Watermark Inverted or Sideways Position Detector
Describe actual watermark rotation relative to independently established upright reference; mirror evidence separate. 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 watermark may appear upright, inverted, sideways, or mirrored relative to the stamp design.
A watermark may appear upright, inverted, sideways, or mirrored relative to the stamp design.1
This checker classifies a supplied rotation and keeps mirror information separate from whether the orientation was actually assessed.
When to use Watermark Inverted or Sideways Position Detector
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 Watermark Inverted or Sideways Position Detector and understand its results
- Prepare independently verified observations, reference edition/context, and matching units or currency basis.
- Enter measuredClockwiseRotationDegrees, orientationKnown, mirrorKnown, observedMirrored, following the field table and calculation rules below, then run the tool.
- Read orientation, mirrorStatus. 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 |
|---|---|---|---|
| measuredClockwiseRotationDegrees | Measured clockwise rotation degrees | number | Required |
| orientationKnown | Orientation known | boolean | Required |
| mirrorKnown | Mirror known | boolean | Required |
| observedMirrored | Observed mirrored | boolean | Required |
Wrap the finite rotation modulo 360. When orientationKnown is false return unknown; otherwise exact zero is upright, 180 inverted, 90 or 270 sideways, and every other angle oblique. When mirrorKnown is false return mirrorStatus=unknown; otherwise return observed-mirrored or not-observed-mirrored from observedMirrored. The two availability flags are independent; no tolerance or image recognition is applied.
orientation=known?classifyExactAngle(wrap360(rotation)):unknown Read these symbols with the field meanings and branch or reference rules above.
| Output field | Meaning | Value type |
|---|---|---|
| orientation | Orientation | string |
| mirrorStatus | Mirror status | string |
{
"input": {
"measuredClockwiseRotationDegrees": 180,
"orientationKnown": true,
"mirrorKnown": true,
"observedMirrored": false
},
"output": {
"orientation": "inverted",
"mirrorStatus": "not-observed-mirrored"
}
}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 Watermark Type Identifier Code Lookup (crown/anchor etc.): Stamp watermarks can help distinguish paper or issue variants, but a code’s meaning depends on the catalogue or edition. This lookup retrieves the description attached to an exact supplied issue-and-edition key. For a complementary step, use Paper Type Identifier Wove versus Laid Detector: Wove and laid paper structures refer to different paper patterns that must be observed in context. This detector compares supplied evidence with caller classes instead of scanning a specimen or applying a physical test.
References
Similar or alternative tools
- Watermark Type Identifier Code Lookup (crown/anchor etc.)
Stamp watermarks can help distinguish paper or issue variants, but a code’s meaning depends on the catalogue or edition. This lookup retrieves the description attached to an exact supplied issue-and-edition key.
- Paper Type Identifier Wove versus Laid Detector
Wove and laid paper structures refer to different paper patterns that must be observed in context. This detector compares supplied evidence with caller classes instead of scanning a specimen or applying a physical test.