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better controls for volume rendering volumes with small scalar ranges #3128

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slicerbot opened this issue Mar 12, 2020 · 2 comments
Open

better controls for volume rendering volumes with small scalar ranges #3128

slicerbot opened this issue Mar 12, 2020 · 2 comments
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@slicerbot slicerbot commented Mar 12, 2020

This issue was created automatically from an original Mantis Issue. Further discussion may take place here.

@lassoan lassoan added this to the Slicer 4.11.0 milestone Mar 20, 2020
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@lassoan lassoan commented Mar 20, 2020

When loading an image that has a small scalar range (e.g., this MRHead image rescaled to 0.0-1.0 range) then Shift slider in volume rendering module has incorrect min/max range by default (very large range compared to the scalar range of the volume). The range is fixed when transfer functions are modified (e.g., any of the points are moved in scalar opacity transfer function).

Probably an initial update of the slider range is missing.

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@lassoan lassoan commented Mar 26, 2020

@cpinter could you have a look? You've fixed this and it almost works perfectly, it seems to be just a small initialization bug.

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