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AI on the Edge Device
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Model Selection
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Getting Started
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Welcome
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Installation
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Initial Setup
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Hardware Compatibility
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Best Practice
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Frequently Asked Questions
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Configuration
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Configuration
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Reference Image
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<li class="md-nav__item">
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Alignment References
</span>
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<a class="md-nav__link" href="../ROI-Configuration/">
<span class="md-ellipsis">
ROIs (Regions of Interest)
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Graphical Configuration
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Model Selection
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Model Selection
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Table of contents
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<a class="md-nav__link" href="#digit-models">1.1
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Digit Models
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dig-class11
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Main features
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Main features
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<a class="md-nav__link" href="#dig-class100-vs-dig-cont">1.1.2.2
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dig-class100 vs. dig-cont
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<a class="md-nav__link" href="#analog-pointer-models">1.2
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Analog pointer models
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Main features
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<a class="md-nav__link" href="#ana-class100-vs-ana-cont">1.2.1.2
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ana-class100 vs. ana-cont
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<a class="md-nav__link" href="#different-types-of-models-normal-vs-quantized">1.3
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Different types of models (normal vs. quantized)
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Example:
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Over-The-Air (OTA) Update
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Advanced
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Advanced
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<a class="md-nav__link" href="../Parameters/">
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Parameters
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Integration into Home Assistant
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<a class="md-nav__link" href="../External-LED/">
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External LED
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<a class="md-nav__link" href="../data-logging/">
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Data Logging
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<a class="md-nav__link" href="../rolling-installation/">
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Living on the Edge
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</li>
<li class="md-nav__item">
<a class="md-nav__link" href="../Watermeter-specific-analog---digital-transition/">
<span class="md-ellipsis">
Analog/Digital Transition on Water Meters
</span>
</a>
</li>
<li class="md-nav__item">
<a class="md-nav__link" href="../collect-new-images/">
<span class="md-ellipsis">
Collect images to improve the models
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</a>
</li>
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<a class="md-nav__link" href="../Learn-models-with-your-own-images/">
<span class="md-ellipsis">
Learn a model with your own images
</span>
</a>
</li>
<li class="md-nav__item">
<a class="md-nav__link" href="../Correction%20Algorithm/">
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Correction Algorithm
</span>
</a>
</li>
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<a class="md-nav__link" href="../Neural-Network-Types/">
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Neural Network Types
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<a class="md-nav__link" href="../Additional-Information/">
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Additional Information
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</li>
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<a class="md-nav__link" href="../New-Releases-Notification/">
<span class="md-ellipsis">
Notification about new Releases
</span>
</a>
</li>
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<a class="md-nav__link" href="../prometheus-openmetrics/">
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Prometheus/OpenMetrics
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Troubleshooting
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Troubleshooting
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<a class="md-nav__link" href="../Error-Codes/">
<span class="md-ellipsis">
Reduced webinterface (error codes)
</span>
</a>
</li>
<li class="md-nav__item">
<a class="md-nav__link" href="../StatusLED-BlinkCodes/">
<span class="md-ellipsis">
Board status LED (blink codes)
</span>
</a>
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<a class="md-nav__link" href="../WLAN-disconnect-reason/">
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WLAN disconnect reasons
</span>
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<a class="md-nav__link" href="../Error-Debugging/">
<span class="md-ellipsis">
Often observed issues
</span>
</a>
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<a class="md-nav__link" href="../Frequent-Reboots/">
<span class="md-ellipsis">
Basic hardware/config issues
</span>
</a>
</li>
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Demo mode
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Quick Links
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Quick Links
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Releases
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Web Installer/Console
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<a class="md-nav__link" href="https://github.com/jomjol/AI-on-the-edge-device/issues">
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Create an Issue
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<a class="md-nav__link" href="https://github.com/jomjol/AI-on-the-edge-device/discussions">
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<a class="md-nav__link" href="#digit-models">1.1
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Digit Models
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<a class="md-nav__link" href="#dig-class11">1.1.1
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dig-class11
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Main features
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<a class="md-nav__link" href="#dig-class100-dig-cont">1.1.2
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dig-class100 / dig-cont
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Main features
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<a class="md-nav__link" href="#dig-class100-vs-dig-cont">1.1.2.2
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dig-class100 vs. dig-cont
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Analog pointer models
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ana-class100 / ana-cont
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Main features
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<a class="md-nav__link" href="#ana-class100-vs-ana-cont">1.2.1.2
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ana-class100 vs. ana-cont
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<h1 id="model-selection"><span class="enumerate-headings-plugin enumerate-heading-plugin">1.</span> Model Selection</h1>
<div class="admonition notes">
<p class="admonition-title">Notes</p>
<p>See <a href="../Neural-Network-Types/">Neural Network Types</a> for additional details.</p>
</div>
<p>In the <a href="../Configuration/">Graphical Configuration Page</a>, you can choose different models depending on your needs.</p>
<p>This page tries to help you on which model to select.
