Legacy ImageMagick Discussions Archive

See "How crop a PDF file " 3 days ago in this forum.

I'm not a *nix guru, but I think completely removing anything from /usr/bin isn't a good idea, because other software might depend on it. Installing/deinstalling is best done with a package manager, unless you are a guru. And removing /usr/bin from your $PATH is also weird, for much the same reason....

Another useful switch is +clone or -clone, so convert doesn't have to read the same file multiple times.

Does this do what you want?

Code: Select all

# make an image totally transparent where it was white, fading to totally opaque where it was black
convert input.png -alpha on +clone -alpha off -negate -compose copyOpacity -composite -negate output.png

I suspect your old (system-wide) convert is in /usr/bin, and your newly compiled version is in /usr/local/bin. This is expected behaviour. "which convert" will tell you which one will be executed. Also look at the version numbers you get from: convert -version /usr/bin/convert -version /us...

Not that I can help, but:

1. If you ./configure more than once, you should probably "make distclean" first.

2. I made the decision a month ago to setup dual-boot Windows7/Ubuntu on my laptop, rather than hacking with Cygwin. It was worth doing.

What is that character between 100 and 60? It should be the letter x.

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convert -size 100x60 xc:none -fill red -draw 'circle 25,30 10,30' -draw 'circle 75,30 90,30' -draw 'rectangle 25,15 75,45' gel_shape.png

Then it works fine, on Ubuntu. You will need double-quotes for Windows, of course.

No, sorry. Try the MagickWand forum on:
index.php

Try the "quality" option, eg:

convert in.jpg -quality 10 out.jpg

[Posting withdrawn. I confused -l (letter L) with -1 (digit one).]

0. Please tell us your platform (Win7, Ubuntu, whatever) and IM version. 1. Software often wants frames to be in alphabetical sorted order. To get this, create your frames with leading zeros, eg 000000.jpg, 000001.jpg, ... 000009.jpg, 000010.jpg, 000011.jpg, etc. Personally, I would always prefix th...

(1) The colon (:) is to specify the format, like "rgb:" or "info:", or pseudo-images like "rose:" or "logo:". It's wrong after the filename. (2) The general rule for geometry is widthxheight+x+y. Your coordinates are in the wrong positions. Try: red=`convert $...

Ha, you've been snooping! My name is common as muck, so I use an anagram.

I needed to prep 1000 images for the web, and IM seemed the easiest solution. I've been playing with it ever since, like a new toy.

Alan Gibson.

Yes, I meant "pixel". Thanks for the correction. I tried both, then copied/pasted the wrong one.

It's a shame it sometimes returns colour names, so we need a more clumsy format to guarantee values.

See the fx documentation: http://www.imagemagick.org/script/fx.php

/usr/bin/convert 7a.png -format 'Pixel is %[fx:p{10,15}]' info:
Pixel is black
/usr/bin/convert 7a.png -format 'Pixel is %[fx:p{10,19}]' info:
Pixel is rgb(18,51,87)

Legacy ImageMagick Discussions Archive

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