| Value | Description |
|---|---|
| iecaSkewedDocument | Works best with documents requiring rotation due to scanning skew (not lined up correctly when scanning) or a previous rotation. In this case the image will generally already have unwanted null/white area which should be be trimmed |
| iecaAngledPhoto | Works best with photos requiring rotation due camera skew (the camera is not quite horizontal). In this case the image looks valid, but the horizon is not horizontal. After rotation the image will have new null/background area, which we want to trim |