IBlur
Function
This blurs the image, with the amount of blur being multiplied by a second
control image. Therefore, where the second image is white, you will have
maximum blur, and where it is black, you will have no blur. Here is an
example. I position an image of a man onto my background (Move2D1).
I take that and flip it with FlipReflect (a Move2D). I then
take a LumaKey and IMult it with a Ramp to get my
IBlur control image. This image is used to set the amount of blur
on the reflection. Where the image is black, there is no blur. The third
image below is the reflection with no blur, the last image has the IBlur.
 |
IMult1:

|
|
|
Parameters
|
Type
|
Defaults
|
Function
|
controlImg |
image
|
|
The second image is the control image for
the blur. Its brightness determines how much blur occurs in the first
image. |
x/yPixels |
float
|
0, xPixels |
The amount of blur as described in Pixels,
ie 200 will blur 200 pixels to either side of the current pixel. |
spread |
int
|
0 |
This tells shake to consider outside of the frame or not.
0 = Compute within the frame
1 = Compute outside of the frame
Because of the infinite workspace, it is sometimes handy to compute
outside of the frame as well, for example, if the IBlur is
placed after a Scale command. Note that if nothing is outside
of the frame (ie, black), you will see a black edge.
|
x/yFilter |
string
|
"gauss" |
Jump
to Filter Types |
steps |
int
|
5 |
This is the amount of steps. The intensity
of the control image is divided up X amount of zones, with X being
equal to steps. |
stepBlend |
float
|
1 |
This controls the blending between the
amount of regions (see below). If you put this at 0, each step will
have a constant blur value. If this is 1, there is a continuous blend
between the different regions. |
controlChannel |
string
|
"a" |
The channel of the second image to use
to control the amount of blur. |
channels |
string
|
"rgba" |
The channels of the first image to blur. |
invert |
int
|
0 |
Inverts the controlChannel. |
Synopsis
image IBlur(
image img,
image controlImg,
float xPixels,
float yPixels,
int spread,
const char * xFilter,
const char * yFilter,
int steps,
float stepBlend,
const char * controlChannel,
const char * channels,
int invert
);
Script
image IBlur(
img,
controlImg,
xPixels,
yPixels,
spread,
"xFilter",
"yFilter",
steps,
stepBlend,
"controlChannel",
"channels",
invert
);
Command Line
shake -iblur image xPixels yPixels spread etc...
See Also
PercentBlur, About
Masking |