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Questions tagged [decimation]

10 questions
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1 answer

How to use PyMeshLab to reduce number of faces to a guaranteed specific number

I have a 3D triangular mesh in PyMeshLab that I want to decimate to a certain number of faces. The number of faces after decimation is not guaranteed - which is a problem for me. I need a specific number of faces. I'm currently using…
tommyp
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Decimation doesn't seem to work even though all requirements are met

I've been trying everything to get decimation to work in chart.js but don't seem to be able to even though i've met all the requirements mentioned here (at least I think I have):…
M4sterShake
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Initialize triangular mesh in e.g. VTK based on np array with coordinates of vertices and np array with triangles

Could you tell me how do I initialize triangular mesh based on np array with coordinates of vertices and np array with triangles (it contains triples of indices of vertices from first array)? Could be done in VTK or any other Python library, the…
aaxx
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Mongodb large time series decimation / query improvments

I have a time series collection for sensors data like…
DaminouTav
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Difference of Cooley Tukey-Gentleman Sande and DIT-DIF

Newbie here. I want to ask for NTT Implementation. We know there are several options like Cooley-Tukey, Gentleman-Sande, and Stockholm. Also, there's something called Decimation in Time (DIT) and Decimation in Frequency (DIF). As long as I know, the…
noc
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How to Expand or "scale up" an 1d array?

I have a piece of C code that can only handle an array of size 20. The array that my instrument outputs is much smaller than what the function requires. Is there a numpy or math function that can "scale up" an array to any specific size while…
Buck Stuck
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Meshlab Crashing when running Remeshing, simplification - Quadratic Edge Collapse Decimation

Good morning, I have imported a .3ds and a .obj file into Meshlab and need to reduce the amount of faces. I do this usually and with no problem in the past using the Quadratic Edge Collapse Decimation function in filters. Mesh lab has all of a…
Michael Hardiman
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MeshLabServer - Simplification : Quadric Edge Collapse Decimation (WITH TEXTURE) Failure

I test some decimation / simplification tools to reduce triangles number of many OBJ files who represent a 3D model programmatically. I have a problem with the function "Simplification: Quadric Edge Collapse Decimation (with texture) in…
Clement
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Algorithm for reducing 1D function to polyline with small number of points

Problem My input is 1D function y = f(x) and I want to find a way to approximate this function with a polyline with small number of points on some given interval : What have I tried: I solved this by making polyline with many points (1000+)…
Jan Spurny
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How can i make 16000Hz sample from 44100Hz sample in a real-time stream?

I use portaudio in a Cpp work. My signal model treats the only 16000Hz audio input and When the First released my work, I don't need to use 44100 sample rate. It was just about 48000Hz microphone. So I resampled my signal like 48000 -> 16000 ->…
sanghyun park
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