Legacy ImageMagick Discussions Archive

Success!
I upgraded imagemagick and was able to get the one-liner Fred posted, to work.
convert -size 640x -background "rgba(0,127,255,0.75)" -gravity Center -font Nimbus-Sans-L -pointsize 18 caption:@text_file.txt final_image.png;

$ convert -version
Version: ImageMagick 6.8.6-3 2014-04-08 Q16 ...

Unfortunately, I had tried that with the other stuff (such as separately setting the alpha channel), both setting the alpha channel in "rgba" to 1, 0, and numbers in between. It appears it's a problem with my version of imagemagick.

Thanks for your time, Fred. But it didn't work for me.
Time to force an upgrade, since my distro version has reached EOL and isn't receiving updated packages.

I'm trying to generate (fully opaque) text from a file and place it on a generated semi-transparent image. Such as this:
http://i.imgur.com/HuS3goY.png

I'm trying to do this on the Command Line in Linux.
$ convert -version
Version: ImageMagick 6.7.5-6 2012-08-11 Q16 ...
...
Features: OpenMP
So ...