Planalta Artwork Rectifier

Give photographed artwork its shape back. Planalta is an offline four-corner perspective tool for flat artwork, posters and drawings. Select an image, place the corners clockwise, choose known original proportions and create separate files. • Drag corners with a source-pixel loupe, enter exact working-pixel coordinates or nudge by one pixel. • Choose familiar ratios or enter original width and height in the same units. Edge estimates are explicitly approximate. • Inspect a 1000px preview, then open the real delivery images at their full resolution and zoom up to 8×. • Create 1–5 unique PNG/JPEG sizes with 320–4096px longest edge. PNG retains transparency; JPEG uses quality 95 on white. Output may upscale your selection. • Save individual images or a real ZIP with images, WorkingSource.png, Planalta-settings.json and a SHA-256 manifest. The manifest records dimensions, transform and payload hashes. • Keep up to 20 local artworks, rename them, duplicate revisions and confirm deletion. Saved settings survive restart. • Save the original separately. Resume a backup by importing WorkingSource.png and confirming its matching settings JSON. Restore requires exact oriented working pixels and dimensions. • Share a ZIP with Android’s chooser or copy its actual hash. Supported images and limits Still JPEG, PNG and WebP; HEIF/AVIF depend on device codecs. No animation or RAW. Input 80MiB and 80 megapixels maximum. The oriented sRGB working copy is capped at 4096px longest edge. Original EXIF and other metadata are not embedded in outputs. Ratios range from 1:4 to 4:1. The private library holds 20 artworks and 512MiB of original/working files. Delivery payloads are limited to 120MiB. Editing invalidates previous delivery. Two recent batches may remain in cache, which Android can clear; files you save elsewhere remain there. Keep independent originals and backups. A visually similar or recompressed image may not match saved settings. This performs projective correction of a flat subject. It does not correct lens distortion, flatten curved pages, recognize text, calibrate color or restore missing detail. It is not a print color proof or certified measurement tool. Inspect results in your intended workflow. No accounts, ads, analytics, subscriptions, in-app purchases, network, camera or broad storage permission. Android automatic backup is disabled. You choose files, destinations and sharing recipients. Other document providers, recipient apps and browsers follow their own policies. Controls support English and Korean. Android and iPhone/iPad editions are separate purchases.

Initial Android edition with four-corner perspective correction, durable artwork settings, real PNG/JPEG delivery and source-bound backups.