How do I make text color black when using the function insertText
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fadams18
el 3 de Feb. de 2020
Comentada: Image Analyst
el 4 de Feb. de 2020
Hello I created a white image using the code below. and then i inserted a text. but the text has yellow background. I dont know where this is coming from
N=500;
M=500;
whiteImage = 255 * ones(N, M, 'uint8');
DD= insertText(whiteImage, [100,234],'Hello World','FontSize',18,'TextColor','black');
imshow(DD);
Please help, how do I remove the yellow background under the text
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dpb
el 3 de Feb. de 2020
Read the rest of the documentation...
'BoxColor' — Text box color
'yellow' (default) | character vector | cell array of character vectors | [R G B] vector | M-by-3 matrix
Use
DD= insertText(whiteImage, [100,234],'Hello World','FontSize',18,'TextColor','black','BoxColor','white');
It seems a more logical 'Default' choice would be the existing background color of the image, but I guess that's probably more difficult to ascertain...
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Image Analyst
el 4 de Feb. de 2020
Depends on whether you want to do a weighted average of the images, or if you want to do masking. You're doing masking where you'll set the underlying image to pure black wherever your other image is equal to 1. Try it and see if this is what you want. I would probably suggest a weighted sum though, like 0.7 of one image plus 0.3 of the other image.
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Image Analyst
el 3 de Feb. de 2020
It comes from the 'BoxColor' option. See the documentation. To have background be white:
N=500;
M=500;
whiteImage = 255 * ones(N, M, 'uint8');
DD= insertText(whiteImage, [100,234],'Hello World','FontSize',18,'TextColor','black', 'BoxColor', 'white');
imshow(DD);
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