Roadway Sign Data Collection

Video log image data collection

QA/QCDatabaseGIS spatial analysis and presentation, and mapping

GeoTranSolution (GTS) Automatic sign recognition

Reports

Image pattern recognition

Geometrical optics computation

Object Geo-referencing

Successive image superposition and validation

GIS data Integration

(Aerial photos; video log images;

geodatabase)

Image Processing Algorithm

Color Segmentation

ROI Extraction

Sign Detection

Sign Recognition

Sign Extraction

Image containing speed limit Processed binary image after color segmentation

Final speed limit extraction

Automatic Sign Extraction