Gimp - 2.4 Guía Del Usuario
GNU Image Manipulation Program
418 / 653
The Motion Blur filter creates a movement blur. The filter is capable of Linear, Radial, and Zoom movements. Each of these
movements can be further adjusted, with Length, or Angle settings available.
movements can be further adjusted, with Length, or Angle settings available.
15.2.5.2
Options
Figure 15.15: ‘Motion Blur’ filter options
Blur Type
Linear Linear motion is a blur that travels in a single direction, horizontally, for example. In this case, Length means as
Radius in other filters:it represents the blur intensity. More Length will result in more blurring. Angle describes the
actual angle of the movement. Thus, a setting of 90 will produce a vertical blur, and a setting of 0 will produce a
horizontal blur.
actual angle of the movement. Thus, a setting of 90 will produce a vertical blur, and a setting of 0 will produce a
horizontal blur.
Radial Radial motion blur creates a circular blur. The Length slider is not important with this type of blur. Angle on
the other hand, is the primary setting that will affect the blur. More Angle will result in more blurring in a circular
direction. The Radial motion blur is similar to the effect of a spinning object. The center of the spin in this case, is
the center of the image.
direction. The Radial motion blur is similar to the effect of a spinning object. The center of the spin in this case, is
the center of the image.
Zoom Zoom blurring produces a blur that radiates out from the center of the image. The center of the image remains
relatively calm, whilst the outer areas become blurred toward the center. This filter option produces a perceived
forward movement, into the image. Length is the main setting here, and affects the amount of speed, as it were,
toward the center of the image.
forward movement, into the image. Length is the main setting here, and affects the amount of speed, as it were,
toward the center of the image.
Blur settings
Length Length: This slider controls the distance pixels are moved (0 - 256)
Angle Angle: (0 - 360) As seen above, Angle slider effect depends on Blur type.
Blur Center With this option, you can set the starting point of movement. Effect is different according to the Blur Type you
have selected. With Radial Type for instance, you set rotation center. With Zoom Type, vanishing point. This option is
greyed out with Linear type.
greyed out with Linear type.
Tip
You have to set the blur center coordinates. Unfortunately, you can’t do that by clicking on the image. But, by
moving mouse pointer on the image, you can see its coordinates in the lower left corner of the image window.
Only copy them out into the input boxes.
You have to set the blur center coordinates. Unfortunately, you can’t do that by clicking on the image. But, by
moving mouse pointer on the image, you can see its coordinates in the lower left corner of the image window.
Only copy them out into the input boxes.