用MATLAB读取图片计算布氏硬度_matlab硬度换算公式-优快云博客

本文链接：https://blog.youkuaiyun.com/CQR1230/article/details/121949628

该博客介绍了如何利用MATLAB处理图像，通过灰度化、边缘检测和二值化来识别凹痕，并通过填充空洞计算其面积，进一步根据力和凹痕直径计算布氏硬度数。

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A = imread('D:\Learn\MatlabCode\Material manufacturing and technology\cailiao1.png'); % Indentation image acquired
A1 = rgb2gray(A); 
figure
imshow(A1);
threshold=graythresh(A1); 
B = im2bw(A1,threshold); % Separate the indentation from the background with the im2bw function in MATLAB
figure
imshow(B);
C = edge(B,'sobel',(graythresh(A1)*.1));
% Use strel function and imdilate function to expand the edge to fill the gaps in the edge
I = strel('line',3,90); 
H = strel('line',3,0);
D = imdilate(C,[I H]);
E = imfill(D,'holes'); % Here the imfill function is used to fill these gaps
figure
imshow(C);
area = bwarea(E);
% Here we find the diameter of the indentation, and then convert the diameter calculated in the figure to the unit we want.
d = sqrt(4*area/pi)/100;
P = 1514.65;
D = 5;
HBN = 2*P/(pi*D*(D-sqrt(D^2-d^2)));
fprintf('The Brinell Hardness Number is %f\n',HBN);

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我们需要先读取图片，然后将图片进行灰度处理，再进行边缘化和二值化处理，最后读出半径，带入施加的力后可以计算出来布氏硬度。