how to generate an image given 2D points coordinates and the gray intensity value

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luca antonioli
luca antonioli 2019-11-29
回答： Devineni Aslesha 2019-12-3
hello,
i have a set of 2d points, and each point has a gray value. my goal would be to generate an image from these points.
now for the plotting i'm using the command plot.
plot3(pp_cnt(1),pp_cnt(2),pp_cnt(3),'dk','MarkerFaceColor', [P2.gr_lvl(jj) P2.gr_lvl(jj) P2.gr_lvl(jj)])
each pixel should have a 0.5x0.5 dimension.points.jpg
can anyone suggest me how to procede?
how can i generate an image? how can i interpolate these points?
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darova
darova 2019-11-29
Image pixels have rows and column (coordinates). Can't you use your coordinates to fill pixels?
for k = 1:length(x)
j = round(x - min(x)); % column
i = round(y - min(y)); % row
I(i,j) = 1;
end
imshow(I)

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Devineni Aslesha
Devineni Aslesha 2019-12-3
Hi Luca
To generate an image with the given 2D point coordinates and the gray intensity value, use the imshow function in MATLAB. Also, in order to have 0.5 X 0.5 dimension for each pixel in the image, use the below code.
I = imread('Image.png');
R = imref2d(size(I), 0.5, 0.5);
imshow(I, R);
Refer to the following links for more information.
https://www.mathworks.com/help/images/ref/imshow.html#bvmnrxi-1-RI
https://www.mathworks.com/help/images/ref/imref2d.html

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