magickUnsharpMaskImage method

Future<bool> magickUnsharpMaskImage({
  1. required double radius,
  2. required double sigma,
  3. required double gain,
  4. required double threshold,
})

MagickUnsharpMaskImage() sharpens an image. We convolve the image with a Gaussian operator of the given radius and standard deviation (sigma). For reasonable results, radius should be larger than sigma. Use a radius of 0 and UnsharpMaskImage() selects a suitable radius for you.

This method runs inside an isolate different from the main isolate.

  • radius: the radius of the Gaussian, in pixels, not counting the center pixel.
  • sigma: the standard deviation of the Gaussian, in pixels.
  • gain: the percentage of the difference between the original and the blur image that is added back into the original.
  • threshold: the threshold in pixels needed to apply the difference gain.

Implementation

Future<bool> magickUnsharpMaskImage({
  required double radius,
  required double sigma,
  required double gain,
  required double threshold,
}) async =>
    await _magickCompute(
      _magickUnsharpMaskImage,
      _MagickUnsharpMaskImageParams(
        _wandPtr.address,
        radius,
        sigma,
        gain,
        threshold,
      ),
    );