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rough b/w line smoothing in GIMP?
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10-16-2019, 03:10 PM
hi,
so, how's the rough/pixelated line smoothing in GIMP? I just got done trying to use Corel PaintShop - do I have to paint a smooth line? doesn't seem to work very well on black/white line drawings. thanks 
10-16-2019, 03:50 PM
Can you show an example? As rule you don't smooth things after the fact, with the right method you create smooth lines directly.
(10-16-2019, 03:50 PM)Ofnuts Wrote: Can you show an example? As rule you don't smooth things after the fact, with the right method you create smooth lines directly. I imported a simple black/white drawing into Corel PaintShop Trial that I want to increase the resolution and smooth the 96 dpi lines in. It increased the resolution but did nothing to feather the lines. It was supposed to blend the selected foreground with the white background. Didn't seem to work. Can I select the lines (creating a layer), feather it (border increase), paint the layer and then merge it all? The drawing has to be in PDF/A - I heard that GIMP exports to PDF but had no info on what type of PDF so I asked. Corel PaintShop doesn't open or save PDF's so I'm looking for another PhotoEditor till I can't find a better one. thanks
10-17-2019, 08:14 AM
(This post was last modified: 10-17-2019, 08:20 AM by rich2005.
Edit Reason: edit
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Quote:..It increased the resolution but did nothing to feather the lines. It was supposed to blend the selected foreground with the white background. Didn't seem to work. It is as Ofnuts wrote. Really you should start off in a suitable format. Changing the resolution - pixels per inch / ppi / aka dpi - that only changes the print size, the important bit, the image size is not changed. All in one screenshots: https://i.imgur.com/dxXFnmH.jpg 1. Scale the image, Image -> Scale Set Width/Height to 400% then X/Y resolution to 2. That gets a larger image size with a little bit of antialiasing. 3. If that is not enough, apply a little bit of blur Filters -> Blur -> Gaussian Blur 4. Then use the curves tool Colors -> Curves to (hopefully) improve. Quote:The drawing has to be in PDF/A - I heard that GIMP exports to PDF I think that spec. is often used with CMYK printing. You need to ask the printing company (usually a PITA) Gimp will export a vanilla PDF in bitmap (raster) form ie. Text is flattened to an image. If you need to set up a mixed page of image + text and PDF/A you need Scribus. https://www.scribus.net/ Otherwise Try LibreOffice Draw. Part of https://www.libreoffice.org/ Set up a user page size, import the scaled up image & set to size. Save as a PDF/A, as screenshot: https://i.imgur.com/NjGg106.jpg
10-17-2019, 08:30 AM
If one try make a pixel drawing smooth there is a plugin GMic QT / Repair / smooth (Anisotropic) :
original : QMic Qt : result (make duplicate layer and multiply with first layer:  (10-17-2019, 08:14 AM)rich2005 Wrote: Otherwise Hi Rich2005, I opened my Draw to test this PDF / A-2B option. But I didn't find it. Then I noticed that my version was 4.1.3. I downloaded the latest version, 4.1.7, but still didn't have this option for exporting PDFs.  I was about to ask you which version you use when ... I realized you were talking about LibreOffice, but I use OpenOffice.  Taking advantage then, is there much difference between these two packages (Libre Vs Open)? I thought LibreOffice had been discontinued. Thank you in advance.
10-17-2019, 02:05 PM
When LibreOffice split from OpenOffice there was a period when it was a bit basic but now for (years) most things better. Some say compatibility with MS Office is better in OpenOffice.
However, you can have both, for Windows try out the portable version https://www.libreoffice.org/download/portable-versions/ Just given it a try in a Win10 VM and it is all there. Exports that PDF/A It is a big package just for that option but the LO Draw part sometimes useful for vector/PDF editing. |
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