Generate gray scale image which contains non overlapping triangle.

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Amrita Singh 2020-9-27

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https://ww2.mathworks.cn/matlabcentral/answers/600574-generate-gray-scale-image-which-contains-non-overlapping-triangle

评论： Rena Berman 2020-10-8

Generate gray scale image of M×N having a border around it which contains n-non overlapping right angle triangle.As shown in below figure.Afterwards Image size become M+2*border×N+2*border.

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Rik 2020-9-28

Start by learning C or assembler. That way you can avoid all built-in functions, including plus and subsref.

Do you have a clear description of the functions you want to avoid? And why? To challenge yourself?

Rena Berman 2020-10-8

(Answers Dev) Restored edit

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回答（1 个）

Image Analyst 2020-9-27

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https://ww2.mathworks.cn/matlabcentral/answers/600574-generate-gray-scale-image-which-contains-non-overlapping-triangle#answer_501076

在 MATLAB Online 中打开

Try poly2mask():

binaryImage = false(M, N);
for k = 1 : numTriangles
    x = rand(3, 1);
    y = rand(3, 1);
    thisMask = poly2mask(x, y, M, N);
    binaryImage = binaryImage | thisMask;
end
imshow(binaryImage);

It should be really trivial for you to adapt it to make sure the triangles are right triangles. Just make sure 2 of the x's are the same and 2 of the y's are the same.