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This module implements 1D noise reduction filters. There are currently two available:
median filter
rolling average with threshold
median(data, windowSize)
data
: An array of numbers.
windowSize
: The size of the window over which the median is applied.
Should be an odd number greater than one, defaults to 3
.
var median = require('filters').median;
var raw = [ 2, 3, 4, 9, 6, 2 ];
console.log(median(raw));
// => [ 2, 3, 4, 6, 6, 2 ]
average(data, windowSize, threshold)
data
: An array of numbers.
windowSize
: The size of the rolling average window. Should be two or
greater, defaults to 3
.
threshold
: Maximum difference between two numbers for the average still to
be applied. Use this to smooth out small variations but large varitions
through immediately. The difference between /a/ and /b/ is calculated as
/(max(a, b) - min(a, b)) / max(a, b)/. No default.
var median = require('filters').average;
var raw = [ 2, 3, 4, 9, 6, 2 ];
console.log(average(raw, 3, 0.5));
// => [ 2, 2.5, 3, 9, 7.5, 2 ]
MIT
FAQs
1D noise reduction filters
The npm package filters receives a total of 41 weekly downloads. As such, filters popularity was classified as not popular.
We found that filters demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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