Count Grain Number from Input Image

Question

Parth Desai 2018-9-10

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/418372-count-grain-number-from-input-image

回答： AMAR P 2018-10-10

Temp.bmp

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.

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Answer 1

AMAR P 2018-10-10

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https://ww2.mathworks.cn/matlabcentral/answers/418372-count-grain-number-from-input-image#answer_340709

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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);