Hi Everyone, I'm looking for a ImageMagick Consultant who can build me a command line command that will give me the correct dither output that I'm looking for.
Please PM me for details
THANKS!
PAID: Dither Convert
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DitherMyImages
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fmw42
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Re: PAID: Dither Convert
I don't think I can help. But have you looked at this page to see if what you need is discussed. see http://www.imagemagick.org/Usage/quantize/
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DitherMyImages
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Re: PAID: Dither Convert
Im on it right now... Im not getting the results i wantfmw42 wrote:I don't think I can help. But have you looked at this page to see if what you need is discussed. see http://www.imagemagick.org/Usage/quantize/
Thanks for the link regardless
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fmw42
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Re: PAID: Dither Convert
There are lots of different dither methods there. I was hoping that one would be what you needed.
Re: PAID: Dither Convert
It might help if you specify what you consider the 'correct' output.
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DitherMyImages
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Re: PAID: Dither Convert
dlemstra wrote:It might help if you specify what you consider the 'correct' output.
Sorry dlemstra, I was going to send over the images to someone once I heard back. Since we are laser engraving , the photo needs to be dithered in halftones , since any grayscale in the image will simply be converted by the laser driver and cause unreliable results.
The photo also needs to be between 500dpi and 1000dpi
The photo I'm posting is the unedited version and the correctly dithered version that engraves very well.
Thanks!
Last edited by DitherMyImages on 2015-04-15T04:29:25-07:00, edited 1 time in total.
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snibgo
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Re: PAID: Dither Convert
These are two different photos, most clearly seen by comparing feet. Posting the same photo before/after treatment would help.
The "after" photo also seems to be heavily sharpened.
The "after" photo also seems to be heavily sharpened.
snibgo's IM pages: im.snibgo.com
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DitherMyImages
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Re: PAID: Dither Convert
Sorry , I changed the link to the correct file...snibgo wrote:These are two different photos, most clearly seen by comparing feet. Posting the same photo before/after treatment would help.
The "after" photo also seems to be heavily sharpened.
There may be a few things going on with the image that are outside of my scope and understanding. The software we use to convert this image is designed by the laser manufacturer and they obviously do not divulge any of the algorithm. It doesn't need to be exactly the same but dither pattern works extremely well when engraved.
Thanks!
Re: PAID: Dither Convert
I couldn't reproduce your output exactly, but here are a couple of things you can try:
Code: Select all
convert original.jpg -gamma 1.5 -negate -colorspace gray -ordered-dither 6x1 halftone.jpg
convert original.jpg -gamma 1.5 -charcoal 3x2 -negate -colorspace gray -ordered-dither 6x1 charcoal.jpg