8.10. Color to GrayScale
Group (Subgroup)
Processing (Image)
Description
This Filter allows the user to select a flattening method for turning an array of RGB or RGBa values into grayscale values.
Luminosity: The luminosity method is a more sophisticated version of the average method. It also averages the values, but it forms a weighted average to account for human perception. We re more sensitive to green than other colors, so green is weighted most heavily. The default formula for luminosity is BT709 Greyscale: Red: 0.2125 Green: 0.7154 Blue: 0.0721. The user can set the weightings to what ever values they would like.
Average (R + G + B) / 3
Lightness (max(R, G, B) + min(R, G, B)) / 2
Color Channel: The user selects a specific R|G|B channel to use as the GrayScale values.
The user can select 1 or more image data arrays which are assumed to be multi-component arrays of unsigned 8 bit values. The user can create a new AttributeMatrix if they want to store all the newly created arrays in a separate AttributeMatrix.
Additional GrayScale Conversions
The following are some additional accepted grayscale conversions
RMY Greyscale: Red: 0.5 Green: 0.419 Blue: 0.081
(YIQ/NTSC): Red: 0.299 Green: 0.587 Blue: 0.114
Input Parameter(s)
Parameter Name |
Parameter Type |
Parameter Notes |
Description |
|---|---|---|---|
Conversion Algorithm |
Choices |
Which method to use when flattening the RGB array |
|
Color Weighting |
Vector of Float32 Values |
Order=Red,Green,Blue |
The weightings for each R |
Color Channel |
Scalar Value |
Int32 |
The specific R |
Input Data Arrays |
MultiArraySelection |
Select all DataArrays that need to be converted to GrayScale |
Output Parameters
Parameter Name |
Parameter Type |
Parameter Notes |
Description |
|---|---|---|---|
Output Data Array Prefix |
String |
This prefix will be added to each array name that is selected for conversion to form the new array name |
Example Pipelines
License & Copyright
Please see the description file distributed with this Plugin
DREAM3D-NX Help
If you need help, need to file a bug report or want to request a new feature, please head over to the DREAM3DNX-Issues GitHub site where the community of DREAM3D-NX users can help answer your questions.