Median Calculation in Rasterize

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dmbrubac
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Joined: Sun Aug 09, 2015 2:27 pm

Median Calculation in Rasterize

Post by dmbrubac »

Would it be possible to add Median to Min, Max and Average in the Projection - Cell Height calculation?

Median should be more resilient to spikes and would be a pretty easy implementation.

Thanks!
daniel
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Re: Median Calculation in Rasterize

Post by daniel »

Easy indeed, but it would take a lot of memory (as you need to store all values to compute the median). I'll add it to the TODO list.
Daniel, CloudCompare admin
dmbrubac
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Joined: Sun Aug 09, 2015 2:27 pm

Re: Median Calculation in Rasterize

Post by dmbrubac »

Thanks Daniel

The memory impact word get worse with the increasing cell size, that's true. I rarely have more than a few hundred points in a cell, though others may have more.
luotinen
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Joined: Thu Jan 14, 2021 8:50 am

Re: Median Calculation in Rasterize

Post by luotinen »

daniel wrote: Tue Mar 22, 2016 7:33 pm Easy indeed, but it would take a lot of memory (as you need to store all values to compute the median). I'll add it to the TODO list.
Is this still on the TODO list? A median filter raster would be very useful despite the high memory requirement.
daniel
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Re: Median Calculation in Rasterize

Post by daniel »

I think it's still in the TODO list indeed.

Yes maybe memory is less an issue now (it all depends on the grid size of course)
Daniel, CloudCompare admin
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