An analysing system where modern image analysing
techniques and the computer-aided data processing have
been utilized is presented. Principles of analysing the
air porosity of concrete are described as an example of
application. In the analysis the 3-dimensional
number-based and volume-based distributions as well as
the cumulative presentation of the average distance
between pores are determined. Moreover the principles of
calculating some characteristic values of porosity are
The analysing process consists of three parts
corresponding to the progress of the computer programme.
1) Measurement stage where the 2-dimensional number-based
distribution of pores is determined by image analysis.
2) Processing stage where the 2-dimensional distribution
is transformed into a 3-dimensional distribution.
3) Output stage where the 3-dimensional number-based
distribution and some derived distributions are plotted
and calculated pore parameters are printed.
The analysis proceeds automatically from stage to stage.
The total analysis time is about 35 minutes.
|Place of Publication
|VTT Technical Research Centre of Finland
|Number of pages
|Published - 1985
|MoE publication type
|D4 Published development or research report or study
|Valtion teknillinen tutkimuskeskus. Tiedotteita
- porous materials
- image analysis
- computer aided data processing
- computers, data processing