New answers tagged images
Create a digital signature of the picture combined with you name etc. Then embed the signature into the picture using steganography. Then release it using a share alike licence. If you find it on another site with a claim that it is there work, you can now prove that it is yours.
Well... adding a watermark can be done in may ways. You could even do it manually with some external editor like gimp. I'd like to address your main concern (as I understand it): "so that no one uses the screenshots." This you will not be able achieve easily. Placing a water mark will not prevent someone from pasting their (bigger logo) on top of ...
Use Shutter - Feature-rich Screenshot Tool best tool for screenshot and screenshot related work. if you are online then you can go with This
There are many ways doing it, some of them are, Try Phatch its walk-through tutorial is here Try aPhoto. It can help your add watermarks easily. Hope it helps.
I don't know what do use package...But if you want to create a distro either Live or not, you can use splashy application and put your picture, it uses frame buffer : https://alioth.debian.org/projects/splashy/
Image->Flatten File->Export Edit->Undo ~/Documents$ file Untitled.png Untitled.png: PNG image data, 640 x 400, 8-bit/color RGB, non-interlaced
Your problem is that you don't understand the output of the file command. I used Paint.NET to save an image as 32-bit PNG, 24-bit PNG, and 8-bit PNG. Then I ran the file command on them: $ file *bit.png 08-bit.png: PNG image data, 800 x 600, 8-bit colormap, non-interlaced 24-bit.png: PNG image data, 800 x 600, 8-bit/color RGB, non-interlaced 32-bit.png: ...
NOTE: If you're looking for 16-bits per channel support then this answer applies to that. Otherwise if you're miss understanding 24-bit support (8-bit * 3 colors (RGB) = 24-bits, then see @cjm's answer as to how to understand how that works. From the GIMP FAQ: excerpt When can we see 16-bit per channel support (or better)? For some industries, ...
On Ubuntu you can use evince for this. Right click the file and select open with → Document Viewer instead of the default Image Viewer (Eye-of-gnome). Unfortunately evince does not have an option to easily move from one document to another...
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