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--- visual3d:documentation:pipeline:signal_commands:interpolate [2024/07/17 15:42] – removed sgranger
+++ visual3d:documentation:pipeline:signal_commands:interpolate [2024/07/17 15:46] (current) – created sgranger
@@ Line 1: / Line 1: @@
+====== Interpolate ======
+If there are unreliable data points (residuals < 0) in any signal it is possible to interpolate these gaps in the data using a spline interpolation.
+==== Visual3D Version 4 ====
+The interpolation procedure performs a least-squares fit of an nth order polynomial to k data points.
+|(x1,t1),...,(xk,tk)|k >= polynomial order + 1||
+\\
+|**Interpolate**       |                                                                                                                      |
+|**/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.                                   |
+{{:InterpolateDlg.png}}
+Dialog that pops up when pipeline selection is edited by double clicking with the left mouse button.
+=== Using an expression in Version 4 ===
+This is considerable more klunky because it requires 3 commands instead of 1:
+**Evaluate_Expression**
+/EXPRESSION=0.1*PARAMETERS::POINT::RATE
+/RESULT_NAME=RATE
+/RESULT_TYPE=METRIC
+/RESULT_FOLDER=TEMP
+**;**
+**Set_Pipeline_Parameter_To_Data_Value**
+/PARAMETER_NAME=GAP
+/SIGNAL_TYPES=METRIC
+/SIGNAL_NAMES=RATE
+/SIGNAL_FOLDER=TEMP
+! /SIGNAL_COMPONENTS=ALL_COMPONENTS
+**;**
+**Interpolate**
+/SIGNAL_TYPES=TARGET
+! /SIGNAL_NAMES=
+! /SIGNAL_FOLDER=ORIGINAL
+! /RESULT_SUFFIX=
+! /RESULT_FOLDER=PROCESSED
+/MAXIMUM_GAP=::GAP
+! /NUM_FIT=3
+! /POLYNOMIAL_ORDER=3
+**;**
+==== Visual3D Version 5 ====
+In version 5 we permit the three numerical parameters to have expressions.
+**Interpolate**
+/SIGNAL_TYPES=TARGET
+! /SIGNAL_NAMES=
+! /SIGNAL_FOLDER=ORIGINAL
+! /RESULT_SUFFIX=
+! /RESULT_FOLDER=PROCESSED
+/MAXIMUM_GAP=0.1*PARAMETERS::POINT::RATE
+! /NUM_FIT=3
+! /POLYNOMIAL_ORDER=3
+**;**
+{{:InterpolateDlg2.jpg}}
+=== Using an expression in version 5 ===
+Define the maximum size of the gap based on the POINT frame rate.
+{{:InterpolateDlg3.jpg}}