Color Grade Letter Boundary Checker
Audit caller color-grade coordinate bands with inclusive lower boundaries and measurement uncertainty, retaining multiple compatible codes; no automatic D–Z laboratory grading or interpretation of uncalibrated color coordinates.
Description
A calibrated color coordinate may lie close enough to a boundary that multiple bands are compatible with measurement uncertainty.
A calibrated color coordinate may lie close enough to a boundary that multiple bands are compatible with measurement uncertainty. Reporting all compatible codes avoids false precision.1
Audit caller color-grade coordinate bands with inclusive lower boundaries and measurement uncertainty, retaining multiple compatible codes; no automatic D–Z laboratory grading or interpretation of uncalibrated color coordinates.
When to use Color Grade Letter Boundary Checker
Use this tool to audit caller color-grade coordinate bands with inclusive lower boundaries and measurement uncertainty, retaining multiple compatible codes; no automatic D–Z laboratory grading or interpretation of uncalibrated color coordinates.
Prepare the gemstone measurements, spectra or comparison data and any supplied calibration parameters. Check units, reference conditions and record alignment.
How to use Color Grade Letter Boundary Checker and understand its results
- Prepare the gemstone measurements, spectra or comparison data and any supplied calibration parameters. Check units, reference conditions and record alignment.
- Enter measuredColorCoordinate, callerColorGradeLowerEdges, coordinateHalfUncertainty using the field table and calculation rules, then run the tool.
- Read centralCallerColorGradeCode, compatibleCallerColorGradeCodes, gradeBoundaryAmbiguous. The explanation below defines the units, signs, ordering and any flags or placeholder values.
- If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.
| Input field | Meaning | Value type; see rules below | Requirement |
|---|---|---|---|
| measuredColorCoordinate | Measured color coordinate | number | Required |
| callerColorGradeLowerEdges | Caller color grade lower edges | list of number | Required |
| coordinateHalfUncertainty | Coordinate half uncertainty | number | Required |
Supply a finite coordinate, nonnegative half uncertainty and 2–128 increasing lower edges covering both endpoints. Return central code, every inclusive zero-based compatible code and ambiguity when endpoint codes differ.
Each sequence checked for increasing order must contain at least two strictly increasing values.
compatible codes=all bands from measured coordinate−half uncertainty through coordinate+half uncertainty Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| centralCallerColorGradeCode | Central caller color grade code | number |
| compatibleCallerColorGradeCodes | Compatible caller color grade codes | list of number |
| gradeBoundaryAmbiguous | Grade boundary ambiguous | boolean |
{
"input": {
"measuredColorCoordinate": 2,
"callerColorGradeLowerEdges": [
0,
1,
3
],
"coordinateHalfUncertainty": 1
},
"output": {
"centralCallerColorGradeCode": 1,
"compatibleCallerColorGradeCodes": [
1,
2
],
"gradeBoundaryAmbiguous": true
}
}Limitations and assumptions
No automatic D–Z grading or uncalibrated-coordinate interpretation is supplied.
Numeric inputs and returned numeric values must be finite; an unrepresentable returned value produces an error. Numeric lists are limited to 100,000 entries; the rules above may require smaller limits. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors. A successfully returned false flag is an evaluated outcome; its meaning is explained above.
Alternative or Complementary methods
Use Pearl Size Millimeter Sieve Classifier: Classify measured pearl diameter with caller sieve bands and boundary uncertainty, preserving multiple possible sizes; no invented exact size at ambiguous screen boundary. For a complementary task, use Fluorescence Strength Grade Mapper: Map excitation-normalized background-corrected fluorescence under caller assay-specific bands; retain negative nondetections and no commercial UV grade/material identity or safe lamp exposure inferred.
References
-
Color Grade Letter Boundary Checker — tool.io
Similar or alternative tools
- Pearl Size Millimeter Sieve Classifier
Classify measured pearl diameter with caller sieve bands and boundary uncertainty, preserving multiple possible sizes; no invented exact size at ambiguous screen boundary.
- Fluorescence Strength Grade Mapper
Map excitation-normalized background-corrected fluorescence under caller assay-specific bands; retain negative nondetections and no commercial UV grade/material identity or safe lamp exposure inferred.