Method and system for evaluating aggregate digital image

Abstract

The invention discloses an aggregate digital image assessment system which comprises a motion control module, a computer module, an image acquisition module and a power supply module, an image preprocessing module, an aggregate identity module, an aggregate analysis and evaluation module and a data storage module. The assessment method includes that: a computer sends an instruction to a motion controller for controlling the linear sliding of a laser scanner; a CCD camera takes a picture of aggregate on a scanning board and transforms the image to a digital image; the digital image is transformed to a grey-scale map, And an edge detecting operator is utilized for carrying out image enhancement and restoration to the transformed grey-scale map so as to transform the grey-scale map to a binary image; the aggregate in the binary image is projected and the image of the aggregate in the binary image is detected and separated; IPP image processing and analysis software is used for calculating the three-dimensional coordinate of the surface of the aggregate; quantitative assessment category is carried out to the characteristics of the aggregate to obtain the gradation, the shape, the corner angle and the texture of the aggregate; the computer stores experimental data as well as analysis and assessment results. The aggregate digital image assessment system of the invention can be used for analysis and assessment of the aggregate.

Description

technical field [0001] The invention belongs to the technical field of road aggregate detection, in particular to an aggregate digital image evaluation system and evaluation method. Background technique [0002] At present, with the increasing mileage of expressways in our country, the damage of asphalt pavement also presents a new trend, causing huge economic losses. Due to the widespread phenomenon of overloading and overrunning, the emergence of heavy traffic such as multiple axles, heavy axle loads, and heavy wheel pressure, the non-uniform distribution of loads under the action of wheel loads will generate greater shear stress in the asphalt pavement, and the asphalt Insufficient shear resistance of the pavement surface layer is the root cause of extensive damage to the pavement. The construction practice of high-grade highways at home and abroad shows that with the increase of traffic volume and the aggravation of channelized traffic, the number of heavy vehicles incr...

AI Technical Summary

Problems solved by technology

The main disadvantage of this equipment is: when the camera takes images, it shoots from two directions, and does not shoot from the top, so it is impossible to get the relevant data of the aggregate in three-dimensional space

The disadvantage of this analyzer is that the camera shoots the aggregate from three angles, and most of the particles can be accurately determined, but it is still necessary to manually analyze and process the image to evaluate, which increases the workload of the operator and cannot evaluate aggregate surface texture

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