Re: Apply tiled watermark to multiple images in a single process

On Thu, Oct 11, 2012 at 3:18 PM, Bob Friesenhahn
<[email protected]> wrote:
>
> Assuming that your GM is new enough, mogrify does support a -compose
> operator and it seems to support -tile as well so maybe you can use -tile
> similar to what you are using in composite.


This morning I compiled and installed GM 1.3.16, and tried the
following mogrify commands:

gm mogrify -tile watermark.png -compose over -output-directory out
-create-directories ORIG_MAX_*.jpg
gm mogrify -compose over -tile watermark.png -output-directory out
-create-directories ORIG_MAX_*.jpg

gm mogrify -tile watermark.png -compose atop -output-directory out
-create-directories ORIG_MAX_*.jpg
gm mogrify -compose atop -tile watermark.png -output-directory out
-create-directories ORIG_MAX_*.jpg

gm mogrify -tile watermark.png -compose plus -output-directory out
-create-directories ORIG_MAX_*.jpg
gm mogrify -compose plus -tile watermark.png -output-directory out
-create-directories ORIG_MAX_*.jpg

gm mogrify -tile watermark.png -output-directory out
-create-directories ORIG_MAX_*.jpg

In every case, the images output to the "out" directory specified are
visually identical to the originals.

Thanks,
Matt Hurne

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