# vtkImagePlaneWidget default lookup table is an S-curve ramp

**URL:** https://discourse.vtk.org/t/vtkimageplanewidget-default-lookup-table-is-an-s-curve-ramp/2818
**Category:** Development
**Created:** [March 13, 2020, 2:02pm UTC](https://discourse.vtk.org/t/vtkimageplanewidget-default-lookup-table-is-an-s-curve-ramp/2818 "2020-03-13T14:02:41Z")
**Posts on this page:** 1
**Page:** 1

<div class="post-metadata">

### Author: ![simonesneault](https://discourse.vtk.org/user_avatar/discourse.vtk.org/simonesneault/32/67_2.png) [@simonesneault](https://discourse.vtk.org/u/simonesneault)
#### Post date: [March 13, 2020, 2:02pm UTC](https://discourse.vtk.org/t/vtkimageplanewidget-default-lookup-table-is-an-s-curve-ramp/2818/1 "2020-03-13T14:02:42Z")

</div>

Hello,

just wanted to share that it looks strange (to me) to use an S-Curve ramp as a default in the vtkImagePlaneWidget … When setting a window level from outside, we don’t get the same image than most of the dicom viewers that uses a linear ramp to remap data (Hounsfield value in our case).

Maybe there should be an option in the vtkImagePlaneWidget itself ?

Simon