Detection Settings
Detection settings include all settings, which are required for marker detection, decoding and sub-pixel measurement and allows for adapting to different measurement devices (e.q. SEM, AFM, CLSM).
To select detection settings in the software, the corresponding files must be stored in a specific folder:
C:\ProgramData\point electronic\microCAL\DetectionSettings
If different, the corresponding application data directory must be stated on the application settings file. The DetectionSettings folder can contain any number of files with specific detection parameters, which can then be selected in microCAL. The file extension must be .xml; the file name without the extension is used as the display name microCAL.
File format is XML.
Main sections
| Element |
Attributes |
Explanation |
Value |
Examples |
Default |
| settings |
|
Main element, contains general settings and all other elements |
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app |
Compatible apps/libs |
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task |
Compatible function calls |
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| coordinates |
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Definitions for the applied coordinate systems and processing methods |
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dimension |
Dimension of the coordinate system |
"2D" or "3D" |
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type |
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method |
Applied method for height interpolation |
"bilinear" |
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| template |
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Definitions and thresholds for the template applied for marker recognition |
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type |
Marker type |
"ring" or "circle" |
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| hough |
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Definitions and thresholds for marker detection with hough transformation |
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| crosscorrelation |
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Definitions and thresholds for marker detection with template matching |
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| decoding |
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Definitions and thresholds for marker decoding |
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| subpixel |
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Definitions and thresholds for subpiel marker measurement |
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type |
Applied method |
"CCSubPixelParaboloid" |
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Notes
dimension defines if the detection return only x, y (for "2D") or an height value z in addition (for "3D")type is not used so far, in future it may used for differentiation between pixel or metric measurements or definition of units
Template section
| Element |
Attributes |
Explanation |
Value |
Examples |
Default |
| radius_outer |
|
Outer radius of marker |
Integer |
5 |
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unit |
Unit |
"pixel" |
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| radius_inner |
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Inner radius of marker |
Integer |
3 |
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unit |
Unit |
"pixel" |
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| autocreate |
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Get parameter (type, radius, inverse marker) from reference data |
1 = true, 0 = false |
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| inverse |
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Set inverse marker (only required when autocreate=0 or dimension=2) |
1 = true, 0 = false |
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| autoadjust |
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Use resulting hough radius for adjusting template size |
1 = true, 0 = false |
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Hough section
| Element |
Attributes |
Explanation |
Value |
Examples |
Default |
| gradient_sigma |
|
Smoothing of gradient calculation |
Float |
1.0 |
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| gradient_threshold |
|
Threshold for binarization of gradients |
Float |
0.5 |
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| hough_theta |
|
Minimum number of votes |
Integer |
3 |
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| hough_steps |
|
Radius variation (+- value) |
Integer |
2 |
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unit |
Unit |
"pixel" |
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Crosscorrelation section
| Element |
Attributes |
Explanation |
Value |
Examples |
Default |
| rho_min |
|
Minimum correlation coefficient |
Float |
0.4 |
|
| roi_x |
|
Search area in x |
Integer |
7 |
|
| roi_y |
|
Search area in y |
Integer |
7 |
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Decoding section
| Element |
Attributes |
Explanation |
Value |
Examples |
Default |
| scale_tolerance |
|
Maximum distorion for scale (percent) |
Float |
15 |
|
| angle_tolerance |
|
Maximum distorsion for angle (degree)) |
Float |
5 |
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Subpixel section
| Element |
Attributes |
Explanation |
Value |
Examples |
Default |
| rho_min |
|
Minimum correlation coefficient |
Float |
0.5 |
|
| roi_x |
|
Search area in x |
Integer |
20 |
|
| roi_y |
|
Search area in y |
Integer |
20 |
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