2D editor / Blur & sharpen

Unsharp Mask
Version: for Dig. Cam. / for 3D Users
menu access: Edit / Filters / Blur & sharpen

This functions makes details appear more clearly on a blur image. Edges are detected and settings reveal them more or less.

Radius Radius in pixels of the convolution kernel.
When a pixel belongs to an edge, pixels around it are modified if they are inside the convolution kernel.

Sigma

The greater the value the greater the contrast on both sides of an edge. Image saturation can result from big value.
Filtered / initial image blending

Resulting image is the blend of initial image with filtered image. A value equal to:

  • 0 %: resulting image is the blend with 0% of the filtered image and 100 % of the initial image.
  • 50 %: resulting image is the blend with 50% of the filtered image and 50 % of the initial image.
  • 100 %: resulting image is the blend with 100% of the filtered image and 0 % of the initial image.
Threshold under which effect is applied

Threshold corresponds to a difference needed, between the initial image and the filtered image.
If difference is below the value set, filtered pixels are put in the resulting image. If difference is above the value set, initial pixels are put in the final image.
Filter is applied to whole pixels of the final image when threshold is egal to 0.
Threshold value is generally between 2 and 20 to keep image quality.

Blur
Version: for Dig. Cam. / for 3D Users
menu access: Edit / Filters / Blur & sharpen

This functions blurs image

Radius

Radius in pixels of the convolution kernel.
Increasing radius results in increasing blur amount.

Sigma

Sigma modifies the coefficients distribution inside the convolution kernel.
Low value generates a gradient blur effect around a given pixel.
High value involves an uniform blur effect around a given pixel.

Gaussian Blur
Version: for Dig. Cam. / for 3D Users
menu access: Edit / Filters / Blur & sharpen

This functions blurs image. Generated blur is soft and very similar to a photographic blur.

Median
Version: for Dig. Cam. / for 3D Users
menu access: Edit / Filters / Blur & sharpen

This filter reduces blur resulting of a camera movement. Each pixel is replaced by the median value computed from the pixels around it.

Radius Radius of the circle used to computed the median value around a pixel.