Legacy ImageMagick Discussions Archive

snibgo wrote: ↑2018-10-16T16:52:14-07:00distort.c has an explicit test for values less than 0.1, throwing an error:

Thanks for looking it over. I'll make sure to use other methods in cases where it might be an issue.

Using ImageMagick 7.0.8-12 Q16 x64 HDRI (and ImageMagick 6.9.10-11 Q16 x64 HDRI) on Windows, trying to set a scaling factor as described at THIS link . I enter these three commands, and the third one results in an error... magick logo: -set option:distort:scale 0.11 -distort SRT 0 test.png magick ...

Anyone able to help here? Version: ImageMagick 6.8.9-9 Q16 x86_64 2017-07-31 - Linux Inline FX expressions like "%[fx:w+h]" work almost everywhere in IM7 commands, but they only work properly in a few IM6 operations. Fortunately you can use FX expressions in IM6 with the "+distort" operator, which ...

I run a batch script to modify images in folders and subfolders in windows. It works great, but it runs imagemagick for every single image in the folders. Is there a way to limit the files that are modified to a time period eg. a week from date modified? As the others have mentioned, you'll ...

I have another question. In above command how can I fill with gradient instead of solid color and again with preserving alpha? You can use "-sparse-color" to add a gradient fill to the red, green, and blue channels of the input image while keeping the transparency of the alpha channel. A simple ...

Again the result was the same. It fills the whole of image to that color like following: Try the same thing only instead of "-alpha off" just work it with the RGB channels like this... magick icon.png -channel RGB -fuzz 50% -fill "#550000" -opaque "#000000" -alpha on icon2.png

I am trying to batch edit my files and save them as their original names using the code: magick convert *.tif -colorspace gray -threshold 50% -compress Group4 -set filename:f %t "%[filename:f].tif" But, they are all saved under the first tif name as almost a pdf, with all of the image combined into ...

Yes 1/3, 1/3 , 1/3 would be good I think so. If you could give me the command I can adapt it in case I would like to change the proportions. In the example commands above there's a section inside parentheses. That's where you're creating the mask for the gradient overlay. You can use FX expressions ...

I am on IM7 on OSx: convert --version Version: ImageMagick 7.0.8-11 Q16 x86_64 2018-09-08 https://www.imagemagick.org The command that you gave me does not work, I suppose it's related to IM7? If you're using IM7 you should be using the command "magick" instead of "convert". This command is nearly ...

digcollib wrote: ↑2018-09-28T08:29:54-07:00Any tips on what this is or why it is happening?

You need to end your command with the name of the output file you're writing to.

That does it. Thanks very much for all your help. Keep in mind when using FX expressions directly within an operation like... ... -level "%[fx:mean<0.5?100:0] ... ... it will run that expression separately on every image in the list, or on each page of the PDF. But if you set that variable before ...

One last issue - the level command seems to cause a problem with the anti-aliasing. I noticed the output pdf has reduced image dimensions and file size. Not sure why? When IM reads in a PDF it defaults to a density of 72. Try setting the density before reading the input file, maybe 150 or 300 ...

I wondered if I could store the mean at the start somehow, I tried: magick input.pdf -channel RGB -set option:mw "%%[mean]" -level "%%[fx:mw<0.5?100:0]%% -white-threshold "%%[fx:mw<0.5?85:100]%%" output.pdf IM won't let you set a variable like that and use it inside another FX expression, but you ...

I'm getting an error: convert: invalid argument for option '-level': %[fx:mean<0.5?100:0]% @ error/convert.c/ConvertImageCommand/2003. Try using just "magick" instead of "magick convert". When you add "convert" to the command it will take on IM6 behavior. You need it to act like IM7 to make those ...

In a batch file I'm using: magick convert %1 -alpha deactivate -negate -white-threshold 85%% "%~dpn1_negated%~x1" which inverts all the pages of the input.pdf to the output.pdf Using IM7 offers various approaches, but you should be using just "magick" instead of "magick convert" to use its full set ...