Change pixels to mm in axes

조회 수: 5 (최근 30일)
Eliska Paulikova
Eliska Paulikova 2023년 3월 3일
댓글: Eliska Paulikova 2023년 3월 3일
Hello, I have an image, I know that 1 pixel is 0.14mm. But if I plot some points from the image. The axes is in pixels. But I would like to have it in mm. How can I do it? Thank you so much

답변 (2개)

Simon Chan
Simon Chan 2023년 3월 3일
Read about function imref2d

DUY Nguyen
DUY Nguyen 2023년 3월 3일
Hi Eliska, you can try this code:
% Load image
I = imread('your_image.bmp');
% Define conversion factor
conversion_factor = 0.14; % mm/pixel
% Get size of image
[M, N] = size(I);
% Create spatial referencing object
ref = imref2d([M N],conversion_factor,conversion_factor);
% Plot points on millimeter-scale axis
imshow(I, ref);
  댓글 수: 3
Eliska Paulikova
Eliska Paulikova 2023년 3월 3일
Eliska Paulikova
Eliska Paulikova 2023년 3월 3일
I was trying to use imred2D function, but as you can see I have a problem here. I don't know what to do with a table

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