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Appendixes
FZ4 User's Manual Terminology Explanations 591
Calibration
This refers to conversion of measured pixel unit dimensions to actual dimensions.Setting the relationship
between actual coordinates and camera coordinates enables conversion of measurement results in
pixel units to actual dimensions.
To output measured values converted by calibration to external devices, set "Calibration" in "Output
parameter" of each unit to "ON".
For example, in the case of an object that measures 20 mm wide and has a 200-pixel width in the
measured image, calibration is performed as follows.
20 (mm) / 200 (pixel) = 0.1 (mm/pixel)
In other words, 1 pixel (pix) in the camera coordinates corresponds to 0.1 mm in actual size.
Measurement flow
A measurement processing series is called a measurement flow. You can combine processing items to
create measurement flows.
Detection point
This is the point that specifies the coordinates of which part of the model are to be output by the search
and ECM search processing item. The initial value is at the center of a model.
Candidate
With regards to search based processing items (search, flexible search, ECM search, classification,
character inspection, model dictionary), both a rough search, which is a search over the entirety of the
measurement region, and a detailed search, which is a search in areas of the rough search where
correlation was high are performed. The candidate point is the point at which an area becomes a
candidate for "Detail search". The candidate point level represents the rough search correlation value. If
stable search of a model is not possible, set the candidate point level lower.
Sub-pixel
Points that are formed finer than pixels.In the case of search processing, if sub-pixel processing is
turned on for measurement parameters, interpolation measurement is performed using sub-pixel units.
Scene
Measurement processing that is created with a combination of units. Preparing a scene for each
measurement object or measurement content makes it easy to change measurements.
Reference:
What Is a Scene? (p.42)
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