Description
Return hair-count density under an occlusion denominator policy.
Skin-image research can record scale, annotation geometry, visibility and timing. Pixel counts, mask components and supplied metadata are technical summaries rather than disease findings or proof an image is suitable for diagnosis.
Return hair-count density under an occlusion denominator policy.
When to use this tool
Use Hair Count Occlusion Denominator when checking a supplied dermatology research image or annotation record.
How to use the tool and how it works
- Enter count, fieldArea, occludedArea, excludeOccluded. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read denominator, density. Use the output convention below.
Return hair-count density under an occlusion denominator policy. Require nonnegative whole count and fieldArea > occludedArea >= 0; use fieldArea-occludedArea when excludeOccluded, otherwise full fieldArea.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| count | Count | Required. Safe integer; minimum 0. |
| fieldArea | Field Area | Required. Finite number. |
| occludedArea | Occluded Area | Required. Finite number; minimum 0. |
| excludeOccluded | Exclude Occluded | Required. Boolean. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| denominator | Denominator | Required. Finite number. |
| density | Density | Required. Finite number. |
{
"input": {
"count": 40,
"fieldArea": 10,
"occludedArea": 2,
"excludeOccluded": true
},
"output": {
"denominator": 8,
"density": 5
}
}Limitations and assumptions
- The count is not automatically corrected for hidden hairs; no clinical density reference is selected.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use calibrated imaging and professional clinical assessment for any health interpretation; validate annotation and measurement methods separately.
References
Similar or alternative tools
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