Questions and postings pertaining to the usage of ImageMagick regardless of the interface. This includes the command-line utilities, as well as the C and C++ APIs. Usage questions are like "How do I use ImageMagick to create drop shadows?".
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When looking for vectorization process, I found a software called mkbitmap
by Peter Selinger. It's function is for creating bitonal image as an input for potrace. The following is what the sotware can do :
Thresholding without highpass filter
Thresholding with highpass filter
Are there an equivalent function in ImageMagick especially the one with highpass filter?
Because those function will be useful for creating coloring book for my student by using pre-existing color images.
mkbitmap man page
OS: Windows 7 Ultimate, 32-Bit
CPU: Intel Core i3 2350M @ 2.30GHz
RAM: 2.00 GB Single-Channel DDR3 @ 665MHz
IM Version: 6.8.3-8 2013-03-04 Q16
Features: DPC OpenMP
Delegates: bzlib fontconfig freetype jng jp2 jpeg lcms lzma pango png ps tiff x xml zlib
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This works reasonably well for me on your original color image. Lines are a bit more discontinuous than in your other software.
Code: Select all
convert loxie-orig.png -negate -separate -lat 5x5+5% -negate -evaluate-sequence add loxie_edge.png
http://www.imagemagick.org/script/comma ... ns.php#lat
you can play around with the arguments to try to tweak it better.