Hi Isabella,
To acheive the specific image fit, you will need to make sure the figure's size and the image's aspect ratio are correctly configured.
Here is how you can acheive it:
1. Setting up the figure sizes
width_cm = 25.4; % The desired width in cm
height_cm = 21.2; % The desired height in cm
width_in = width_cm / 2.54; % Convert width from cm to inches
height_in = height_cm / 2.54; % Convert height from cm to inches
figure;
set(gcf, 'Units', 'inches', 'Position', [0, 0, width_in, height_in]);
imgData = rand(212, 254); % Example image data
imshow(imgData, 'InitialMagnification', 'fit'); % Display the image
axis on; % Show axes, which you might want to turn off with 'axis off'
2. Adjusting the Axes and Figure
set(gca, 'Unit', 'normalized', 'Position', [0 0 1 1]); % Make axes fill the figure
set(gcf, 'PaperPositionMode', 'auto'); % Match printing to figure size
3. Saving the image and viewing it using "printpreview" function
Note: Given that 1 inch = 25.4 mm, and you want each pixel to correspond to 1 mm, a resolution of 25.4 DPI should theoretically give you 1 pixel per mm. However, printers and viewing software might handle this differently, so you may need to adjust this value.
% To save to a file, for example, a PNG
dpi = 25.4; % Dots per inch for 1 pixel per mm
print('-dpng', '-r25.4', 'MyImage.png'); % Adjust filename and format as needed
printpreview()
