This set of parameters determines how the panorama will be optimized. It is during the optimization step that each image position is computed based on the control points it holds. By default only the optimization profiles are displayed in the dialog. The Advanced Options are only displayed if you click on the "Show Advanced Options" button.
Four (4) optimization profiles are available:
- Quick: this will perform a very fast optimization that can possibly fail if some bad image links exist in the panorama.
- Strong: (default) suited for most stitching projects. This profiles leaves room for intervention in case some bad links exist but, as a trade-off, is slower.
- Gigapixel: select this profile for all projects over 200 images.
- Fisheye: select this profile for any project using fisheye images.
These profiles are presets for the several optimization steps.
- Use grid position: this option will only be available after an import from a panoramic shooting head that will provide the images coordinates (typically Papywizard or Clauss). This option will then be active and will let the optimization engine know if it needs (or not) to take the images coordinates in account during the optimization process.
- Assume row/column shooting: was the shooting performed in a row/column pattern or not? This option is activated for panoramas issued from a Gigapan shooting head. We suggest using this option only in that particular case because this mode needs enhanced accuracy during the shooting process (n row, p column). It is best not to use this option if you find yourself with an extra source image in one row or in one column, or if the spacing between two consecutive rows varies too much.
- Optimizer stages
- 1) Local approach: this is a very fast algorithm that allow for a local pre-location of the images.
- 2) First optimization: this is the main optimizer, taking all links into account in a global way.
- 3) Clean up control points or links:
- Keep only control points below this error (RMS): useful when only quality matters.
- Keep only the N best control points: useful when only the number of control points per image matters.
- Remove links over this error (RMS): useful when only links quality matters.
- 4) Final optimization: the same main optimizer used in stage 2 is called upon (if it hasn't been yet) or recalled upon (to take into account de deletions performed in stage 3).
- 5) Adjust lens distortion: this option allows for lens distortion correction (very useful on short and medium focal length). It is better to uncheck this option if you are stitching a gigapixel panorama as it will slow down the detection process.
- Advanced distortion: allow for better distortion correction on fisheye lenses