Using Auto-SYNC for Digital Input Connections
198 TIMS MVP
™
Setup and Configuration Guide
Phase Determination
Phase Determination is not supported when using SDTV S-video or Composite video inputs with
the AccuStream HD+ and HD+C series frame grabbers.
The following phase determination methods are supported:
Coarse (default)
:
Performs a fast measurement survey, generating summary information for about 1/6th of the
candidate phase values.
Attempts to locate the candidate with the lowest pixel value standard deviation.
Runs quickly and provides reasonable results with a wide variety of image/format combinations.
Refined
:
Performs a thorough measurement survey, generating summary information for all of the
candidate phase values.
Typically slower than the other methods, but is more precise and reliable for most image/format
combinations.
Thorough:
Performs a thorough measurement survey, generating detailed image information for all of the
candidate phase values.
Uses the image data to precisely measure the image stability at each candidate value and selects
the most stable.
This is the slowest method (often slower than manual calibration), but the results are the most
resilient to changes in temperature and image content. The results are superior to those
produced by the unaided eye.
Custom A (StDev best):
Performs a thorough measurement survey, generating summary information for all candidate
phase values.
Is a variation of the Coarse and Refined methods.
Attempts to locate the candidate with the lowest pixel value standard deviation.
Custom B (Sharp hunt):
Performs a fast measurement survey and generates summary information for about 1/6th of the
candidate phase values.
Attempts to locate the candidate value with the sharpest histogram peaks.
This method produces best results with images that are almost entirely an alternating white-
pixel/black-pixel pattern. Examples of such patterns include the checkerboard "resolve" pattern
and the vertical striped "grill" pattern (with one-pixel stripes).
