| Symbol |
Parameter Name |
Category |
| ACF |
Autocorrelation
Function |
Spatial |
| APSDF |
Angular Power Spectral Density Function |
Spatial |
| mr |
Material
Ratio |
Functional |
| NormVolume |
Normalized
Surface Volume |
Legacy |
| Rpm |
Average Maximum Peak Height |
Legacy |
| Rvm |
Average
Maximum Valley Depth |
Legacy |
| Rz |
Average
Maximum Height of the Surface |
Legacy |
| Sa |
Average
Roughness |
Height |
| SAI |
Surface
Area Index |
Legacy |
| Sal |
Autocorrelation
Length |
Spatial |
| Sdc(mr) |
Inverse Areal Material Ratio |
Functional |
| Sdq |
Root
Mean Square (RMS) Surface Slope |
Hybrid |
| Sdr |
Developed
Interfacial Area Ratio |
Hybrid |
| Sds |
Summit
Density |
Hybrid |
| Sk |
Core
Roughness Depth |
Functional |
| Sku |
Kurtosis |
Height |
| Slope
Rq (X,Y) |
Root
Mean Squared Slope in X,Y |
Legacy |
| SMr1 |
Peak Material Portion |
Functional |
| SMr2 |
Peak Valley Portion |
Functional |
| Smr(c) |
Areal
Material Ratio |
Functional |
| Sp |
Maximum
Peak Height |
Height |
| Spk |
Reduced Peak Height |
Functional |
| Spk/Sk |
Reduced Peak Height to Core Ratio |
Functional |
| Spk/Svk |
Reduced Peak Height to Reduced Valley Depth Ratio |
Functional |
| Sq |
Root
Mean Square Roughness |
Height |
| Ssc |
Mean
Summit Curvature |
Hybrid |
| Ssk |
Skewness |
Height |
| Std |
Texture
Direction |
Spatial |
| Str |
Texture
Aspect Ratio |
Spatial |
| Stylus
(X,Y) Δq |
Root
Mean Square Slope Along X,Y |
2D Stylus |
| Stylus
X Δq/Stylus Y Δq |
Stylus Δq
Ratio |
2D Stylus |
| Stylus
(X,Y) λq |
Root
Mean Square (rms) Profile Wavelength Along (X, Y) |
2D Stylus |
| Stylus
X λq/Stylus Yλq |
Stylus
Yλq Ratio |
2D Stylus |
| Stylus
(X,Y) Pc |
Peak
Density Along X,Y |
2D Stylus |
| Stylus
X Pc/ Stylus Y Pc |
Stylus Pc Ratio |
2D Stylus |
| Stylus
(X,Y) Rpk |
Reduced
Peak Height Along X,Y |
2D Stylus |
| Stylus
(X,Y) Ra |
Average
Roughness Along X, Y |
2D Stylus |
| Stylus
X Ra/Stylus Y Ra |
Stylus Ra Ratio |
2D Stylus |
| Stylus
(X,Y) Rk |
Core
Roughness Along X, Y |
2D Stylus |
| Stylus
(X,Y) Rsm |
Mean
Profile Spacing Along X,Y |
2D Stylus |
| Stylus
(X,Y) Rt |
Maximum
Profile Height Along X, Y |
2D Stylus |
| Stylus
(X,Y) Rvk |
Reduced
Valley Depth Along X, Y |
2D Stylus |
| Stylus
(X,Y) Rz |
Average
Maximum Profile Height Along X, Y |
2D Stylus |
| Stylus
X Rz/Stylus Y Rz |
Stylus
Rz Ratio |
2D Stylus |
| Sv |
Maximum
Valley Depth |
Height |
| Svk |
Reduced
Valley Depth |
Functional |
| Svk/Sk |
Reduced
Valley Depth to Core Ratio |
Functional |
| Sxp
(p,q) |
Peak
Extreme Height |
Functional |
| Sz |
Maximum
Height of Surface |
Height |
| Vmc(p,q) |
Core
Material Volume |
Functional |
| Vm(mr) |
Material
Volume |
Functional |
| Vmp(p) |
Peak
Material Volume |
Functional |
| Vvc(p,q) |
Core
Void Volume |
Functional |
| Vv(mr) |
Void
Volume |
Functional |
| Vvv(p) |
Dale
Void Volume |
Functional |