A Public Ground-Truth Dataset for Handwritten Circuit Diagram Images

<p><strong>CGHD</strong></p> <p>This dataset contains images of hand-drawn electrical circuit diagrams as well as accompanying annotation and segmentation ground-truth files. It is intended to train (e.g. ANN) models for extracting electrical graphs from raster graphics.</p> <p><strong>Content</strong></p> <ul> <li><strong>3.269</strong> Annotated Raw Images<br> <ul> <li>31 Main Drafters <ul> <li>12 Circuits per Drafter</li> <li>2 Drawings per Circuit</li> <li>4 Photos per Drawing</li> </ul> </li> <li>Additional Circuit Images provided by TU Dresden (from Real-World Examinations, Drafter 0)</li> <li>Additional Circuit Images provided by RPTU Kaiserslautern-Landau (Drafter -1)</li> <li><strong>248.020 </strong>Bounding Box Annotations</li> <li><strong>40.711</strong> Rotation Annotations</li> <li><strong>1.437</strong> Mirror Annotations</li> <li><strong>85.417</strong> Text String Annotations (equals <strong>93.74%</strong> completeness)<br> <ul> <li><strong>289.850</strong> Text Characters</li> <li><strong>98</strong> Character Types (Upper/Lower Case Latin, Numbers, Special Characters)</li> </ul> </li> </ul> </li> <li><strong>320</strong> Binary Segmentation Maps<br> <ul> <li>Strokes vs. Background</li> <li>Accompanying Polygon Annotation Files</li> <li><strong>22.929</strong> Polygon Annotations</li> </ul> </li> <li><strong>59 </strong>Object Classes</li> <li><strong>Scripts</strong> for Data Loading, Statistics, Consistency Check and Training Preparation</li> </ul>