Machine Vision & Industrial Inspection AI worked example

Min Detectable Defect with horizontal field of view of 110 mm: a worked example

Suppose horizontal field of view falls to 110 mm. This page works the full calculation at that level so you can see exactly which result moves and by how much. Calculate the minimum defect size a machine vision camera can reliably detect by multiplying the inspection resolution (mm per pixel) by the minimum number of pixels required to detect and classify a defect.

The inputs for this scenario

  • Horizontal field of view (FOV width): 110 mm (the input this scenario stresses; the baseline uses 220)
  • Camera horizontal pixel count: 2,448 pixels (held at the documented default)
  • Minimum pixels required to detect a defect: 3 pixels (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Inspection resolution = FOV width / horizontal pixel count.
  • Minimum detectable defect size works out to 0.13 mm at these inputs, and this is the headline figure for the scenario.
  • Inspection resolution (mm per pixel) works out to 0.04 value at these inputs.
  • Minimum pixels required per defect works out to 3 x at these inputs.
  • Camera horizontal pixel count works out to 2,448 value at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where horizontal field of view sits at 220 mm and the headline result is 0.27 mm, this scenario comes in 50% below the baseline at 0.13 mm.
  • It computes the smallest reliably detectable defect size in mm by multiplying spatial resolution (FOV / pixels) by the minimum pixels needed to register a defect. When the numbers land here, the stressed input is the lever to work; the walkthrough above shows exactly how much each output recovers as it climbs back toward the baseline.

Results at a glance

  • Minimum detectable defect size: 0.13 mm (headline result)
  • Inspection resolution (mm per pixel): 0.04 value
  • Minimum pixels required per defect: 3 x
  • Camera horizontal pixel count: 2,448 value

Run it with your numbers

  • To rerun this with your own numbers, open the live Min Detectable Defect calculator, set horizontal field of view to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.