Specifications

Reference Checker

The Reference Checker is a new feature that can be used for checking for mismatched point

references. Since the correctness of point references are key aspects in multi-photo projects,

this feature can considerably improve the overall accuracy, quality and robustness of your

projects.

The Reference Checker can optionally run automatically as one of the pre-processing stages

(i.e. before the Processing Dialog appears).

The Reference Checker depends on the Project Marking Quality setting found in the Project

Information dialog. A Project Marking Quality of -1.0 turns the Reference Checker off. A Project

Marking Quality of 1.0 turns the Reference Checker on.

The concept behind the Reference Checker is to check photographs pair wise to determine if

any points appear to be misreferenced or mismatched. There are situations where this cannot

be determined, for instance if a pair of photos has fewer than 9 correctly referenced points

between them.

The Reference Checker has a second stage that runs after Processing is complete. The second

stage of the Reference Checker renames, unreferences, or sets marks to ‘do not use’ if a

problem has been able to be determined. What action the Reference Checker takes depends

on the options set in the Processing dialog box. This second stage does not run if the first stage

did not find any problems or the first stage did not run for some other reason.

The results of the second stage are displayed in the Project Status Report and the message

looks similar to this:

“Problem: Points were automatically unreferenced/renamed/set to ‘do not use’ after processing

because they had residuals larger than the current Project Marking Quality of <p> pixels. <list of

points>

Suggestion: High point marking residuals are a result of mis-marking or inaccurate marking,

mis-referencing and/or poor camera orientation. Review problem points and remark and/or re-

reference where required. “

If problem points have been unreferenced in this stage you may consider reprocessing the

project for maximum accuracy and to see if any other points are identified by the Reference

Checker.

Note: To reverse the changes made by reference checker during processing, use the Undo

Process tool before making any other changes.