read_pod op• 数据种类:table → table
• 调用: import fullseye as fs; fs.ledger.symbol_read_trials(symbol, factor, levels, *, trials=20, reader='auto', symbologies=None, truth=None, module_px=4.0, render=None, capture=None, rotate='random', rotate_jitter_deg=5.0, level_jitter=0.0, refine=False, seed=0)(要直接调用实现,import symbolpod; symbolpod.symbol_read_trials(symbol, factor, levels, *, trials=20, reader='auto', symbologies=None, truth=None, module_px=4.0, render=None, capture=None, rotate='random', rotate_jitter_deg=5.0, level_jitter=0.0, refine=False, seed=0);从台账取用则 opssymbol.get("symbol_read_trials"))
• GPU:无(仅 CPU 参考实现)
在每个退化水平下对符号拍摄并读取 trials 次,返回每次一行的结果表(table)。
> 以下的详细说明为原文 —— 摘要与标题已翻译。
For each level of the degradation factor (see DEGRADATION_FACTORS), render the symbol (symrender.render_symbol), capture it (symrender.capture_degrade) and read it (symbol_read), trials times with fresh nuisance: in-plane rotation (rotate="random": uniform over 360° for 2-D symbols, ±rotate_jitter_deg around 0 for 1-D; a number fixes it), a sub-pixel offset in [0, 1) px and the sensor-noise seed. For a 1-D table the reader is restricted to the table's own symbology unless symbologies is given (a line reader enables only what it expects; all-symbology reading short-reads). render / capture hold the fixed settings of the other knobs; the sensor defaults to full_well_e = 20000, read_noise_e = 10, 8 bits. truth defaults to the table's text.
Returns columns level, trial, hit (1 = read the true text), misread (1 = read a different text), noread, text (object array), plus factor, worse_when_larger, truth, reader, stage.
level_jitter (relative, default 0) multiplies each trial's actual level by 1 + level_jitter · N(0, 1) while the table keeps the nominal level — the process variation of the line (e.g. part height moving the focus). It is a declared assumption, not a fit knob.
refine=True first runs every level with max(4, trials // 4) trials, brackets the transition (the last level read >= 95 % and the first read <= 5 %, in the order of increasing degradation) and then runs len(levels) evenly spaced levels across that bracket with trials each (stage = "coarse" / "fine"; both enter the table). Without it a coarse sweep easily ends in complete separation.
空の入力(levels が 3 未満)は ValueError。拒否(ValueError): 未知の factor、trials < 1、水準の重複・非有限、render / capture に掃引中の因子と同じ鍵、読み取り器を決められない表。
• 示例数据目录(下载 URL / 许可证) —— 2-D 用 skimage.data(BSD/公有领域)加合成图,3-D 给出真实数据源(Stanford/PDS 等)的下载 URL。
• 算子来历与参考文献 —— 该算子族所依据的研究/方法出处。
• 算法的正典(作者、年份)与用途见上面的族使用指南。
• poc_symbol_package_1d — py -3.11 examples/poc_symbol_package_1d.py
• poc_symbol_part_dpm — py -3.11 examples/poc_symbol_part_dpm.py
table 作为输入)render_symbol · symbol_read_pod · ocr_classify · ocr_read_line · ocr_read_trials
read_pod)*Provenance: symbolpod.py — SYMBOL 算子登记表。本条目由 tools/opdocs.py md 自动生成(请勿手工编辑)。*
© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.