Get Number of Grains

Hello,

Below link is having a sample program of finding grain size using line intercept method [Public_matlab_code_v1b.zip] In this sample how can I get Number of Grains present in the Input image. Example code is having one EBSD image as well, how can I convert my rgb images to EBSD so that I can use the attached example.

https://wiki.aalto.fi/display/GSMUM/Grain+size+measurement+using+Matlab

Answer 1

[AMAR P]

hi, I gave it a try. Check with the code below. There are couple of intensity transformation need to be perform to get sharp images. Furthermore, I will also suggest you to try Edge filter to enhance them.

MainImg = imread('temp.bmp');
% Convert to GrayScale Image [To perform histeq]
GrayImg = rgb2gray(MainImg);

% Intensity transformation
GrayImg = histeq(GrayImg);

% Convert to Binary Image
BinImg = im2bw(GrayImg);

%Get Region props
GrainProps = regionprops('table', BinImg,'Centroid');

% Get No of Grains in the image
NoOfGrains = numel(GrainProps);

%Read All Centers into Array
GrainCenters = GrainProps.Centroid;

% Mark Grains at Center.
figure(1);
imshow(BinImg);
hold on;
text(GrainCenters(:,1), GrainCenters(:,2),'*','Color','r');
hold off

fprintf('\nNo. Of Grains found in the Image = %d\n', NoOfGrains);

[AMAR P]

Approx 610 Grains found.