how to create 1 in zeros matrix, in order to convert oblique line, which's plotted in x and y coordinates

Question

Osama Tabbakh 2019-3-4

0
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https://ww2.mathworks.cn/matlabcentral/answers/448152-how-to-create-1-in-zeros-matrix-in-order-to-convert-oblique-line-which-s-plotted-in-x-and-y-coordi

回答： Vijaya Lakshmi Chagi 2019-3-13

I have a line, which's rotated in random angle, but I want this line in an image (0-1) that's why I scaled the points (Leiter) in x and y coordinates in this way:

Line =

0.0418 0.0599 0

0.0417 0.0578 0

0.0415 0.0557 0

0.0413 0.0536 0

0.0411 0.0515 0

0.0409 0.0494 0

0.0407 0.0473 0

0.0405 0.0452 0

0.0403 0.0431 0

0.0401 0.0410 0

0.0399 0.0390 0

0.0397 0.0369 0

0.0395 0.0348 0

0.0393 0.0327 0

0.0391 0.0306 0

0.0389 0.0285 0

0.0387 0.0264 0

0.0385 0.0243 0

0.0383 0.0222 0

0.0382 0.0201 0

x_image = round(((((Line(:,1)*100)-1)*(100-1)/(7-1))+1));

y_image = round(((((Line(:,2)*100)-1)*(100-1)/(7-1))+1));

im = zeros(100);

for i = 1:20

im((y_image(i,1)),(x_image(i,1)))=1;

end

but I don't have a line not anymore, but points

could someone help me?

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Answer 1

Vijaya Lakshmi Chagi 2019-3-13

0
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/448152-how-to-create-1-in-zeros-matrix-in-order-to-convert-oblique-line-which-s-plotted-in-x-and-y-coordi#answer_365132

Hi Osama,

You can try using the interp1 fucntion rather than rounding off the values. This fucntion interpolates the points based on the query points(sampling over the range of x)