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YCbCr

Noise generator

This filter generates noise in an image. Available noise types are

  • Poisson noise
  • Gaussian noise
  • Uniform noise
  • Laplace noise
  • Lorentz noise
  • It is possible to generate (YCbCr) luminance noise only and to apply a gamma correction.

    General description

    This filter noisifies an image with different types of noise. For each noise type it's specific values can be set. These are

Wavelet sharpen

The wavelet sharpen plugin enhances apparent sharpness of an image by increasing contrast in high frequency space. The amount of unsharpness of the original image can be taken into account by adjusting the sharpening radius. As an option you can choose to sharpen the luminance (YCbCr) channel of the image only.

Wavelet denoise

The wavelet denoise plugin is a tool to reduce noise in each channel of an image separately. The default colour space to do denoising is YCbCr which has the advantage that chroma noise can be reduced without affecting image details. Denoising in CIELAB (L*a*b*) or RGB is available as an option. The user interface allows colour mode and preview channel selection. The denoising threshold can be set for each colour channel independently.

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