Type of image to image scale down
| Member | Value | Description |
|---|---|---|
| ciScaleMergeLineGaps | 1 | Merge gaps, making image lighter |
| ciScaleMergeLinePixels | 2 | Merge pixels, making image darker |
| ciScaleSkipLines | 3 | Skip extra lines |
| ciScaleThreshold | 101 | Apply threshold to merged lines |