Crease Detector Fold Depth Class Rater
Rate independently measured crease depth, not inferred damage or automatic image detection. Matched piecewise-linear calibration, no extrapolation or universal thresholds. Caller independently verifies observations, reference edition, units and applicability; not a grading-service certificate, authentication, conservation treatment, actual market price or legal/insurance entitlement.
Description
A crease or fold can be summarized using a severity calibration tied to the measurement basis.
A crease or fold can be summarized using a severity calibration tied to the measurement basis.1
This rater interpolates supplied fold-depth responses without assigning a certified grade or recommending repair.
When to use Crease Detector Fold Depth Class Rater
Use this tool when you need to read a measured branch response and local slope within its recorded domain. Prepare independently verified observations, reference edition/context, and matching units or currency basis.
How to use Crease Detector Fold Depth Class Rater and understand its results
- Prepare independently verified observations, reference edition/context, and matching units or currency basis.
- Enter observedFoldDepthCoordinates, independentlyMatchedFoldDepthResponses, queryFoldDepthCoordinate, following the field table and calculation rules below, then run the tool.
- Read interpolatedResponse, localObservedSlope. For result objects, inspect the nested output fields below, including any missing evidence or selected indices.
- Correct any input issues and run again. Before using a successful result, review its units, signs, evidence coverage, and stated model or reference assumptions.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| observedFoldDepthCoordinates | Observed fold depth coordinates | list of number | Required |
| independentlyMatchedFoldDepthResponses | Independently matched fold depth responses | list of number | Required |
| queryFoldDepthCoordinate | Query fold depth coordinate | number | Required |
Use matched increasing fold-depth coordinates and finite responses with an in-range query. Return the interpolated reference response and local slope.
The calibration helper requires at least two nonempty aligned finite samples with coordinates strictly increasing and the query in their closed interval. Interpolate linearly between neighboring coordinates and return the segment slope. At an exact knot use its observed response and the segment to the right, except at the final knot use the last segment. Out-of-range queries fail. Tool-specific restrictions stated above still apply.
t=(query−x_i)/(x_(i+1)−x_i); response=(1−t)y_i+t y_(i+1); slope=(y_(i+1)−y_i)/(x_(i+1)−x_i) Read these symbols with the field meanings and branch or reference rules above.
| Output field | Meaning | Value type |
|---|---|---|
| interpolatedResponse | Interpolated response | number |
| localObservedSlope | Local observed slope | number |
{
"input": {
"observedFoldDepthCoordinates": [
1,
2,
3
],
"independentlyMatchedFoldDepthResponses": [
2,
4,
8
],
"queryFoldDepthCoordinate": 2.5
},
"output": {
"interpolatedResponse": 6,
"localObservedSlope": 4
}
}Limitations and assumptions
The branch, units, observation conditions, and response interpretation must be independently matched. Linear interpolation does not justify extrapolation, supply a universal physical or grading law, or provide uncertainty bounds.
Missing required fields, unknown fields, wrong types, and violated calculation rules return input issues. Numeric values must be finite; nonfinite numeric outputs are rejected. Arrays must be dense, with no missing cells. Numeric lists allow at most 10000 entries, subject to smaller tool-specific bounds above.
Alternative or Complementary methods
For a related task, use Face-Free Fault Composite Grade Adjuster: A composite grade adjustment can subtract supplied fault deductions from a base grade while respecting a chosen floor. This calculator exposes the raw score as well as the floored result so severe deductions remain visible. For a complementary step, use Toned Spot Severity Area Percent Rater: Toning affects some portion of a stamp’s surface, but a ratio alone cannot establish its cause or a certified grade. This rater summarizes the measured toned area as a percentage of the supplied total stamp area.
References
-
Crease Detector Fold Depth Class Rater — tool.io
Similar or alternative tools
- Face-Free Fault Composite Grade Adjuster
A composite grade adjustment can subtract supplied fault deductions from a base grade while respecting a chosen floor. This calculator exposes the raw score as well as the floored result so severe deductions remain visible.
- Toned Spot Severity Area Percent Rater
Toning affects some portion of a stamp’s surface, but a ratio alone cannot establish its cause or a certified grade. This rater summarizes the measured toned area as a percentage of the supplied total stamp area.