Directional Blur

This effect blurs the image in a specific, user-defined direction.

  • Direction: Turn the dial to indicate the direction in which the image should be blurred. The current angle is indicated in the readout next to the dial.
  • Length: Sets the distance, in pixels, that each pixel of the image will be blurred.
  • Clamp to edge: When enabled, this option ensures that the edges of the image do not become semi-transparent when the blur is rendered.

Here is an example showing the results of the directional blur:

Gaussian Blur

A simple blur which blends each pixel with the pixels surrounding it on all sides, to a radius defined by the user.

  • Radius: Sets the range, in pixels, of the blur. A radius of 10, for example, means that each pixel will have its color value averaged with all value of all pixels within a 10 pixel radius.
  • Amount Adjusts the balance of the blurred image and the source image. An amount of 100% shows only the blur, and an amount of 0 shows only the original image.
  • Mode: Sets the orientation in which the blur is calculated.
    • Both: The default option, which blurs the image both horizontally and vertically
    • Horizontal: Blurs the image left to right, calculating the blur based only on the values of other pixels to the left and right.
    • Vertical: Blurs the image top to bottom, calculating the blur based only on the values of other pixels above and below.
  • Clamp to edge: When enabled, this option ensures that the edges of the image do not become semi-transparent when the blur is rendered.

Here is an example showing the results of the gaussian blur:

Lens Blur

Replicates the blur created by a camera lens which is out of focus.

  • Radius: Sets the range, in pixels, of the blur. A radius of 10, for example, means that each pixel will have its color value averaged with all value of all pixels within a 10 pixel radius.
  • Bloom strength: Bloom boosts the brightness of the highlight areas of the image. Bloom Strength defines how much the brightness of the highlights is increased.
  • Bloom threshold: Bloom threshold specifies the brightness level above which bloom will be applied.
  • Threshold smooth: This property apples a feather to the brightness selection
  • Clamp to edge: This option forces the effect to be applied all the way to the edges of the image.

Bokeh

  • Use image: Enable this image to use your own image to define the shape of the aperture on which the blur is based. When enabled, a file picker is displayed.
    • File Picker: Select an image to define the aperture shape. The alpha channel of the selected image will be used as the shape of the lens blur bokeh.
    • Rotation: Adjusts the rotation of the selected image.
    • Stretch: Modifies the aspect ratio of the selected image, to stretch the shape horizontally or vertically.
  • Polygon sides: By default, the lens blur is calculated based on a standard aperture shape created by the software. Click any shape to select it for use. High quality lenses tend to use apertures with more sides, for a smoother blur. If you are trying to match the look of existing blur in a photo, match the number of blades in the aperture of the lens used to capture the image.
  • Curvature: Increasing the curvature adds a curve to each side of the selected polygon
  • Softness: Feathers the edges of the polygon. This will be most visible around the edges of the bloom areas.
  • Rotation: Rotates the selected polygon shape.
  • Stretch: Modifies the aspect ratio of the polygon, adjusting the horizontal and vertical dimensions of the shape independently.

Here is an example showing the results of the lens blur:

Median Blur

Median blur effectively removes pixel noise from an image, while retaining sharp edges and image detail. It functions by running a median filter on the image, then applying a blur based on the results.

  • Radius: Defines how many adjacent pixels are included in the blur result for each pixel in the image.
  • Amount: Adjusts how much of the blur result is blended with the source image.
  • Shape: Select the shape of the pixel range used to calculate the median filter.
    • Circle: Uses a circular radius of pixels, the size of which is determined by the Radius control above.
    • Square: Uses a square block of pixels, the width and height of which is determined by the Radius control above.

Here is an example showing the results of the median blur:

Rotational Motion Blur

A simulated motion blur, based on rotational movement of the layer.

  • Center: Sets the center point around which the blur will rotate. The center is also identified on the viewer as a white circle, which can be dragged to set the center position.
  • Rotation: Set the number of degrees to which the image will be blurred.
  • Amount: Adjusts the balance of the original image and the blurred image. Reducing the Amount will reveal more of the source image.

Here is an example showing the results of the rotational motion blur:

Surface Blur

Surface Blur locates edges within the layer, and applies a blur to the areas between the edges, while leaving the edge detail intact.

  • Radius: Sets the range, in pixels, of the blur. A radius of 10, for example, means that each pixel will have its color value averaged with all value of all pixels within a 10 pixel radius.
  • Threshold: Sets the level of contrast required for an edge to be recognized. Lower threshold setting will retain more of the original detail.
  • Amount: Adjusts the balance of the original image and the blurred image. Reducing the Amount will reveal more of the source image.
  • Mode: Sets the orientation in which the blur is calculated.
    • Both: The default option, which blurs the image both horizontally and vertically
    • Horizontal: Blurs the image left to right, calculating the blur based only on the values of other pixels to the left and right.
    • Vertical: Blurs the image top to bottom, calculating the blur based only on the values of other pixels above and below.

Here is an example showing the results of the surface blur:

Zoom Blur

This effect works by blurring the image outward from a specified center point. It creates a similar effect to quickly extending a zoom lens during an exposure.

  • Amount: Sets the length of the blur, as a percentage of the source image size.
  • Center: Sets the center point from which the blur will emanate. The center is also identified on the viewer as a white circle, which can be dragged to set the center position.
  • Clamp to edge: When enabled, this option ensures that the edges of the image do not become semi-transparent when the blur is rendered.

Here is an example showing the results of the zoom blur:

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Last modified: Dec 31, 2021

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