindow_overlap" type="number" min="0" max="90" step="5" value="50" onchange="clear_calculation()" style="width:50px"/></td>
</tr>
</table>
</fieldset>
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