I need Help with bitmap tracing artifacts

Post questions on how to use or achieve an effect in Inkscape.
scotfree
Posts: 2
Joined: Wed Oct 29, 2008 11:52 am

I need Help with bitmap tracing artifacts

Postby scotfree » Wed Oct 29, 2008 12:31 pm

Hello, I'm trying to convert a black and white colored .gif to .svg using the bitmap tracing feature but I'm having a little problem. I've followed step by step a you tube tutorial created by FWWSWW (Transform your image into a vector-Inkscape) which worked but for some reason it causes curves and corners to become boxy, rugged, and a little choppy there's also gray areas that should be black. If the gray areas where black it would look perfectly fine. Does anyone have any suggestions (which requirements I should increase/decrease in the window) or maybe another opensource solution.

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brynn
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Re: I need Help with bitmap tracing artifacts

Postby brynn » Wed Oct 29, 2008 9:00 pm

Hi scotfree,
Welcome aboard!
I can't answer your questions, but I'm thinking that those who can, might need to see a screen shot, or some other visual example of what the problem is. I do know that the trace bitmap feature is quite flexible, and think it's probably possible to get what you want, once you learn which settings you need to address. Good luck :D

Simarilius
Posts: 626
Joined: Wed Jun 06, 2007 2:37 am

Re: I need Help with bitmap tracing artifacts

Postby Simarilius » Wed Oct 29, 2008 9:07 pm

knowing what settings you have currently would help.

scotfree
Posts: 2
Joined: Wed Oct 29, 2008 11:52 am

Re: I need Help with bitmap tracing artifacts

Postby scotfree » Fri Oct 31, 2008 4:24 am

Thank you for your concern here's the settings I used

Mode: Single Scan: Creates a Path
Brightness cutoff on Threshold: 0,450
Edge detection off Threshold: 0,650
Color quantization off Threshold: 8
Invert Image off

Multiple Scans: Creates a group of paths
Brightness steps off Scans: 185
Colors: on
Grays: off
Smooth:off Stack Scans:on Remove Background:on

Options: Options
Suppress Speckles:on
Smooth Corners:off
Optimize Paths:on

zials
Posts: 25
Joined: Sun Sep 28, 2008 12:22 am

Re: I need Help with bitmap tracing artifacts

Postby zials » Fri Oct 31, 2008 6:34 am

The original image is black&white? Simply select the "brightness cutoff" in the 'single scan' section, and set the Threshold to 0.9 (The brightness cutoff threshold tells inkscape what shades it should include, 0 = keep everything white ... 1 = everything black... putting at 0.9 will make almost every visible thing black, leaving only the extremely light colours untouched)
Hit OK, and you should have your results.

If the image is still too rough and blocky, you can select the traced-shape and go to Path -> Simplify (Ctrl + L) to smooth the image a little bit.


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