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How can I plot an image in matlab. This is giving me a Black png image!

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URL ='http://structures.wishartlab.com/molecules/HMDB00126/image.png'
filename='test.png'
urlwrite(URL,filename)
[y,z]=imread(filename,'png');
figure, imshow(y);
colormap(z)
This is giving me a Black image! How can i Plot it without getting all black?

Risposta accettata

sixwwwwww
sixwwwwww il 5 Dic 2013
Modificato: sixwwwwww il 5 Dic 2013
you can do it as follows:
URL ='http://structures.wishartlab.com/molecules/HMDB00126/image.png'
filename = 'test.png'
urlwrite(URL,filename)
y = imread(filename, 'BackgroundColor', [1 1 1]);
figure, imshow(y);
The problem here was to replace transparent pixels with some specific color. If we don't choose any specific color then MATLAB gives it black color
  1 Commento
Tejas Waje
Tejas Waje il 10 Gen 2017
If I have a background image and I need to use a foreground image with some part transparent , what should I do?

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Più risposte (1)

barbara anderson
barbara anderson il 15 Apr 2020
Convert it into greyscale image and plot it.

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