high fideility photo tracing help

Post questions on how to use or achieve an effect in Inkscape.
LT72884
Posts: 40
Joined: Wed Mar 20, 2013 2:04 am

high fideility photo tracing help

Postby LT72884 » Sun Mar 24, 2013 2:45 pm

Ello everyone. For those who have read my last thread, i asked my friend what the feature in cs6 illustrator was called. He showed me and it is called live trace. You select live trace and then the option for high fidelity photo/image. It will open a dialog box and you can add noise and other features to it. He took a photo of mine from my canon power shot camera and used the live trace feature. the photo after the live trace, looked exactly like the original but now it could be scalled to any size without any lose.

How do i accomplish this in inkscape? he was able to do it in like 5 seconds. the photo size is 3750x2789(180ppi) and was shot with a 5 mega pixle camera.
I try to use the tracebitmap feature BUT in my last thread i stated that slowed my pc down so much it took 5 minutes to move the traced image so i could delete the original. haha. In illustrator on his laptop, it ddnt even phase it. haha

thanks

If inkscape cant do it, what open source program can?

I OWE YOU ALL ONE.

EDIT

Inkscape is doingome weird stuff. I opened up the image in gimp to resize it and set the ppi. I use the scale feature and change the default values of the picture from 18 inches by 10 inches to 5 inches by 3.7 inces (900 x 675 pixles) and i keep the same 180ppi. save it as a jpg and import it into inkscape. Inkscape says the image is 900 x 675 px but en i switch it to inches, it reads it as 10 x 7.5 which means the PPI changed to 90 or so rather than staying at the 180 i specified.... so wth is inkscape doing to me. haha If i try to use the extenions>raster>resample option, it brings up values of 3750x2789 even though i saved the photo in gimp as a 5x3.7 with 180ppi. so i try to resample it at 180 and it looks way bad. Totally lost t why it isdoig this. It is 1 am here and my eyes hurt, that may be the problem. haha

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brynn
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Re: high fideility photo tracing help

Postby brynn » Mon Mar 25, 2013 10:24 am

Well, all I know is that Inkscape does not have any feature like that. And honestly, this is the first I've ever heard about this. I thought it was basically impossible to reproduce a raster image perfectly, or even nearly perfectly as a vector image. I guess there's a reason why AI costs so much :lol:

Maybe someone else will have a clue about that. I'm actually tempted to search the internet myself, but don't quite have time right now. But you could search while waiting for someone else to answer.

Oh! Well someone of our members kind of tweaked Trace Bitmap a little bit (couple years ago) so that it seems to handle colors and details better than TB. It's posted in Inkscape Resource subforum, iirc. I don't remember the exact title of the topic, but pretty sure it has "Trace Bitmap" in the title. And I think a multiple page topic, iirc. Sorry, I wish I had more for you. Again, I'm a little rushed at the moment, but I'll bet someone else either remembers, or has time to find it (if you can't). But it still will not accurately reproduce a photo.

And one last comment. That sounds really like a very sophisticated, professional grade kind of feature (actually sounds almost miraculous!). I will be shocked if there exists an open souce project like that. Although, believe me, I certainly have plenty of "shocked" smileys, in case it does exist :lol: But I think this is a case where a proprietary graphics feature is well worth the money, at least imo :D

v1nce
Posts: 696
Joined: Wed Jan 13, 2010 4:36 am

Re: high fideility photo tracing help

Postby v1nce » Mon Mar 25, 2013 10:44 am

> If i try to use the extenions>raster>resample option, it brings up values of 3750x2789 even though i saved the photo in gimp as a 5x3.7 with 180ppi

If it can recover the pixel size, then chances are you only reset the meta and not set the actual size of your photo.

It's very uncommon to get an uneven size (2789) for an image.
Plus you can't get a 3750*2789 (=10MB) with a 5MP camera.

There're no predefined profiles in inkscape like there are in CS6 perhaps default settings are so that inkscape try to keep too much details so the output is quite big (and difficult to handle).
What were the settings in CS ? Was it a BW / color trace ?
Try to increase speckle size in options of trace bitmap to see if it helps


> If inkscape cant do it, what open source program can?

http://autotrace.sourceforge.net/ is a bit like potrace (internal inkscape tracing tool) but with less good result (according to potrace author)


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