Toned Spot Severity Area Percent Rater
Normalize measured toned spot area; no photographic segmentation or universal severity band. 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
Toning affects some portion of a stamp’s surface, but a ratio alone cannot establish its cause or a certified grade.
Toning affects some portion of a stamp’s surface, but a ratio alone cannot establish its cause or a certified grade.1
This rater summarizes the measured toned area as a percentage of the supplied total stamp area.
When to use Toned Spot Severity Area Percent Rater
Use this tool when you need to summarize the supplied collecting records or matched observations. Prepare independently verified observations, reference edition/context, and matching units or currency basis.
How to use Toned Spot Severity Area Percent Rater and understand its results
- Prepare independently verified observations, reference edition/context, and matching units or currency basis.
- Enter tonedAreaMm2, stampAreaMm2, following the field table and calculation rules below, then run the tool.
- Read tonedAreaPercent. 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 |
|---|---|---|---|
| tonedAreaMm2 | Toned area mm2 | number | Required |
| stampAreaMm2 | Stamp area mm2 | number | Required |
Require positive stamp area and nonnegative toned area no greater than total area, measured in the same square units. Divide toned area by stamp area and multiply by one hundred.
tonedPercent=100×tonedArea/stampArea Read these symbols with the field meanings and branch or reference rules above.
| Output field | Meaning | Value type |
|---|---|---|
| tonedAreaPercent | Toned area percent | number |
{
"input": {
"tonedAreaMm2": 3,
"stampAreaMm2": 60
},
"output": {
"tonedAreaPercent": 5
}
}Limitations and assumptions
Observations, reference edition, and applicability are independently supplied. Arithmetic and reference summaries do not provide authentication, a certified grade, or an actual market price.
Missing required fields, unknown fields, wrong types, and violated calculation rules return input issues. Numeric values must be finite; nonfinite numeric outputs are rejected.
Alternative or Complementary methods
For a related task, use Foxing Spot Count Density Grader: Foxing spot density describes an observed count per measured surface area. This grader returns that ratio without converting it to an issue-independent severity label or determining the origin of the spots. For a complementary step, use Gum Crack Frequency Severity Rater: Gum cracking can be scored under a specific observation and reference convention. This rater interpolates a supplied crack-severity curve and does not prescribe treatment or determine original gum.
References
-
Toned Spot Severity Area Percent Rater — tool.io
Similar or alternative tools
- Foxing Spot Count Density Grader
Foxing spot density describes an observed count per measured surface area. This grader returns that ratio without converting it to an issue-independent severity label or determining the origin of the spots.
- Gum Crack Frequency Severity Rater
Gum cracking can be scored under a specific observation and reference convention. This rater interpolates a supplied crack-severity curve and does not prescribe treatment or determine original gum.