Blind RIE denoising A new optimal-shrinkage method that works without a clean reference image. It runs alongside the classical Marchenko-Pastur and generalized-covariance results, so you can compare all three on the same noisy stack and see the PSNR each one achieves. Built-in "How to use" guide Opens the first time you launch the app, and is always available from the ? button in the top right. It walks through the whole workflow -- getting images, choosing a test image and a method, reading the PSNR and rank figures -- and explains in plain language what the a, beta and y parameters actually mean. Interface refinements across the Datasets and Image Processing tabs.

Version 1.2 • Datasets tab redesigned with a single-source-of-truth Storage bar at the top: Storage path, Change / Reset / Reveal in Finder, plus live pills for image count, dataset count, and total size on disk. The Add data card no longer competes with a duplicate Storage row, so it's always obvious where downloads and imports actually land. • Two-column Datasets layout: Add data + Download presets on the left, full-width Manage datasets library on the right. Replaces the previous five-card vertical stack that wasted space and looked like a phone UI. • High-tech dataset library: search box, header pills (folders / images / size), adaptive grid of dataset tiles each with name, last-modified timestamp, image / size chips, and Load · Reveal · Trash actions. The currently-loaded folder gets a gradient ACTIVE badge. • Import folder / Import images: pick a folder of pictures or a batch of files anywhere on disk and EigenDenoise recursively copies them into Storage under a uniquely-named sub-folder, handling filename collisions automatically. Works under the App Store sandbox without per-file bookmarks. Replaces the old "Browse…" / "Change folder…" pickers that failed on parent folders containing only sub-folders. • Storage picker now honors the user's choice immediately, even when the security-scoped bookmark write fails. Previously, a silent bookmark error left Storage stuck on the default Application Support folder. • Image Processing thumbnails are now paginated — 48 per page with First / Prev / Next / Last buttons, "X–Y of N" range label, and a direct "Page X / N" jump field. Previously the grid was hard-capped at 36 images and the rest were unreachable. • Full-window UI: removed the 1300pt content cap so all tabs fill the window in fullscreen instead of leaving empty bands on big displays.

Version 1.1 • Real Metal (GPU) acceleration: the SVD now runs on the GPU via the n×n Gram trick when the device picker is set to MPS or Auto. Big speedup on Apple Silicon for the Image Processing pipeline. • Fixed Generalized-Covariance method: the diagonal T(a, β) shrinker is now correctly applied in eigen-space rather than to raster-scan pixels, so the Gen-Cov tile reflects the true RMT estimator. • Live progress bars on the Image Processing and Eigenvalue Distribution tabs — the UI no longer freezes during long runs. • Tap any output tile (Original / Noisy / M-P / Gen-Cov) to highlight that method's kept eigenvalue range in the spectrum chart. • Built-in Netpbm / PGM decoder so the ORL Faces preset loads correctly after download. • Datasets tab redesign with three large preset tiles (ORL Faces, Brain MRI, custom URLs) and a click-through URL list with full destination preview. • Folder + test-image selection moved into the Image Processing tab; Folder Management renamed to Datasets. • Brain MRI preset switched to a 3,264-image dataset; ORL Faces points at a working 400-PGM mirror. • Help menu now links to the research paper and the GitHub repo; the paper link is also surfaced in the Eigenvalue Distribution and Image Processing tabs. • Various stability fixes: stale folder state is cleared synchronously when switching folders, and downloaded datasets auto-load without a security-scoped bookmark prompt.