Description
Return measured-minus-reference image-channel value.
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 measured-minus-reference image-channel value.
When to use this tool
Use Skin Image Reference Channel Gap when checking a supplied dermatology research image or annotation record.
How to use the tool and how it works
- Enter measured, reference. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read gap. Use the output convention below.
Return measured-minus-reference image-channel value. gap = measured-reference in a common channel scale.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| measured | Measured | Required. Finite number. |
| reference | Reference | Required. Finite number. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| gap | Gap | Required. Finite number. |
{
"input": {
"measured": 120,
"reference": 100
},
"output": {
"gap": 20
}
}Limitations and assumptions
- No color calibration, illumination correction, feature detection or skin-condition classification is performed.
- 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
- Skin Image Region Resolution Gap
Compare image-region pixel dimensions with supplied targets.
- Skin Image Ruler Plane Offset
Apply a supplied ruler-plane correction to image length.