HD media

When you import an image into Calibration Flow — whether a target to measure or a final image to print — the app keeps a complete copy of it on your device. It's this copy that lets you come back to generate a new negative with different parameters without having to reimport the original file from your folders.

The HD media tab gathers these copies. Each imported image is kept here at full resolution, with its thumbnail for display and its source file for operations. It's the reservoir of raw material for all your prints — the base from which the app can regenerate any negative you've produced.

#What you see

The tab shows a grid of thumbnails — one per source image you've imported. Each thumbnail shows the miniature, the original file name, the detected format (HEIC, JPEG, PNG…), and the native dimensions in pixels.

You can click a thumbnail to open the image in the analysis module — as if you'd just imported it for the first time. You find your image, ready to be analyzed, corrected and exported to a negative. If you've already generated negatives from this image (viewable in the Generated images tab), you can see them linked to this source too.

You can delete an HD media item. This frees up space on your device but disables negative regeneration from this image — if you need to go back to an export, you'll have to reimport the original image from your folders.

#Why it matters

For regeneration without reimport. You generated a negative with a thin frame, now you want to try with a thick frame. Without HD media, you'd have to reimport the source image from Lightroom or your disk. With HD media, you click the thumbnail in the library, the image is instantly reloaded into the analysis module, and you can regenerate in a few seconds.

For work across several sessions. If you're preparing a series of ten prints over several days, you import the ten images at the start. They stay in HD media. Each session, you pick an image back up, you finalize its correction, you generate. No repetitive reimport.

For practical safekeeping. Your source images stay in their original folder, but Calibration Flow has a local copy of them — so even if you move or rename the originals, you can keep working on the app's internal copies. Not a real backup strategy (don't use the app as a backup system), but a protection against accidental handling.

#When you don't need it

For one-off imports. If you import an image, analyze it, export your negative and move on with no intention of returning, you can delete the HD media after the export to free up space.

To save space drastically. Source images can weigh several MB each (high-quality JPEG, HEIC, PNG). If you accumulate fifty of them, you easily take up 500 MB on your device. On an iPhone with limited storage, that's heavy. Delete the media you no longer need regularly.

If you organize your images in your own system. You already have a Lightroom, Capture One, or personal folder tree for your source images. The Calibration Flow HD media library duplicates it — use it just for images currently in process, not as a long-term archive.

#Worth remembering

#The test

Import an image into Calibration Flow, generate a negative. Go to the library → HD media tab. Your image should be there with its thumbnail and its name. Quit the app completely and reopen it. Go to HD media: your image should still be there. Click to reopen it — it should load instantly into the analysis module, as if you'd just imported it. Now delete the image from the library and try to reopen it: the app should tell you it no longer exists, prompting you to reimport.