Legacy ImageMagick Discussions Archive

Yes, I update ImageMagick to a recent version and solved my problem.

Thanks

Version: ImageMagick 6.7.7-10 2014-03-06

Platform: Linux - Ubuntu

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My result:



My code: Why is different?

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yes, it looks fine.. Sorry, bad example :/

With the next images, you can see the differences.

input:


mask:


Thanks

The same :/

Mask image:


Input image:

Hi,

I want apply a mask to an image. (image and mask have the same dimensions)

input.png (grayscale)
mask.png

I used the next code:

convert input.png mask.png -alpha off -compare CopyOpacity -composite out.png

The mask was applied correctly, but the out.png lost the grayscale (obviously), i ...

Thank you ;)

After your answers, my solution:

1 - convert in.png to RGBA

2 - I did a loop and i change the alpha values.
For example:
for i, j in zip(range(255+1), list(reversed(range(255+1)))):
(i,i,i,j)
(255,255,255,0)
(254,254,254,1)
(253,253,253,2)
...

Thank you ;)

Hi,

how can I add a transparency gradient in a grayscale to an image which already have background transparent?

For example: white color -> 70% transparent
gray -> 40% transparent
etc -> etc

http://i57.tinypic.com/2mgnsdh.png

Thanks