Prevent color from being applied to selected points

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gary_t
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Prevent color from being applied to selected points

Post by gary_t »

I'm fairly new to SCENE and 3D laser scanning. I've searched for an answer to this question on the forum and have not been able to find one. So my apologizes if it's been addressed already.

How to I prevent color from being applied to specific points? We do a lot of scans near busy intersections. Vehicles, of course, drive through our scene as we are scanning. Sometimes the color of these vehicles get applied to the horizontal pavement points. I've tried deleting individual photos from the stack but that doesn't seem to work. Then I noticed that the ones I was looking for were still in the 3D and planer views. I don't want to delete the actual points, just how the color is applied. Right? See attached graphic for example.

Thanks for any help you can provide this newbie.
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ChrisK
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Re: Prevent color from being applied to selected points

Post by ChrisK »

Here's one way. You could export panos both black and white and color, stack them in photoshop with the black and white layer on the bottom, delete the car from the color layer and it will replace that area with the black and white data. Then in scene I think under color options there's a replace color overlay option or something similar.
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Re: Prevent color from being applied to selected points

Post by gary_t »

Thanks. I'll give that a try. I don't have Photoshop, but I do have another program that should be able to do the same thing.
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Re: Prevent color from being applied to selected points

Post by ChrisK »

Did this end up working for you?
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Re: Prevent color from being applied to selected points

Post by gary_t »

Sorry for the slow reply. Was working on some other projects. No, I could never get the image to import back into SCENE after I edited it. Kept saying it was the wrong resolution (even though I didn't change the resolution).
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Re: Prevent color from being applied to selected points

Post by ddustin »

Gary,
Did you export it as a .bmp file?

You need to do it in the classic interface as that function is not in the new GUI.

Alternatively, we will perform double scans.
The first scan is at normal resolution and if we see a vehicle move in front of the camera, we capture a 2nd scan at a lower resolution, just for the images.
Then we replace the offending image with the clear one.
You don't need PS for this method.

David
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ChrisK
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Re: Prevent color from being applied to selected points

Post by ChrisK »

Can't believe I have never thought to do a quick low res scan to recapture images. This is a real pro tip David!
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Re: Prevent color from being applied to selected points

Post by ddustin »

ChrisK wrote:Can't believe I have never thought to do a quick low res scan to recapture images. This is a real pro tip David!
That's my job in life I guess ;)
David
EDIT: Actually you can credit Wes Grimes with coming up with this trick..
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