Release Scan Tools v0.1.0

2026-09-01 14:34:51 +02:00
commit 75cd6a6195
64 changed files with 11626 additions and 0 deletions
@@ -0,0 +1,26 @@
+# Architecture
+
+The React workbench owns an in-memory ordered list of source `File` objects and
+serializable page settings. No page content enters local storage. Each source is
+decoded with `createImageBitmap`; its dimensions and byte size are checked before
+it joins the workspace.
+
+The renderer downscales exceptionally large source rasters to a 24-megapixel
+working ceiling. A projective map sends every destination pixel through the four
+selected source corners and samples it bilinearly. A bounded pixel pass applies
+brightness, contrast, perceptual grayscale and optional Otsu/manual threshold.
+Canvas rotation handles quarter turns and the final ±5 degree deskew. Preview,
+OCR and export call the same renderer with different disclosed pixel budgets, so
+the preview semantics match the downloaded result.
+
+Deskew estimation downsamples to at most 420 pixels on the long edge, tests
+half-degree candidates from −5 to +5, and scores the horizontal projection of
+dark pixels. It declines to invent an angle when insufficient foreground exists.
+
+PDF export dynamically loads jsPDF, renders pages sequentially, JPEG-encodes
+each bounded page, and fits it into the selected physical page. OCR dynamically
+loads Tesseract.js only after user confirmation. Its worker, three LSTM-only
+runtime variants and English integer trained data are copied from pinned npm
+packages to same-origin release assets. Tesseract's persistent model cache is
+disabled, one in-memory worker is reused and can be terminated, and no fallback
+CDN path is used.