Mailing List Archive: Off topic: - imagemagic command line, strange behaviour

Off topic: - imagemagic command line, strange behaviour

Dec 28, 2023, 6:46 PM

Post #1 of 3 (75 views)

I'm trying to remove grey background from a pdf file, but on windows.
The document contains some grey scale fonts that I want to retain.

Running on windows, via Command line:
magick convert -density 300 document.pdf -fuzz 45% -fill white +opaque black converted_document.pdf

Works, the text is retained including grey-scale font.

But running same command from a bat file, the grey-scale font is removed.

@echo off
cd "C:\Users\Server\Desktop\"
magick convert -density 300 document.pdf -fuzz 45% -fill white +opaque black converted_document.pdf
pause

--
Thelma

Re: Off topic: - imagemagic command line, strange behaviour [ In reply to ]

ml at floga

Jan 3, 2024, 8:09 AM

Post #2 of 3 (70 views)

Permalink

On 2023-12-28 19:46, thelma@sys-concept.com wrote:
>@echo off
>cd "C:\Users\Server\Desktop\"
>magick convert -density 300 document.pdf -fuzz 45% -fill white +opaque black converted_document.pdf
>pause

Just a wild guess without looking too deep into it: Might the "%" be a
special character in a Batch file, being interpreted as some sort of
variable? Can you escape it, maybe putting the whole "45%" in quotes?

Kind regards

FloGa

Re: Off topic: - imagemagic command line, strange behaviour [ In reply to ]

thelma at sys-concept

Jan 3, 2024, 10:56 AM

Post #3 of 3 (69 views)

Permalink

On 1/3/24 09:09, Florian Gamböck wrote:
> On 2023-12-28 19:46, thelma@sys-concept.com wrote:
>> @echo off
>> cd "C:\Users\Server\Desktop\"
>> magick convert -density 300 document.pdf -fuzz 45% -fill white +opaque black converted_document.pdf
>> pause
>
> Just a wild guess without looking too deep into it: Might the "%" be a special character in a Batch file, being interpreted as some sort of variable? Can you escape it, maybe putting the whole "45%" in quotes?
>
> Kind regards
>
> FloGa

I got this one.
Yes, you are correct changing "45%" to "45%%" solved the problem.