Introduction In this post we repeat the ‘Experiment 02’ with the difference of generating high resolution images. We refer to high resolution as objects with a major axe about 136 pixels and a minor axe of 68 pixels (bigger ellipsoid in the image). We maintain the AR=2. We set scale with 136 pixels equivalent to 6 mm, simulating in …
Etiqueta: shape analysis
Hole analysis in image processing
Introduction In this post we want to propose the use of image processing in order to perform a complete hole analysis in porous materials. As fas as we know, features like structure, size and shape of holes become very important to define the acoustic behavior (ie. acoustic absorption) in all these kind composited materials. The …
How the image resolution affects the results?
Introduction How can the image resolution affect the statistical results on an image processing application? On your left you can observe the same object (an ellipsoid, AR=2) with different resolutions. Low resolution presents a major axe of 12 pixels and high resolution object is about 80 pixels. It seems to be evident (see previous posts, …
Number vs. Volume weighted distributions
Introduction As it was explained in a previous post, we ask the reader to present both number and volume weighted distributions for a three-particle composed material, with the following settings: A-type: high-resolution elliptical particles with major-axe of 12 mm, AR=2 B-type: high-resolution elliptical particles with major-axe of 10 mm, AR=3 C-type: high-resolution elliptical particles with major-axe of …
Number vs. Volume distributions
Introduction In this post we will analyze number vs. volume weighted distributions in a material composed by two different kinds of (synthetic) particles. In the image on the left we can check the differences between number and volume weighted particle size distributions for the same sample. As the number weighted shows how material is composed …
Synthetic samples
The synthetic microstructure generator is a script written in Matlab code and developed by Mark Tschoop. At this moment, the last updated version is November 2009. By means of this tool we can generate a binary image with non-overlapping ellipses of varying sizes and distributions. It was originally developed to examine the influence of particle aspect ratio, area fraction, and …
Environment definition
To start with the analysis of the shape of paticles in composite materials (let’s say this experiments Particle Shape Analysis, PSA) first we do need to define the most proper environment (Integrated Development Environment, IDE) to facilitate our experiments. In most of the cases this IDE is integrated by both, hardware and software elements. In …
Analysis of synthetic ‘rice kernels’ (low resolution)
Introduction In this post we will analyze a synthetically generated image (with Matlab) that contains objects (ellipsoids) very similar to rice kernels. As we will see, the low image resolution will result on a bad feature extraction and, consequently no valid conclusions can be extracted at the end… Individual objects We approximate the 2D projection of a …