MICROGRAPH — SCALE AND DIMENSION RECORD
Version: 2026-09-11
Guide: https://yenra.com/nanocrystals/

Purpose: estimate a projected image dimension using a reliable scale bar.
Use an undistorted image with the object and bar at the same zoom.
Keep a source copy. Uniform resizing preserves the ratio; unequal stretching
in different directions compromises measurement. Record image processing.

Image source / figure / file / acquisition information:
Material / growth condition / trial or batch:
Chosen dimension (whole length, branch width, radius, diameter, etc.):
Viewing direction / projection limits:
Scale-bar label and physical units:
Scale-bar length in pixels:
Object dimension in pixels:

Physical units per pixel = bar label / bar length in pixels.
Projected dimension = object pixels × physical units per pixel.

FICTIONAL EXAMPLE
500 nm bar / 100 pixels = 5 nm per pixel.
60 object pixels × 5 nm per pixel = 300 nm = 0.30 micrometers.
These invented numbers demonstrate arithmetic, not measurement precision.

CALCULATION
Scale with units:
Dimension with units:
Edge-selection uncertainty / resolution / other limitations:
Significant digits justified by the measurement:
Radius or diameter clearly identified:

POPULATION MEASUREMENT
Selection rule established before choosing objects:
Fields of view / number of objects:
Overlapping, truncated or ambiguous objects and handling rule:
Object ID | pixel dimension | physical dimension and units | notes
Distribution and summary statistic:
Repeat preparation or field-of-view evidence:
Comparison conditions and variables changed:
Conclusion supported by the observed scale and sampling:

A measured projected shape does not by itself identify a crystal lattice.
Retain the structural evidence separately from the image dimensions.