00730327

Component

https://doi.org/10.1177/0361198196152600118

https://scholar.google.co...ston&publication_year=1996

This paper presents the recent efforts in developing an image processing algorithm for computing a unified pavement crack index for Salt Lake City. The pavement surface image covers a pavement area of 2.13 m (7 ft) x 1.52 m (5 ft), taken at every 30-m (100-ft) station. The digital images were then transferred onto a 1-gigabyte hard disk from a set of memory cards each of which can store 21 digital images. Approximately 1,500 images are then transferred from the hard disk to a compact disc. The image-processing algorithm, based on a variable thresholding technique, was developed on a personal computer to automatically process pavement images. The image is divided into 140 smaller tiles, each tile consisting of 40 x 40 pixels. To measure the amount of cracking, a variable threshold value is computed based on the average gray value of each tile. The program then automatically counts the number of cracked tiles and computes a unified crack index for each pavement image. The crack indexes computed from the image-processing algorithms are compared against the manual rating procedure in this paper. The image-processing algorithms were applied to process more than 450 surveyed miles of Salt Lake City street network.

This paper appears in Transportation Research Record No. 1526, Emerging Technologies in Geotechnical Engineering.

English

p. 142-148

1996

Transportation Research Record

0309062209

Figures (6) ; Photos (1) ; References (42) ; Tables (1)

Algorithms; Alternatives analysis; Automation; Condition surveys; Cracking; Defects; Image analysis; Image processing; Manual control; Pavement cracking; Pavement distress; Pavements; Ratings

Salt Lake City (Utah)

Salt Lake City (Utah)

Highways; Pavements; I23: Properties of Road Surfaces

TRIS, TRB

Dec 30 1997 12:00AM

• ANALYSIS OF ANCHOR MOORING LINES IN COHESIVE SEAFLOOR
• BACKCALCULATION OF PAVEMENT PROFILES FROM SPECTRAL-ANALYSIS-OF-SURFACE-WAVES TEST BY NEURAL NETWORKS USING INDIVIDUAL RECEIVER SPACING APPROACH
• DETERMINATION OF INTERNAL DEFORMATION FIELD IN ASPHALT CORES USING X-RAY COMPUTER TOMOGRAPHY
• DEVELOPMENT OF COMPUTER VISION TECHNIQUE FOR IN SITU SOIL CHARACTERIZATION
• DIGITAL IMAGING TECHNIQUES FOR ASSESSMENT OF HOMOGENEITY OF GRANULAR MATERIALS
• DIGITAL-IMAGE-BASED COMPUTER MODELING AND VISUALIZATION OF CEMENT-BASED MATERIALS
• EARTH PRESSURES DUE TO COMPACTION: COMPARISON OF THEORY WITH LABORATORY AND FIELD BEHAVIOR
• ESTIMATION OF DYNAMIC PROPERTIES OF SAND USING ARTIFICIAL NEURAL NETWORKS
• EVALUATING CLAY MICROFABRIC USING SCANNING ELECTRON MICROSCOPY AND DIGITAL INFORMATION PROCESSING
• IDENTIFYING FAILURE THROUGH LOCATIONS OF ACOUSTIC EMISSION
• LIQUEFACTION RISK ASSESSMENT: EVALUATION OF THREE STATISTICAL MODELS
• METHODOLOGY FOR CREATING DEFENSIBLE THREE-DIMENSIONAL VISUALIZATIONS
• NEURAL MODELING OF KANSAS SOIL SWELLING
• NEW APPROACH TO INTERPRETATION OF NONINVASIVE SURFACE WAVE MEASUREMENTS FOR SOIL PROFILING
• NUMERICAL MODELING OF EARTH STRUCTURES: SOME THINGS TO CONSIDER
• PERFORMANCE OF MIXED BRACING SYSTEM IN DEEP EXCAVATION OF STIFF SOIL
• RELATING FAILURE TESTS PERFORMED IN HOLLOW CYLINDER APPARATUS TO INHERENT ANISOTROPY
• RELIABILITY-BASED DESIGN OF REINFORCED EARTH RETAINING WALLS
• SITEVIEW: PRACTICAL GEOENVIRONMENTAL VISUALIZATION
• THREE-DIMENSIONAL CHARACTERIZATION OF CONTAMINANT PLUMES
• THREE-DIMENSIONAL CHARACTERIZATION WITH LIMITED DATA: AN EXAMPLE FROM PLAYA-LAKE BASIN, SOUTHEAST ARIZONA
• THREE-DIMENSIONAL IMAGE ANALYSIS OF AGGREGATE PARTICLES FROM ORTHOGONAL PROJECTIONS
• THREE-DIMENSIONAL STRATIGRAPHIC CHARACTERIZATION FOR GEOTECHNICAL EXPLORATION
• USING CONE PENETRATION TEST TO DETERMINE DRAINED FRICTION ANGLE OF SANDS