MEASUREMENT OF ROAD SURFACE TEXTURE USING PHOTOGRAMMETRY

THIS REPORT INTRODUCES A NEW METHOD OF MEASURING ROAD SURFACE TEXTURE. THE METHOD IS A STEROPHOTOGRAPHIC ONE EMPLOYING THE ELEMENTARY PRINCIPLES OF PHOTOGRAMMETRY FOR VERTICAL PHOTOGRAPHY. BY GIVING A RECORD OF THE SURFACE PROFILE IT HAS THE ADVANTAGE OVER SAND-PATCH AND TEXTURE PRINTING TECHNIQUES OF INDICATING THE SHAPE OF PROJECTIONS IN THE SURFACE AS WELL AS THEIR SIZE. THE PRINCIPLE OF THE METHOD IS OUTLINED AND A FULL DESCRIPTION OF THE APPARATUS AND TECHNIQUES IS GIVEN. THE CAMERA HAS A SINGLE LENS, THE STEROPAIR OF PHOTOGRAPHS BEING OBTAINED BY MOVING THE LENS A FIXED AMOUNT. THE PHOTOGRAPHS ARE MEASURED WITH A COMPARATOR COMPRISING ESSENTIALLY A STEREOSCOPE, PARALLAX BAR AND MOVING TABLE. ASSOCIATED ELECTRICAL EQUIPMENT ENABLES THE READINGS TO BE PUNCHED DIRECTLY ON TO TAPE FOR ANALYSIS BY COMPUTER. TECHNIQUES OF ASSESSING THE PROFILE OBTAINED BY THIS METHOD ARE DISCUSSED AND ONE APPLICATION OF THE WORK ALREADY CARRIED OUT IS DESCRIBED BRIEFLY. /AUTHOR/

• Supplemental Notes:
  • No Lr57, 21 PP
• Corporate Authors:

  MINISTRY OF TRANSPORT, LONDON (UK)

  ,    
• Authors:
  • SABEY, B E
  • Lupton, G N
• Publication Date: 1967

Media Info

• Serial:
  • Rrl Reports, Road Research Lab /UK/

Subject/Index Terms

• TRT Terms: Equipment; Information processing; Measurement; Measuring instruments; Pavements; Photogrammetry; Photography; Stereoscopic cameras; Surface course (Pavements); Texture
• Uncontrolled Terms: Profiles
• Old TRIS Terms: Photographic methods; Stereoscopic photography
• Subject Areas: Highways; Pavements;

Filing Info

• Accession Number: 00206636
• Record Type: Publication
• Files: TRIS, ATRI
• Created Date: Aug 30 1994 12:00AM