Legacy ImageMagick Discussions Archive

I showed the command I used to generate noise in my first post. I thought that would be enough, especially if there was a way to modify the color of the noise. So yes I could process the output, but it multiplies my run time by 2 or 3. If there was a way to modify the colors in a previous step I thi...

Sorry for not being specific enough. I'm just trying to generate backgrounds to be used later in other images, just like here: http://www.imagemagick.org/Usage/backgrounds/ The basis for most of these backgrounds is a random noise image, but because I can't control the colors of this noise I always ...

I'm using Imagemagick 7.0.8-14 on ubuntu 16.04 I would like to generate random noise: magick -size 100x100 xc: +noise Random random.png but above specific colors, for instance noise over pastel colors, or reddish colors, instead of the usual RGB we get from the above command. Is there a way to do th...

magick -version only says:

Delegates (built-in): zlib

so that's indeed the problem. How do I build these libraries exactly? What is the command?

I'm using ImageMagick 7.0.8-14 on Ubuntu 16.04. I installed by downloading the tar.gz and ran ./configure --prefix /usr/local && \ make install When I try a simple command with png or jpg as an output format: convert -size 800x800 xc:white white.jpg I get the error message convert: no encode...

Perfect thanks!

yes you're right, what I meant is that the files I use as inputs are generated in real time by users, I can't ask them to write %% as it's really not human-readable, and I can't myself do tens of global searches per day to change that manually, I need everything to be automated. Is that a bug anyway...

Escaping the percent with another percent works! Although it is not very practical because my caption is read from a file, and I have lots of captions to write, potentially with lots of percent in them, I can't go throughout the file and change them all. Is my only option to analyse each $title vari...

no, double quoting does not solve the problem

I'm using ImageMagick 6.7.7-10 2016-11-29 Q16 on Ubuntu 14.04 I am using this command to add a caption to an image: convert -background black -bordercolor black -fill white -size 300x20 -pointsize $myFontsize caption:$title -trim -border 5 -channel A -fx '(lightness/2)+.8' -geometry +$myX+$myY $inpu...

Great I will test that! My IM version is 6.7.7-10 and I'm on Ubuntu 14.04 Geemack's solution is what you gave me, isn't it? Erasing the drawing instead of drawing it? Or you meant doing it by hand is going to look better? The problem in this case is that I have lots of drawings and it would take me ...

I don't know IM very well, so I didn't know whether it was possible to "pick a random black pixel" or "turn white all pixels within a radius". Your reply seems to confirm that it's possible. Any commands I should look at more precisely?

Sorry I was not specific enough in my question. I would like Image Magick to do this process all alone (even saving the multiple intermediary images). I would like to give Image Magick the final image, then it would select a random black point on the drawing, follow the line on about 10% of the tota...

Let's say I have an image like this :



I would like to produce an animation that would show the drawing as if it is drawn in real time:



Can ImageMagick help me do that?
Thanks.

Thank you all for your replies. I'm puzzled because I have just tried again the code I posted above in my first message and the numbers aren't cut anymore. Can anyone try it and confirm if they can replicate the problem? @bonzo : the problem happened with letters too @magick : there was no space bet...