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Importing Point Clouds with RBG color values...

Posted: Tue Aug 12, 2014 4:16 pm
by AndrewRoberts
I have a point cloud of a section of coastline which I derived from a digital elevation model. I also have a satellite image of this section of coastline as well. I am attempting to append the R,G,B colour values of the satellite image to the points such that when I mesh the points in Cloud Compare, it displays as a three dimensional satellite image.

I am appending the color values of the satellite image in ArcGIS by using...
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As seen here in the attributes table...
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I import the ascii table into Cloud Compare...
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When it is imported into Cloud Compare it does show some features like roads and towns but it doesn't have the same color that the original satellite image had...
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Is this even possible? Is there a much easier way to do this? Or am I asking to much of the software?

THANKS!
-Andrew

Re: Importing Point Clouds with RBG color values...

Posted: Tue Aug 12, 2014 5:30 pm
by daniel
I wonder about the rgb values in the exported ascii table: is there any value above 64? Or even 128? Colors seem very dark. This is generally a sign that the rgb values have not been exported between 0 and 255 (as CC is excepting). If this is the case, two choices:
  • either find an option in ArcGIS to export the value between 0 and 256
  • or use the 'Edit > Color > Levels' tool in CC to boost the color spectrum (but it would be a bit too late as you would have already lost some information).

Re: Importing Point Clouds with RBG color values...

Posted: Tue Aug 12, 2014 6:18 pm
by AndrewRoberts
The values in the table are between 45-166.

This is what I would want the colors to look like.
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**Edit:
I'll have to mess around with Arc to see if I can export it differently.

Re: Importing Point Clouds with RBG color values...

Posted: Thu Aug 14, 2014 8:34 am
by daniel
That's weird, because 45-166 seem to fit perfectly in 0-255 (and not 0-128 or 0-64 ;). Have you tried to use the Edit > Colors > levels tool? (just set the 45-166 interval as input).