Refining
Since there are often multiple possible solutions to the calibration process and a significant amount of error can accumulate, the final step to match moving often involves refining the solution by hand. This could mean altering the camera motion itself or giving hints to the calibration mechanism. This interactive calibration is referred to as "refining".
Most match moving applications seem based on similar algorithms for tracking and calibration. Often, the initial results obtained are similar. However, it seems that each program has different refining capabilities. Therefore, when choosing software, look closely at the refining process.
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