Roadway Sign Data Collection Video log image data collection QA/QC Database GIS 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