NoiseReductionEngine class

Image noise reduction and denoising engine implemented in pure Dart.

Provides multiple denoising strategies inspired by OpenCV and Dynamsoft:

  • Gaussian blur (configurable kernel size and sigma)
  • Median filter (salt-and-pepper noise removal)
  • Bilateral filter approximation (edge-preserving smoothing)
  • Morphological operations (erosion, dilation, opening, closing)
  • Adaptive denoising with automatic strength selection based on luminosity

Constructors

NoiseReductionEngine()

Properties

hashCode → int
The hash code for this object.
no setterinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited

Static Methods

adaptiveDenoise(Uint8List gray, int width, int height, {double? luminosity, double? noiseEstimate}) → DenoiseResult
Adaptive denoising that automatically selects the best strategy based on image luminosity and noise level estimation.
bilateralFilter(Uint8List gray, int width, int height, {double spatialSigma = 2.0, double rangeSigma = 25.0, int kernelSize = 5}) → Uint8List
Applies bilateral filter approximation for edge-preserving smoothing.
dilate(Uint8List gray, int width, int height, {int kernelSize = 3}) → Uint8List
Morphological dilation: expands bright regions, fills small dark gaps.
erode(Uint8List gray, int width, int height, {int kernelSize = 3}) → Uint8List
Morphological erosion: shrinks bright regions, removes small bright noise.
gammaCorrection(Uint8List gray, int width, int height, {double gamma = 0.6}) → Uint8List
Applies gamma correction for low-light brightness enhancement.
gaussianBlur(Uint8List gray, int width, int height, {int kernelSize = 3, double sigma = 0}) → Uint8List
Applies Gaussian blur with configurable kernel size.
medianFilter(Uint8List gray, int width, int height, {int kernelSize = 3}) → Uint8List
Applies median filter for salt-and-pepper noise removal.
morphClose(Uint8List gray, int width, int height, {int kernelSize = 3}) → Uint8List
Morphological closing: dilation followed by erosion.
morphOpen(Uint8List gray, int width, int height, {int kernelSize = 3}) → Uint8List
Morphological opening: erosion followed by dilation.
unsharpMask(Uint8List gray, int width, int height, {double amount = 1.0, double blurSigma = 1.0}) → Uint8List
Applies unsharp mask sharpening.