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

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.

can anyone suggest me how to procede?

how can i generate an image? how can i interpolate these points?

[darova]

Did you try just fill rows and columns?

I(i,j) = 1;

[luca antonioli]

hi, i don t get what you are suggesting to me.. can you explain a little better? thanks!

[darova]

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)

Answer 1

[Devineni Aslesha]

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