Composite two images with different sizes without cropping. (solved)

[Montfrooij]

Hello,

I'm using IM 6.9.3-6 on a Windows 10 X64 machine, using the command line.

I would like to add a watermark to the bottom right position of my image AND do a resize.
I did try and find a solution but so far none of the existing questions were giving the desired result.

What I've achieved so far is doing the resize:

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convert source.jpg -resize "681^>"  -quality 70% -strip  target.jpg

This works perfectly, resizing the image based on the short side and saving it with the desired quality and strip the 'overhead' (metadata).

Now I would like to add a watermark to the bottom right of this image.
This watermark is a png with a fixed size of 380 x 87.

I found this command and tested it

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composite  -dissolve 25% -gravity south source.jpg wm.png target.jpg

It does add a watermark, but the size of target.jpg is now 380 x 87 (essentially cropping the rest of the souce image).

Somebody suggested to add -resize "1x1<" after the composite to disable resizing, but that did not work either.

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composite -resize "1x1<" -dissolve 25% -gravity south source.jpg wm.png target.jpg

So my first 'problem' is getting the composite to result in the 'source' image size.
Two other 'problems' I have to fix as wel are the location of the watermark (south is not bottom, right) and do both actions in one command.

Thanks in advance for your help!

Peter

[GeeMack]

I would like to add a watermark to the bottom right position of my image AND do a resize. [...] Two other 'problems' I have to fix as wel are the location of the watermark (south is not bottom, right) and do both actions in one command.

Try this using just the "convert" command...

Code: Select all

convert ^
   source.jpg ^
   -strip ^
   -resize "681^>" ^
   wm.png ^
   -compose dissolve ^
   -define compose:args=25 ^
   -gravity southeast ^
   -geometry +20+20 ^
   -composite ^
   -quality 70 ^
      target.jpg

That starts by bringing in your background image, stripping the metadata, and resizing it as you like.

Then you bring in the watermark image which will be overlaid on the background.

After that you select a compose method of "dissolve".

Using "-define compose:args=25" you specify that it will composite the watermark at 25% opaque.

The "-gravity southeast" tells the command to place the watermark in the lower right corner.

If you want the watermark up and away from that corner you can use something like "-geometry +20+20" to move it up 20 pixels and over 20 pixels from the corner.

Now with all those details specified you "-composite" the watermark over the background image.

Set the JPG quality at 70%, name the output image, and you're done.

[Montfrooij]

Thanks a lot!
Looks like you've solved my problems at once!


Peter