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--- visual3d:documentation:pipeline:signal_commands:interpolate [2024/07/17 15:42] – removed sgranger
+++ visual3d:documentation:pipeline:signal_commands:interpolate [2025/05/20 13:35] (current) – Cleaned up page for a customer. Still needs to be put into Pipeline project format. wikisysop
@@ Line 1: / Line 1: @@
+====== Interpolate ======
+The Interpolate command fills in any gaps in a signal's data using a spline interpolation. This can be useful if there are unreliable data points ([[visual3d:documentation:c3d_signal_types:target_data_type#target_marker_residuals|residuals]] < 0).
+The interpolation procedure performs a least-squares fit of an nth order polynomial to k data points.
+<code>
+|(x1,t1),...,(xk,tk)|k >= polynomial order + 1|
+</code>
+The command is given in text form as:
+<code>
+Interpolate
+/SIGNAL_TYPES=
+! /SIGNAL_NAMES=
+! /SIGNAL_FOLDER=ORIGINAL
+! /RESULT_SUFFIX=
+! /RESULT_FOLDER=PROCESSED
+/MAXIMUM_GAP=
+! /NUM_FIT=3
+! /POLYNOMIAL_ORDER=3
+;
+</code>
+{{:InterpolateDlg2.jpg}}
+===== Parameters =====
+^ Parameter ^ Description ^
+| /Signal_Types | The type of signal to be processed. |
+| /Signal_Names | The names of the signals to be processed. |
+| /Signal_Folder | The name of the signal folder. |
+| /Num_Fit | The number of frames of data before and after the "gap" that are used to calculate the coefficients of the polynomial. |
+| /Polynomial_Order | The order of the polynomial used. |
+| /Maximum_Gap | The maximum number of frames of data that can be replaced with interpolated values. |
+===== Example: Using an expression =====
+Define the maximum size of the gap based on the POINT frame rate.
+{{:InterpolateDlg3.jpg}}