====== Extract ======
This logic can be used to extract or exclude images from a stack of images. This is especially useful, if one wants to remove bad images or whole classes of images after classification.

===== Modes =====
==== Range ====
A range of images will be extracted from the input stack. The exact limits of the range will be defined by the specified parameters.

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^ Parameters                 ^ Description     ^
| Number of images to copy   | Specify the number of images, that will be extracted from the input |
| First image                | Specify, which image shall be the starting/first image to be extracted. Note: The very first image of a stack has the index 0. |

==== List ====
A defined list of images will be extracted or excluded from the stack of images. The list must contain imageIDs separated by commas.

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^ Parameters                 ^ Description     ^
| Image list                 | List of images to be extracted or excluded from the input stack of images. |
| Mode                       | Define whether the in the list specified images shall be extracted to the output (Keep list) or excluded (Discard list) |

==== Condition ====
All images that comply with a given condition will be extracted from the input stack of images.

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^ Parameters                 ^ Description     ^
| Key                        | Specify a header key that will be used for the condition check. |
| Operator                   | Define the operator that will be used during the conditional check. |
| User specified key         | If under "Key" the option "Custom" is selected, here the actual header key must be defined. |
| Value                      | The value that is used for the conditional check |