PRINT コマンドを使って画像のピクセルでサイズを指定するにはどうすればよいですか?
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MathWorks Support Team
on 17 Feb 2014
Answered: MathWorks Support Team
on 17 Feb 2014
出力ファイルをピクセルで指定する必要があります。Image Processing Toolbox がないため、IMRESIZEコマンドが使用できません。
Accepted Answer
MathWorks Support Team
on 17 Feb 2014
PAPERPOSITION プロパティを変更し、PRINTコマンドで解像度を指定することで実現できます。下記に、コマンドの実行例を紹介します。
surf(peaks)
% control the image pixel size by manipulating the paper size and number of dots per inch
output_size = [500 300];%Size in pixels
resolution = 300;%Resolution in DPI
set(gcf,'paperunits','inches','paperposition',[0 0 output_size/resolution]);
% use 300 DPI
print('test.png','-dpng',['-r' num2str(resolution)]);
% now read the image back in to MATLAB and test its size
a=imread('test.png');
size(a)
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