I understand that you want to print image to landscape PDF with minimal margins while maintaining the aspect ratio. As you mentioned, you have already tried using the '-fillpage' option, but it did not help. To address this issue, you can try incorporating the following changes in the code snippet, which sets the 'PaperPositionMode' option for the figure and adjusts the 'Position' attribute for the axes.
mf = figure;
imshow(thisImg);
set(mf, 'PaperOrientation', 'landscape');
set(mf, 'PaperUnits', 'inches');
set(mf, 'PaperSize', [11 8.5]);
set(mf, 'PaperPositionMode', 'manual');
set(mf, 'PaperPosition', [0 0 11 8.5]);
set(gca, 'Position', [0 0 1 1]); % ensure the image fills the entire figure
print('test', '-dpdf', '-r0'); % use '-r0' for maximum resolution
In the above code, '-r0' format option is being leveraged to specify the screen resolution.
Have a look at the below references for better understanding
I hope this helps.
