Can a PNG image be displayed without displaying the black fill in the guide?
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I want to show a PNG image without a background but when I put it in the guide I fill it with the color of black
5 Comments
Answers (2)
Walter Roberson
on 6 Nov 2017
When you image() or imagesc() or imshow(), pass an option 'AlphaData' that is an array with the desired transparency, with 1 meaning to show the image completely and 0 meaning not showing the image at all (that is, show the background completely there.)
If the PNG had alpha information stored with it that you read with imread() then you should be able to use that transparency information directly.
[YourImage, ~, ImageAlpha] = imread('YourFile.png');
image(YourImage, 'AlphaData', ImageAlpha)
3 Comments
Walter Roberson
on 24 Apr 2021
Ah, in that case use image(), or use
[YourImage, ~, ImageAlpha] = imread('YourFile.png');
h = imshow(YourImage);
h.AlphaData = ImageAlpha;
Joseph Stover
on 9 Mar 2021
I was just having a similar problem and I was able to fix it by opening each png in paint.net and saving it as a 24 bit png.
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