What this workflow helps you do
Add a physical scale bar to a microscopy image without separating the visual bar from the calibration that gives it meaning. This workflow uses NotyScale to verify the image scale, choose a readable physical length, style the bar and label, and export the prepared figure.
Use this workflow when
- Preparing SEM, TEM or optical microscopy images for a paper, thesis, poster or presentation.
- Replacing an inconsistent or unreadable scale-bar design with a calibrated, repeatable presentation.
- Creating several figures that should share the same scale-bar style while retaining image-specific calibration.
What you need before you start
- The original image at the resolution you intend to use.
- A verified calibration attached to the image, or a trustworthy known distance that can be used to create one.
- The physical unit and a bar length that will remain useful at the final display size.
Step-by-step workflow
- Open the original image in NotyScale and verify that the active image is the one you intend to export.
- Confirm the attached calibration. If the image is not calibrated, establish the scale before choosing a physical bar length.
- Choose the physical bar length and unit, then select the bar style and direction that suit the figure.
- Position the bar and label away from important image features and adjust thickness, typography, contrast and background as needed.
- Preview the figure at approximately its final viewing size and verify that the number, unit and bar remain readable.
- Export the prepared image and inspect the exported file once more before placing it in a manuscript or slide.
What to review in the result
- The displayed physical length agrees with the image calibration.
- The label uses the intended unit and remains legible after resizing.
- The bar and text have enough local contrast without obscuring evidence.
- The bar is part of the complete image export rather than resized independently afterward.
Before you report or export
- Keep the unmodified source image and calibration record with the exported figure.
- If the complete image is resized later, resize it proportionally so the bar changes with the image.
- Recheck calibration after any operation that changes pixel sampling or image dimensions in a non-equivalent way.
Limitations and interpretation
- NotyScale cannot make an incorrect calibration scientifically valid; scale accuracy starts with the reference used to calibrate the image.
- A scale bar that is physically correct can still be poor communication if it is too small, low-contrast or placed over important features.
- Calibration is image-specific and should not be transferred between magnifications or acquisition settings without verification.