Microsphere Size Analyzer.

Upload a micrograph, set the scale, and measure microsphere diameters in your browser — count, D10/D50/D90, span, and a lognormal fit. Client-side; nothing is uploaded.

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Load example microsphere micrograph data to see the full workflow

Upload a micrographPNG or JPEG · processed in your browser

Method

Grayscale thresholding produces a binary mask; 4-connected components are labelled; each component's area gives an equivalent-circle diameter (D = √(4A/π)). Border-touching, undersized, and low-circularity components are excluded. Kept diameters feed the shared distribution engine (number-weighted).

Published

Published 2026-06-19. Calculations support planning and documentation; verify procurement decisions against manufacturer specifications or institutional SOPs.

How to cite

How to Cite

ConductScience. Microsphere Size Analyzer. 2026.

ISO 13322-1:2014 Particle size analysis — Image analysis methods — Static image analysis methods.

Frequently asked

Does my image get uploaded?

No. Detection runs entirely in your browser using the canvas API; the image never leaves your machine.

How do I set the scale?

Enter pixels-per-micron from your microscope, or use a known scale-bar length. Diameter accuracy depends on this calibration — use a traceable standard for quantitative work.

What are the limits?

Best on reasonably separated, high-contrast spheres above ~2 µm with standard optics. Heavy aggregates, low contrast, and sub-micron particles are where the full ConductVision Image product is warranted. Results are number-weighted, not volume-weighted.

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