HALVANE

Select the pattern.
Keep the picture.

Target periodic print and scan interference with paired frequency selections. Compare the same image before and after processing, then save real PNG files.

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Actual Android before and after comparison of a fictional patterned harbor print — Actual app capture. Fictional Harbor study imported through Android Files; no preloaded buyer records.

Select on the real spectrum.

Choose an isolated bright peak and its conjugate mirror is selected automatically. The center is protected. On a tablet, keep the working image beside the spectrum and adjustments.

Actual Android tablet working image with spectrum and controls

Inspect the same pixels.

Move the comparison divider and inspect a center crop at 4×. Save per-image treatments and undo session adjustments. Export cleaned, comparison and spectrum PNGs, settings JSON or an actual ZIP image package.

Actual Android same-pixel center detail comparison

A selective tool, checked by you.

Working copies have a maximum long edge of2048 pixels. Wider selections can remove useful detail. This is not arbitrary grain removal, AI restoration, print-color calibration or a guarantee to remove every moiré. Inspect blur, ringing and detail loss before use.

Select the pattern.Keep the picture.

Select on the real spectrum.

Inspect the same pixels.

A selective tool, checked by you.

Select the pattern.
Keep the picture.