Can you measure again from a saved thermal image?

Decide what the saved file needs to do

A rendered thermal image can show the palette, a temperature scale and labels added during capture. It may be enough to illustrate an observation. It may not retain the underlying information needed to add a new measurement point or change measurement parameters later.

A radiometric file preserves additional measurement information for compatible analysis software. The exact contents and editable settings depend on the device and format. A .jpg extension alone does not tell you which kind of file you have.

Try a real capture-to-analysis round trip

Before relying on a camera for reports, save an original file, copy it to the intended computer and reopen it. Check whether you can place a new measurement point, inspect the scale and retain the information you need. Keep an exported presentation image separately.

Gough provides sample radiometric files and records an Android-to-Windows reanalysis problem in the reviewed P3 workflow. Terence Eden's standalone TOPDON review documents a different obstacle: getting the images off the device with the intended computer setup. Both failures matter even if the camera itself captures an image.

Keep the original alongside the presentation

Store the unmodified original with the visible photograph and field notes. If you change the palette, temperature span or annotations for publication, preserve that edited version as a separate file.

A larger exported image may simply be an enlarged or processed output. It does not establish that the detector captured more independent detail, and a social-media copy may discard metadata or other information.

• Keep the camera's original file rather than only a screenshot.
• Record camera, firmware and capture-app versions.
• Test reopening in the intended analysis software.
• Separate original files, edited views and report illustrations.
• Verify any raw-data claim before describing a file as radiometric.

Check the limits of later adjustment

Being able to change a setting after capture does not repair poor focus, insufficient target coverage or an unsuitable viewing angle. A file containing measurement data still reflects the original scene and instrument limitations.

The tCam-Mini project reported by CNX shows the value of distinguishing measurement data from a display-oriented thermal image. That article is a project description, not CNX's own performance test of the device.