| Emboss |
Function
With the Emboss function, you control the gain and light direction.
Note: The Emboss function converts your image to a BWA image (since there is no color information).
If you do an extreme gain, you may start to see terracing on your image. To correct this, insert a Bytes node before the Emboss node, and boost your image to 2 bytes per channel. You can get interesting patterns with a Bytes node set to 2 bytes, followed by a Blur node, and then the Emboss node. The elevation is set to 30 because it makes the median grey value .5.
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Parameters
|
Type
|
Defaults
|
Function
|
| gain |
float
|
10 | The amount of emboss. |
| azimuth |
float
|
45 | The direction of the light. 0 and 360 means from the right side of the image, 90 means the top, etc |
| elevation |
float
|
30 |
This is the "height" of the light. 0 means parallel to the image, 90 means the same axis as a line from your nose to the image. Assuming you are facing the image, I guess. |
Synopsis
image Emboss( image, float gain, float azimuth, float elevation );
Script
image = Emboss( image, gain, azimuth, elevation );
Command Line
shake -emboss gain azimuth elevation