Module: `filters`¶

skfuzzy.filters : Subpackage for filtering data, e.g. with Fuzzy Inference by: Else-action (FIRE) filters to denoise 1d or 2d data.

`skfuzzy.filters.fire1d`(x[, l1, l2])	1-D filtering using Fuzzy Inference Ruled by Else-action (FIRE) [1].
`skfuzzy.filters.fire2d`(im[, l1, l2, ...])	2-D filtering using Fuzzy Inference Ruled by Else-action (FIRE) [1].

fire1d¶

skfuzzy.filters.fire1d(x, l1=0, l2=1)[source]¶

1-D filtering using Fuzzy Inference Ruled by Else-action (FIRE) [1].

FIRE filtering is nonlinear, and is specifically designed to remove impulse (salt and pepper) noise.

Parameters:

Parameters:	x : 1d array or iterable Input sequence, filtered range limited by `l1` and `l2`. l1 : float Lower input range limit for `x`. l2 : float Upper input range limit for `x`.
Returns:	y : 1d array FIRE filtered sequence.

x : 1d array or iterable

Input sequence, filtered range limited by l1 and l2.

l1 : float

Lower input range limit for x.

l2 : float

Upper input range limit for x.

Returns:

y : 1d array

FIRE filtered sequence.

Notes

Filtering occurs for l1 < |x| < l2; for |x| < l1 there is no effect.

References

[R29]

Fabrizio Russo, Fuzzy Filtering of Noisy Sensor Data, IEEE Instrumentation and Measurement Technology Conference, Brussels, Belgium, June 4 - 6, 1996, pp 1281 - 1285.

fire2d¶

skfuzzy.filters.fire2d(im, l1=0, l2=255, fuzzyresolution=1)[source]¶

2-D filtering using Fuzzy Inference Ruled by Else-action (FIRE) [1].

FIRE filtering is nonlinear, and is specifically designed to remove impulse (salt and pepper) noise.

Parameters:

Parameters:	I : 2d array Input image. l1 : float Lower limit of filtering range. l2 : float Upper limit of filtering range. fuzzyresolution : float, default = 1 Resolution of fuzzy input sequence, or spacing between [-l2+1, l2-1]. The default assumes an integer input; for floating point images a decimal value should be used approximately equal to the bit depth.
Returns:	J : 2d array FIRE filtered image.

I : 2d array

Input image.

l1 : float

Lower limit of filtering range.

l2 : float

Upper limit of filtering range.

fuzzyresolution : float, default = 1

Resolution of fuzzy input sequence, or spacing between [-l2+1, l2-1]. The default assumes an integer input; for floating point images a decimal value should be used approximately equal to the bit depth.

Returns:

J : 2d array

FIRE filtered image.

Notes

Filtering occurs for l1 < |x| < l2; outside this range the data is unaffected.

References

[R30]

Fabrizio Russo, Fuzzy Filtering of Noisy Sensor Data, IEEE Instrumentation and Measurement Technology Conference, Brussels, Belgium, June 4 - 6, 1996, pp 1281 - 1285.

Module: `filters`¶

fire1d¶

fire2d¶

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Module: `filters`¶