[vtkusers] vtkThreshold

[Jorge Perez]

Hello, you can use ThresholdBetween

void vtkThreshold::ThresholdBetween ( double
<https://www.vtk.org/doc/nightly/html/vtkVectorOperators_8h.html#a45c855d65dd0e2b57b08024500ff9159>
  *lower*,
double
<https://www.vtk.org/doc/nightly/html/vtkVectorOperators_8h.html#a45c855d65dd0e2b57b08024500ff9159>
  *upper*
)

Criterion is cells whose scalars are between lower and upper thresholds
(inclusive of the end values).

https://www.vtk.org/doc/nightly/html/classvtkThreshold.html#a20f1127a1da274eea9791c15410e9935

2018-03-21 8:00 GMT+01:00 Polly Pui <polly_sukting at hotmail.com>:

> Hi,
>
>
> Previously, I applied vtkThreshold with ThresholdByUpper and get the data
> extracted on 3D vtk dataset.
>
> For example, i could get 500 points out of 5000 points after the
> thresholding with a criterion of 0.085.
>
>         vtkThreshold *thresh = vtkThreshold::New();
> thresh->SetInputConnection(meanCurve->GetOutputPort());
> thresh->ThresholdByUpper(0.085);
> thresh->AllScalarsOff();
> thresh->Update();
>
> Now, my question is, how i can do this process in an opposite way.
>
> I want to get the threshold value which the number of the points are
> within 500-600.
>
> Instead of I am the one who providing the threshold value manually.
>
> //
>
> If meanCurve points 500-600 provide threshold value
>
> If meanCurve points 600-700 provide threshold value
>
> ...and so on
>
> //
>
>
> Thanks.
>
>
> Best,
>
> Polly
>
>
>
>
>
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