Example of Stacho's tracing of contours. Original RGB map scan (72 dpi) was
oversized to 360 dpi (less dpi could be enough) and converted to greyscale by
Channel Mixer (R -max, G +max, B +max, Monochrome checked) both in Photoshop or
GIPM. One should play with Constant in Photoshop or with histo
>> Generally it does between 0 and 5 extra points then stops, sometimes with
the last point at an acute angle to the general trend of the line.
>what about manually edit line points and press "Continue tracing"?
Sometimes that worked for me. Unless there is a 'trick' it seems easier to
just draw
reasonably fat well
lined drawings? (your example line looks about 4-5 pixels wide)
Bruce
_
From: therion-bounces at speleo.sk [mailto:therion-boun...@speleo.sk] On Behalf
Of Stacho Mudrak
Sent: Thursday, 7 June 2012 10:55 p.m.
To: List for Therion users
Subject: Re: [Therion] xthe
On 8.6.2012, at 0:18, Bruce wrote:
>>> Generally it does between 0 and 5 extra points then stops, sometimes with
> the last point at an acute angle to the general trend of the line.
>
>> what about manually edit line points and press "Continue tracing"?
>
> Sometimes that worked for me. Unless
It worked well to digitize contours on a topographical map - the reason why
I wrote this code, but for muddy cave sketches, it was completely useless.
This was the reason, why I gave it.
And I do not think that digitizing pocket-topo sketches is a good idea,
when pocket topo is vector already. May
On 7.6.2012, at 22:50, Bruce wrote:
> Generally it does between 0 and 5 extra points then stops, sometimes with the
> last point at an acute angle to the general trend of the line.
>
what about manually edit line points and press "Continue tracing"?
m.s.
-- next part
wow, that's a cool feature! I didn't know XTherion can do that.
It's true that Inkscape can't do line tracing. It has a "trace bitmap"
feature (based on potrace) which does trace filled shapes, but this is
pretty useless for tracing cave drawings.
Cheers,
Thomas
Stacho Mudrak wrote, On 06/0
On 7.6.2012, at 12:54, Stacho Mudrak wrote:
> P.S. Ad Inkscape - I have been playing a lot with raster -> vector features
> of Inkscape, but ended with programming my own digitalization tool in
> xtherion. Inkscape was not designed to be used this way.
Way? You may use it exactly as xtherion.
I am afraid, there are no instructions :(
I needed it to convert raster surface contours to vector data, to be able
to generate 3D model.
You need to load a background image. Then - on a raster line - add firt two
points of line, their distance defines tracing step. Like this:
[image: Inline ima
Are there any instructions regarding Xtherion's 'trace line' and 'convert to
curve' line editing features?
I expect there are - just cannot find them.
The 'convert to curve' seems to take a line with straight segments and
converts it to a smooth curve, so perhaps not so complicated.
I have not
On 7.6.2012, at 2:42, Bruce wrote:
> The âconvert to curveâ seems to take a line with straight segments and
> converts it to a smooth curve, so perhaps not so complicated.
>
Inkscape
m.
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