For more technical/deeper explanations have a look on <a href="../Neural-Network-Types/">Neural-Network-Types</a>.</p>
<h2 id="digit-models"><span class="enumerate-headings-plugin enumerate-heading-plugin">1.1</span> Digit Models</h2>
<p>For digits on water meters, gas-meters or power meters you can select between two main types of models.</p>
<h3 id="dig-class11"><span class="enumerate-headings-plugin enumerate-heading-plugin">1.1.1</span> dig-class11</h3>
<p>This model can recognize full digits. It was the first model version. All intermediate states shown a "N" for not a number. But in post process it uses older values to fill up the "N" values if possible.</p>
<p><img alt="" src="../img/dig-class11.png" style="width:300px"/></p>
<p>It's possibly a good fallback, if <code>dig-cont/dig-class100</code> results are not good.</p>
<h4 id="main-features"><span class="enumerate-headings-plugin enumerate-heading-plugin">1.1.1.1</span> Main features</h4>
<ul>
<li>well suited for LCD digits</li>
<li>the ExtendedResolution option is not supported. (Only in conjunction with ana-class100 / ana-cont)</li>
</ul>
<h3 id="dig-class100-dig-cont"><span class="enumerate-headings-plugin enumerate-heading-plugin">1.1.2</span> dig-class100 / dig-cont</h3>
<p>These models are used to get a continuous reading with intermediate states. To see what the models are doing, you can go to the Recognition page.</p>
<p><img alt="" src="../img/dig-class100.png" style="width:300px"/></p>
<h4 id="main-features_1"><span class="enumerate-headings-plugin enumerate-heading-plugin">1.1.2.1</span> Main features</h4>
<ul>
<li>suitable for all digit displays.</li>
<li>Advantage over dig-class11 that results continue to be calculated in the transition between digits.</li>
<li>With the ExtendedResolution option, higher accuracy is possible by adding another digit.</li>
</ul>
<p>Look <a href="https://jomjol.github.io/neural-network-digital-counter-readout">here</a> for a list of digit images used for the training.</p>
<h4 id="dig-class100-vs-dig-cont"><span class="enumerate-headings-plugin enumerate-heading-plugin">1.1.2.2</span> dig-class100 vs. dig-cont</h4>
<p>The difference is in the internal processing. </p>
<p>The dig-class100 is a standard classification model. Each tenth step is an output. </p>
<p>dig-cont uses two outputs and arctangent to get the result. You see very complicated. </p>
<p>Try both models on your device and take the one that gives you the best results.</p>
<h2 id="analog-pointer-models"><span class="enumerate-headings-plugin enumerate-heading-plugin">1.2</span> Analog pointer models</h2>
<h3 id="ana-class100-ana-cont"><span class="enumerate-headings-plugin enumerate-heading-plugin">1.2.1</span> ana-class100 / ana-cont</h3>
<p>For pointers on water meters use the analog models. You can only choose between ana-class100 and ana-cont. Both do mainly the same.</p>
<p><img alt="" src="../img/ana-class100.png" style="width:250px"/></p>
<h4 id="main-features_2"><span class="enumerate-headings-plugin enumerate-heading-plugin">1.2.1.1</span> Main features</h4>
<ul>
<li>for all analogue pointers, especially for water meters.</li>
<li>With the ExtendedResolution option, higher accuracy is possible by adding another digit.</li>
</ul>
<p>Look <a href="https://jomjol.github.io/neural-network-analog-needle-readout/">here</a> for a list of pointer images used for the training</p>
<h4 id="ana-class100-vs-ana-cont"><span class="enumerate-headings-plugin enumerate-heading-plugin">1.2.1.2</span> ana-class100 vs. ana-cont</h4>
<p>The difference is in the internal processing.</p>
<p>Take the one that gives you the best results. Both models learn from the same data.</p>
<h2 id="different-types-of-models-normal-vs-quantized"><span class="enumerate-headings-plugin enumerate-heading-plugin">1.3</span> Different types of models (normal vs. quantized)</h2>
<p>The normally trained network is calculating with internal floating point numbers. The saving of floating point numbers naturally takes more space than an integer type. Often the increased accuracy is not needed. Therefore there is the option, to "quantize" a neural network. In this case the internal values are rescaled to integer values, which is called "quantization". The stored tflite files are usually much smaller and runs faster on the edgeAI-device.
Usually the models are distrusted therefore in both versions. They can be distinguished by a "-q" at the end of the logfile.</p>
<h4 id="example"><span class="enumerate-headings-plugin enumerate-heading-plugin">1.3.0.1</span> Example:</h4>
<table>
<thead>
<tr>
<th style="text-align: left;">Type</th>
<th>Name</th>
</tr>
</thead>
<tbody>
<tr>
<td style="text-align: left;">Normal</td>
<td><code>dig-cont_0610_s3.tflite</code></td>
</tr>
<tr>
<td style="text-align: left;">Quantized</td>
<td><code>dig-cont_0610_s3-q.tflite</code></td>
</tr>
</tbody>
</table>
</article>
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