How to get Greek letters in text in an IMAGE using Inserttext?
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Hi I want to use text with Greek letter in an image (use text as part of the image) using "Inserttext" as suggested by Mathworks. But I cannot get Greek letters there, since Interpreter (latex) is not one of this function's properties. What can I do? This is the code I use (I have to use sprintf):
imgOut = insertText(imgOut, [10 100], sprintf(['a=' num2str(i,'%0.4f \alpha') ],i))
Note: I tried \alpha or \\alpha but it did not work either. Thank you.
Steven
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Walter Roberson
el 14 de Jun. de 2016
You will need to render the character to a file or to an array, and then insert that array into the image.
Up to and including R2014a (but not later), you can work like this. Caution: this uses some magic smoke to do the job!
%use the decimal unicode character number, but only a subset is supported
%the use of HTML is documented magic... documented somewhere or other
%but you have to be aware it does not work for edit or text uicontrols
h = uicontrol('style', 'push', 'String', '<HTML>α');
%now shrink the size to just what is needed to contain the letter
%there is some slinky stuff about Extent working differently on different operating systems
%so you might need to fiddle a bit.
set(h, 'Position', get(h, 'Extent'));
%now use twice-magic incantations to render the uicontrol to an array
alpha_img = getPrintImage(handle(h));
Now you can store alpha_img as needed into the image you are building up.
If you do this for a number of different characters, you can re-use the same uicontrol and set its String differently. You should expect that the Extent will vary from character to character if you are using a proportional font.
Más respuestas (1)
Greg Dionne
el 13 de Jun. de 2016
0 votos
Not sure what version of MATLAB you have, but you can try unicode.
Does char(945) work for you?
sprintf('%s',char(945))
3 comentarios
Steven
el 14 de Jun. de 2016
Walter Roberson
el 14 de Jun. de 2016
The support for inserting unicode was not until at least R2014b.
Steven
el 14 de Jun. de 2016
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