Description
Convert explicit independent slide-pixel axis calibrations to target square units per pixel.
Laboratory records distinguish specimen identity, sampling coverage, retained quantities, processing times, image scale, and measurement uncertainty. Areas, volumes, counts, and source-support flags measure different aspects of a record. A local calculation does not identify tissue or establish diagnostic adequacy.
Convert explicit independent slide-pixel axis calibrations to target square units per pixel.
When to use this tool
Use Digital Slide Pixel Area Factor when you need this specimen-record, sampling, processing-time, dimensional, or uncertainty calculation.
How to use the tool and how it works
- Enter xMicrometersPerPixel, yMicrometersPerPixel, targetMicrometersPerUnit. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read targetAreaPerPixel. Use the output convention below.
For positive xMicrometersPerPixel, yMicrometersPerPixel, and targetMicrometersPerUnit return targetAreaPerPixel=xScale*yScale/targetScale^2.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| xMicrometersPerPixel | X Micrometers Per Pixel | Required. Finite number; strictly above 0. |
| yMicrometersPerPixel | Y Micrometers Per Pixel | Required. Finite number; strictly above 0. |
| targetMicrometersPerUnit | Target Micrometers Per Unit | Required. Finite number; strictly above 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| targetAreaPerPixel | Target length units squared per pixel cell, not target length per pixel. | Required. Finite number. |
{
"input": {
"xMicrometersPerPixel": 0.5,
"yMicrometersPerPixel": 0.25,
"targetMicrometersPerUnit": 1000
},
"output": {
"targetAreaPerPixel": 1.25e-7
}
}Limitations and assumptions
- The output is target length units squared per pixel cell, not a linear scale. Anisotropic pixels are supported, but image calibration, lens distortion, tissue segmentation, and measurement accuracy are not verified.
- 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. Signed zero is exported as zero.
Alternative or Complementary methods
Use validated laboratory procedures, traceable measurements, and authenticated specimen records for a complete assessment. Check the relevant sampling and processing assumptions before interpreting a local quantity.
References
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