Question: adding watermark

[Khalid Motawi]

What is the best way to add watermark to image using ImageJ?

I use two images the original image and the watermark image. The problem
(in watermark image)is that I cannot change the opacity of the text without
changing the opacity of the background.
Note: the background transparency is 100% if I did not change opacity of
the text


Best regards

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[Gabriel Landini]

On Friday 01 Mar 2013 15:05:44 you wrote:
> What is the best way to add watermark to image using ImageJ?

One easy way: Average 2 versions of the same image, one the original, the
other with a white or black (or any other colour) watermarking text. The
result will be the semi transparent in the text part, while the original
elsewhere.

BTW, watermarks can be removed. That is particularly easy when they appear in
the same place across images. So it is not a robust way of making something
copy proof (if that is what you want it for).
Cheers

Gabriel

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[Khalid Motawi]

Thanks a lot Gabriel for your help. But it seems you talk about ImageJ as
an application. It is my fault my question was not clear enough. I use
ImageJ java library inside my java project, and I cannot make watermark
using ImageJ classes and methods.

On Sat, Mar 2, 2013 at 12:25 PM, Gabriel Landini <[hidden email]>wrote:

> On Friday 01 Mar 2013 15:05:44 you wrote:
> > What is the best way to add watermark to image using ImageJ?
>
> One easy way: Average 2 versions of the same image, one the original, the
> other with a white or black (or any other colour) watermarking text. The
> result will be the semi transparent in the text part, while the original
> elsewhere.
>
> BTW, watermarks can be removed. That is particularly easy when they appear
> in
> the same place across images. So it is not a robust way of making something
> copy proof (if that is what you want it for).
> Cheers
>
> Gabriel
>
> --
> ImageJ mailing list: http://imagej.nih.gov/ij/list.html
>

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