Alessandro Polverini on wrote...
| Hello,
| I'm starting using imagemagick and after a lot of tests I finally
| managed to reach the goal I needed.
|
| But I'm creating 2 intermediate files and I would like to know if it's
| possible to "optimize" the steps I do and maybe avoid the temporary
| images: I'm getting a lot of difficulties to understand the command line
| syntax!
|
| These are the steps I actually do, given as input a color and two
| images: src1.jpg and src2.png (this one with transparency)
|
| 1) create an image of the same size of src1 filled with color:
| convert src1.jpg +matte -fill "#RRGGBB" -colorize 100% tmp1.gif
|
| 2) blend the two :
| composite -compose multiply tmp1.gif src1.jpg tmp2.png
|
| 3) and finally put all together
| composite -compose atop src2.png tmp2.png output.jpg
|
| The thing works fine but I would be pleased to know if it's possible to
| eliminate one or also both the steps so to optimize things and beginning
| to learn advanced use of the command line.
|
It should be very posible to do all the steps in one command.
But before I do, what is the 'multiply' step trying to achieve.
It is it just a dimming of the image to a specific color, why not
just use -colorize directly.
Also why use 'atop' which as your starting image is JPEG, there is no
transparency involved, so it is equivelent to a 'over' the default
composition operation.
An example image or explaination what your actually want, prehaps with
small sample images, would be helpful.
In any case here is YOUR commands as a single command.
Note multiply is associative, image order does not matter when that are
the same size.
convert src1.jpg \( +clone +matte -fill "#RRGGBB" -colorize 100% \) \
-compose multiply -composite \
src2.png -compose atop -composite output.jpg
I can not test this without sample images.
Note also that I read each image once only, so it is posible to read the
images from a pipeline, or network source.
Anthony Thyssen ( Graphics Enthusiast ) <[EMAIL PROTECTED]>
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but a thousand words use a lot less disk space!
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