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Re: Converting a magnified image of a line to a single

• To: mathgroup at smc.vnet.net
• Subject: [mg130600] Re: Converting a magnified image of a line to a single
• From: Bob Hanlon <hanlonr357 at gmail.com>
• Date: Thu, 25 Apr 2013 02:53:24 -0400 (EDT)
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• References: <20130417063041.7376E6A61@smc.vnet.net>

>From Details and Options section of documentation page for SelectComponents
(http://reference.wolfram.com/mathematica/ref/SelectComponents.html):

"For the complete list of possible properties, see the reference page for
ComponentMeasurements."

The link in this sentence for ComponentMeasurements goes to

http://reference.wolfram.com/mathematica/ref/ComponentMeasurements.html

with the properties listed under Details and Options.



Bob Hanlon




On Wed, Apr 24, 2013 at 7:01 AM, Joerg Roesgen <biophys.hershey at me.com>wrote:

> This command SelectComponents has the form
> SelectComponents[m,"prop",crit]. I can't find any list of properties
> corresponding to "prop." Any ideas?
>
> Thanks,
> J=F6rg
>
>
> On Apr 20, 2013, at 05:41 , Dave Waddell wrote:
>
> > I tried converting the result image to a graph so that I could apply a
> > moving average and then fit a B-spline through it. As you can tell I'm
> new
> > to Mathematica:
> > data = ArrayRules@SparseArray@ImageData[result]
> > It was all downhill after that. Another nudge would be appreciated.
> > Thanks, Dave.
> >
> > Dave,
> >
> > On 4/17/13 1:30 AM, Dave Waddell wrote:
> >> I have a magnified image of a 0.1mm line here:
> >> http://www.d-a-v-e.org/images/Trace.jpg
> >> ... this converts with Binarize very well:
> >> http://www.d-a-v-e.org/images/Trace%20binary.jpg
> >> ... but what I would like to do is convert it to a single pixel wide
> > smoothed line running right up the middle. Any suggestions or pointers on
> > how to do this in Mathematica would be appreciated.
> >> Dave
> >>
> >
> > The sequence below seems like a good start.
> > The documentation for the functions should help you understand what is
> going
> > on in more details:
> >
> > trace = Import["http://www.d-a-v-e.org/images/Trace.jpg";]
> >
> > b = ColorNegate@Binarize[trace];
> > b2 = SelectComponents[b, "Area", -1];
> > b3 = FillingTransform@b2;
> > dt = ImageAdjust@DistanceTransform@b3;
> > result = ColorNegate@Image[WatershedComponents[dt], "Bit"];
> > HighlightImage[trace, result]
> >
> >
> > Matthias Odisio
> > Wolfram Research
> >
> >
> >
>
>
>

• References:
  • Converting a magnified image of a line to a single pixel smoothed
    • From: Dave Waddell <dwwaddell@gmail.com>