Interactive 3D plot not working properly with 32 bit images

Posted by Stein Rørvik on Oct 06, 2015; 1:57pm
URL: http://imagej.273.s1.nabble.com/Interactive-3D-plot-not-working-properly-with-32-bit-images-tp5014559.html

Hello,

I am trying to use the Interactive 3D Surface Plot (which is a great tool) to visualize the geometry of a physical 3D surface. The data originally comes from a laser scanner. I am using the XYZ2DEM plugin to create a 32 bit image from an XYZ point cloud from the scanner. The 32-bit image represents the Z height as a function of XY. This works fine, but for some reason the Interactive 3D Surface Plot fails to plot the data if I apply any other LUT than greyscale. Please see the two attached images; the only difference is the LUT. For the colored LUT, the plot is always flat. Please note that the images are spatially calibrated. All numbers (XY and Z) represent physical meters. If I convert to 8 bit the 3D Surface Plot works, but the Z axis represents then values from 0 to 255 even when the image is properly spatially calibrated. I need all three axes to show the physical dimensions, either as m or mm.

So, does anyone know a workaround for the inability to plot 32 bit data with a LUT, or is it a bug that can easily be fixed?

Stein

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