Intensity
The Intensity module provides a way to brighten an image by
adding a specified amount to each RGB pixel value. Note that you can specify a
negative number to reduce the brightness of each pixel too. A pixels value
ranges from 0 to 255. Adding 255 to each pixel turns the image white. Adding
-255 will turn each pixel black.
R=R+value
G=G+value
B=B+value
Interface
Instructions
1. Manual - Use the count value to select how much to add to the current image. You can either type in a
number or use the scroll bar. To automate the adjustment of intensity you can use the [variable]
expression in the text box in order to have the module read the value from a variable instead
of using a set value.
2. Automatic - Select the appropriate method to use in determining the appropriate
threshold.
- Auto Adjust - automatically adjusts the intensity level such that the mean
intensity is at 128 (middle of 0 to 255).
- Shift to White - adjust all pixel values such that at least one pixel at value
255 exists. This ensures that the image has more upper values of the 0 - 255 range.
- Shift to Black - adjust all pixel values such that at least one pixel at value
0 exists. This ensures that the image has more lower values of the 0 - 255 range.
Example
| Source Image | Intensity value of 87 |
 |  |
See Also
Normalize
Equalize
|
