Legacy ImageMagick Discussions Archive

Believe I figured it out, via a small trip through PPM format. I marked this thread as solved.

The solution is to make sure the lines are not Antialiased.

Thanks for response and link, snibgo

In case anyone can use the script:



## ------------ perl script for making grids ...

Desired results (simplified) showing 10px 1 and 2 px wide.


https://postimg.cc/image/bgmw7gmx7/


https://postimg.cc/image/kbnqi240r/

I have the need to programatically create a 1 bit BMP grid, meaning that I have the following parameters:


Width of file in pixel
Height of file in pixel
line width in pixel
line offset in pixel


I have done it in PerlMagick so far, but could use Imagemagick directly if need be, that's no ...

I have (FINALLY) found out how to rotate text in PerlMagick.

But the logic does not match what I expected.

First : version = ImageMagick 6.9.1-2 Q16 x86 2015-04-14 http://www.imagemagick.org

My goal is to write text vertically rotated 90 degrees clockwise.

I kind of expected the syntax to be ...

I have made a Perl script to draw vertical lines at fixed distances. Output must be 2bit BMP (bilevel).
The image size is 600 DPI fixed.

Drawing and image generation works fine, and is super fast. It's the writing that is a time killer.

An image of 15000 pixel horizontal works OK, and is done in ...

This may be necro-posting, but I had exactly the same issue, and found what seemes to cause the situation.

This does not change the image:

mogrify -pointsize 150 -fill yellow -gravity north -annotate "%t" x.jpg

But this works as expected:

mogrify -pointsize 150 -fill yellow -gravity north ...

Maybe I am mistaken about Pango vs Ghostscript. But I did not find an option to call a custom font and use that.

Will make some more trials later.

About the version - I do not know where I got it from. Will upgrade soon then. Sorry I can't be of more help.

First a great thank you to developers of IM. After I installed last update, suddenly Pango worked on Windows. WOW.

For others, this is what I have:
Version: ImageMagick 6.9.0-1 Q16 x86 2014-12-22 http://www.imagemagick.org
Copyright: Copyright (C) 1999-2015 ImageMagick Studio LLC
Features: DPC ...

@Bonzo - yes, thanks. I will do that, as an alternative.

The ImageMagick documentation is included with installations. Good !

But does an offline version of the excellent (and much much needed) examples from Anthony Thyssen exist ? Even a zipped website copy would be perfect. I don't always have online access when on the road.

According to my arithmetic, 35700 = 300x119 (not 118).
convert -size 300x119 -depth 8 gray:qwerty.raw q3.bmp
This works for me (IM v6.7.9 on Windows 7).

Snibgo - I never thanked you for the solution you gave here. This way works great.

convert -size {xsize}x{ysize} -depth 8 gray:{rawfile ...

Given that I have an image on a file, what would be a strategy to wrap that image around the center of a circle ?

Example: I have an image with text "Circumference", and would like a result like this

http://mypages.iit.edu/~smart/nortber/image001.gif

The actual application is not text, but can ...

Related to my previous post ( http://www.imagemagick.org/discourse-server/viewtopic.php?f=1&t=24069 ), I am making experiments with annotation and drawing on the image.

In principle all works. But as soon as I work with monochrome (bilevel) images, ImageMagick becomes extremely slow. I have an ...

It seems that IM doesn't generally want to create bilevel BMP files. But it will do, if the input is a bilevel PNG.

Thank you :) It's beyond my understanding why this is not working, since it's such a simple format and used everywhere in Windows + industrial machines world. Oh well.

I can ...

I have a need to create a (large) 1bit BMP file with text inside.

The file must be identical in type to this one, created using PaintShop Pro:
https://dl.dropboxusercontent.com/u/22496868/large_image_test.zip

The image identifies as
large_image.bmp BMP 3000x1200 3000x1200+0+0 1-bit sRGB 2c

I ...