Parameter description

The changes of parameters can be reached from “PhaseEval -> edit -> settings” or from “InterSAFT -> Tools -> Phase Options”.

Phase calculation parameters.

Some of the parameters may be changed in main window. PO: Phase Offset, th: Threshold, col: No. Phase Colors, am: gain exponent. Other parameter are for display only: iw: inner window of evaluation (samples), ow: outer window for separation (samples)

Phase Calculation Parameters

Name	Value range/Type/Unit	Meaning
Phase Flag		no meaning in phase_eval
Threshold Value	0.1	Detection threshold normalized to the global maximum
Frequency	[Hz]	Center frequency of the analysis.
no. cylcles	1,2,4	Number of cycles (at center frequency) to be used for analysis
Plot Cycles	1,2,4	Number of cycles to be plotted in the color according the phase
Outer Window Limit	1…2	Relative enlargement of the distance between two indications
Phase Offset	-180/180	Additive number for correction of the phase calculation
No. Colors	0,1,2..	Number of colors used from color table: 0: continuous. No meaning for external color tables
Window Flag	0..1	Parameter of the Tukey Window applied to the full range before the analysis. (0: no window)
Test Plot	0..nx	Display of intermediate results at the cursor position or at nx
Phase Event	1..no. of phase detection	Testplot of the n-th detection in a line. The values are sorted with maximum first.
Phase Mode Flag	1,2	1: 1D, 2: 2D Analysys of the data
Phase Method	1,2	1: Analysis at the biggest spectral line; 2: Analysis at the spektral line with the given frequency
Min, Max Phase Range(z)	[m]	Limits of the depth range (z-direction). The range is marked at the left border of the phase image
Phase Window Parameter		Tukey window parameter of the window applied to the analysed data section. (0: no window)
No. of Phase Detections	1,n	Number of maxima which are analysed per line
Phase Oversampling	1,2	Oversampling of the data section to be analysed. Should improve the maximum detection.
Detection Angle		Restriction of the angle range used with 2D analysis.
Phase Mask Flag	0,1	Indication of the detected angle for 2D analysis within the phase image (yes/no) (0/1)
Depth Correction (count)	0,n	Number of phase correction points in z-direction used in the next input line. The correction points are interpolated by spline interpol.
Position/offset Pairs	[m], [Grad]	List of n pairs (z-value, phase value)
Angle Correction (count)		Number of phase correction points in angle direction used in the next input line. The correction points are interpolated by spline interpol
Offset Anlge Pairs	[Grad,Grad]-90,-90,-180,180	List of n pairs (z-value, phase value)
Phase Labels	0..n	Number of list elements for user defined text at the color table
Phase Position Labels		List of n pairs (phase value, label) for user defined text at color table
No. Phase Colors	0..n	Number of list elements for user defined colors as RGB values
Phase Color Values List of n triple (r,g,b) values, in the range (0 .. 1)