| Name | # | Type | Description |
| Subtract reference image background | 1 | boolean | Yes executes output #1, No executes output #2. |
| Local background subtraction method | 2 | string | The Nth output will be executed when the Nth value is selected here from a ;-separated list given below at "Possible selector values". |
| Local background: Rolling ball: median filter size | 3 | integer | The median is calculated over a width x width rectangular area around each pixel of the image. |
| Local background: Spatial filtering: Number of tiles in x | 4 | integer | The image consists of this number of equal sized tiles in x dimension. |
| Local background: Spatial filtering: Number of tiles in y | 5 | integer | The image consists of this number of equal sized tiles in y dimension. |
| Local background: Spatial filtering: Largest object size (for background removal, pixels times number of tiles) | 6 | real | Size of the object to be passed by the filtering. The pixel size must be multiplied by the number if tiles (in x or y). Objects larger than this will be removed as background. Cut on of the band pass Butterworth filter. |