Count Grain Number from Input Image

Hello,

How can I calculate number of grains from metal image ? Based on grain number I want to find out input image is of which metal. Should I use line and point-sampled intercept length methods for finding number of grains.

Answer 1

[AMAR P]

hi I hope you have worked out the problem. Here is my take on a problem. Might help others in coming years.

% file: 
% Author: AMAR P.
% Version: V1

clc
clearvars;
close all;

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 Resion 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);

_ No. Of Grains found in the Image = 610_