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Trey Moen
66b4dbe2a1
* qrcode: add QR decoder Decodes a QR code from a grayscale image or a module matrix: adaptive binarization, finder pattern search by run ratios, perspective sampling with alignment pattern refinement, format info, unmasking, block de-interleaving, Reed-Solomon correction, and numeric, alphanumeric, byte (with ECI), and Kanji segments. Fixtures are packed matrices from python-qrcode 8.2 covering every version and level, plus Segno 1.6.6 matrices for the ECI cases. * qrcode: tune decoder for the device Measured on a comma mici with real cabin frames downsampled to 672x380, the size the eSIM screen scans at. Per frame: 30 ms -> 8 ms with no code in view, 42 ms -> 13 ms with a code. - binarize: fixed two-radius fill from one integral image instead of an iterative outward fill (a dark cabin is almost all flat tiles), tile stats on a contiguous layout, flat tiles decided whole so sensor noise cannot become speckle, uint8 threshold compare - finder search: scan every 4th row, build column runs only at candidate columns - alignment search starts at a 2-module radius - Reed-Solomon syndromes through table lookups, placement order cached * qrcode: simplify decoder Fold the function-module mask into _data_coords and the format coordinates into _read_format, evaluate masks directly on the data coordinates, compact the ECI, numeric, and alphanumeric parsing, and flatten the retry loop in decode. No behavior change.