The Filter Tool contains several pre-set filters, enabling a variety of effects, from radically changing the look of an image to adding subtle randomly-generated film grain.
This drop-down control provides a selection of filter types. The options are displayed below.
- This appears to press the image into metal, such as an image on a coin. The image will appear to be bumped and overlayed on gray.
- Emboss Over
- Embosses the image over top of itself, with adjustable highlight and shadow height and direction.
- Uniformly adds noise to images. This is often useful for 3D computer-generated images that need to be composited with live action as it reduces the squeaky clean look that is inherent in rendered images. The frame number acts as the random generator seed. Therefore, the effect is different on each frame and is repeatable.
- This filter type blurs the image.
- Sobel is an advanced edge detection filter. Used in conjunction with a Glow filter, it creates amazing neon light effects from live action or 3D rendered images.
- Laplacian is a very sensitive edge detection filter that produces a finer edge than the Sobel filter.
- Adds noise to images similar to the grain of film (mostly in the mid-range). This is useful for 3D computer-generated images that need to be composited with live action as it reduces the squeaky clean look that is inherent in rendered images. The frame number acts as the random generator seed. Therefore, the effect is different on each frame and is repeatable.
The filter defaults to operating on R, G, B and A channels. Selective channel filtering is possible by clicking the checkboxes beside each channel to make them active or inactive.
Values range from 1 to 10. It proportionately increases the amount by which the selected filter affects the image. This does not apply to Laplacian filter type.
This control has a range from 0 to 315 degrees and changes the effect in increments of 45 degrees. This only applies to the Relief and Emboss filters.
Depending on which Filter Type is slected, the control may appear. It varies the Median filter's effect. A value of 0.5 will produce the true median result, as it will find the middle values. A value of 0.0 will find the minimums and 1.0 will find the maximums. Applies to the Median filter only.
This control is only visible when applying the Grain or Noise filter types. The Seed slider can be used to ensure that the random elements of the effect are seeded with a consistent value. The randomizer will always produce the same result given the same seed value.
This control is only visible when applying the Grain or Noise filter types. Select the checkbox to cause the noise or grain to change from frame to frame. To produce static noise, remove the selection from this checkbox.
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