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class="docMainContainer_2iGs"><div class="container padding-vert--lg docItemWrapper_1bxp"><div class="row"><div class="col docItemCol_U38p"><div class="docItemContainer_a7m4"><article><header><h1 class="docTitle_Oumm">Reducing false positives</h1></header><div class="markdown"><p>Tune your object filters to adjust false positives: <code>min_area</code>, <code>max_area</code>, <code>min_score</code>, <code>threshold</code>.</p><p>For object filters in your configuration, any single detection below <code>min_score</code> will be ignored as a false positive. <code>threshold</code> is based on the median of the history of scores (padded to 3 values) for a tracked object. Consider the following frames when <code>min_score</code> is set to 0.6 and threshold is set to 0.85:</p><table><thead><tr><th>Frame</th><th>Current Score</th><th>Score History</th><th>Computed Score</th><th>Detected Object</th></tr></thead><tbody><tr><td>1</td><td>0.7</td><td>0.0, 0, 0.7</td><td>0.0</td><td>No</td></tr><tr><td>2</td><td>0.55</td><td>0.0, 0.7, 0.0</td><td>0.0</td><td>No</td></tr><tr><td>3</td><td>0.85</td><td>0.7, 0.0, 0.85</td><td>0.7</td><td>No</td></tr><tr><td>4</td><td>0.90</td><td>0.7, 0.85, 0.95, 0.90</td><td>0.875</td><td>Yes</td></tr><tr><td>5</td><td>0.88</td><td>0.7, 0.85, 0.95, 0.90, 0.88</td><td>0.88</td><td>Yes</td></tr><tr><td>6</td><td>0.95</td><td>0.7, 0.85, 0.95, 0.90, 0.88, 0.95</td><td>0.89</td><td>Yes</td></tr></tbody></table><p>In frame 2, the score is below the <code>min_score</code> value, so frigate ignores it and it becomes a 0.0. The computed score is the median of the score history (padding to at least 3 values), and only when that computed score crosses the <code>threshold</code> is the object marked as a true positive. That happens in frame 4 in the example.</p></div></article><div class="margin-vert--xl"><div class="row"><div class="col"><a href="https://github.com/blakeblackshear/frigate/edit/master/docs/docs/configuration/false_positives.md" target="_blank" rel="noreferrer noopener"><svg fill="currentColor" height="1.2em" width="1.2em" preserveAspectRatio="xMidYMid meet" role="img" viewBox="0 0 40 40" class="iconEdit_2LL7"><g><path d="m34.5 11.7l-3 3.1-6.3-6.3 3.1-3q0.5-0.5 1.2-0.5t1.1 0.5l3.9 3.9q0.5 0.4 0.5 1.1t-0.5 1.2z m-29.5 17.1l18.4-18.5 6.3 6.3-18.4 18.4h-6.3v-6.2z"></path></g></svg>Edit this page</a></div></div></div><div class="margin-vert--lg"><nav class="pagination-nav" aria-label="Blog list page navigation"><div class="pagination-nav__item"><a class="pagination-nav__link" href="/frigate/configuration/detectors"><div class="pagination-nav__sublabel">Previous</div><div class="pagination-nav__label">« Detectors</div></a></div><div class="pagination-nav__item pagination-nav__item--next"><a class="pagination-nav__link" href="/frigate/configuration/objects"><div class="pagination-nav__sublabel">Next</div><div class="pagination-nav__label">Default available objects »</div></a></div></nav></div></div></div><div class="col col--3"><div class="tableOfContents_2xL- thin-scrollbar"></div></div></div></div></main></div></div><footer class="footer footer--dark"><div class="container"><div class="row footer__links"><div class="col footer__col"><h4 class="footer__title">Community</h4><ul class="footer__items"><li class="footer__item"><a href="https://github.com/blakeblackshear/frigate" target="_blank" rel="noopener noreferrer" class="footer__link-item">GitHub</a></li><li class="footer__item"><a href="https://github.com/blakeblackshear/frigate/discussions" target="_blank" rel="noopener noreferrer" class="footer__link-item">Discussions</a></li></ul></div></div><div class="footer__bottom text--center"><div class="footer__copyright">Copyright © 2021 Blake Blackshear</div></div></div></footer></div>
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