lensrender op• 数据种类:table → table
• 调用: import fullseye as fs; fs.ledger.render_scene_through_lens(system, scene=None, sensor=None, pupil_samples=64, wavelengths=None, exposure_s=0.0001, illuminant=None, seed=0, defocus_mm=0.0, oversample=1, pupil_pattern='halton', pupil_uv=None, pupil_jitter=True, focus_mm=None, add_noise=True, output='float', band_nm=None, source_rings=24) -> 'dict'(要直接调用实现,import lensrender; lensrender.render_scene_through_lens(system, scene=None, sensor=None, pupil_samples=64, wavelengths=None, exposure_s=0.0001, illuminant=None, seed=0, defocus_mm=0.0, oversample=1, pupil_pattern='halton', pupil_uv=None, pupil_jitter=True, focus_mm=None, add_noise=True, output='float', band_nm=None, source_rings=24) -> 'dict';从台账取用则 opsoptics.get("render_scene_through_lens"))
• GPU:无(仅 CPU 参考实现)
透过处方 *system* 的镜头拍摄 lens_scene:从传感器一侧的光线追迹 -> 字典。
> 以下的详细说明为原文 —— 摘要与标题已翻译。
For every pixel (and oversample x oversample points inside it) and every wavelength, the exit pupil is sampled at pupil_samples points (Halton or hexapolar, each pixel's pattern turned by a fixed golden-ratio angle when *pupil_jitter* is on, so the noiseless image does not depend on *seed*), each ray is traced backwards through the lens (trace_sensor_rays), shaded in the scene (scene_radiance) and weighted by cos^2(theta) / d^2 times the pupil-sample area: the Monte Carlo estimate of E = integral L cos(theta) d(omega) over the exit pupil (Kolb, Mitchell & Hanrahan 1995), times (n_image / n_object)^2. Point sources of the scene are added by forward ray tracing. The spectral irradiance becomes electrons per wavelength, E dlambda A_pixel t (lambda / hc) QE(lambda), and the sum goes through the shot noise, the dark electrons, the read noise and the quantiser of lensimage._sensor (*add_noise* False returns the expected values). *sensor* is a dict {"pixel_pitch_um", "size": (rows, cols), "qe", "full_well", "read_noise_e", "dark_e", "bits", "center_mm"} (center_mm moves the window to another point of a larger sensor); *wavelengths* default to the F, d, C lines (each band is as wide as the spacing of the list, or *band_nm*); *illuminant* is the relative spectral shape of the scene's lights (pairs (nm, value)); *defocus_mm* moves the sensor along the light (positive = away from the lens) and *focus_mm* puts it at the paraxial image of an object at that distance (default: the system's own image plane); *oversample* subdivides each pixel. The picture is upright (see the module doc). The table has image (float in 0..1, or uint16 DN with output="uint16"), image_noiseless, channels / channels_noiseless (one image per wavelength, own noise), electrons_mean and electrons_per_wavelength, irradiance_W_m2_nm (K, H, W), pupil_transmission (H, W: the share of the pupil that is not vignetted), the wavelengths and the geometry. Geometric optics only: no diffraction.
optics 的每个算子都先校验输入再计算(不让任何东西无声通过):
• 单位写进参数名 —— _mm / _um / _deg / _mrad。把 mm 和 µm 弄混不会崩溃,而是给出「看着合理却是错的答案」,所以用命名来防。这里绝不从数值大小去猜单位。
• 字符串一律 ValueError —— float('50') 会成功,于是未解析的配置值会被当成长度混进来(实测:thin_lens('50', '200') 曾返回看着合理的 66.667 mm)。bool 也按 True == 1 的隐式提升拒绝。
• complex / masked array 一律 ValueError(仅接受实数槽位;拒绝无声丢弃虚部或剥掉掩码)。所有输入中的 NaN/Inf 一律 ValueError。
• 逐项点名拒绝除零及其近亲:焦距 0、曲率半径 0、折射率 <= 0、全不透明光阑(全为 0,归一化变成 0/0)、总和 <= 0 的 PSF、S0 = 0 的 Stokes 矢量、物体位于前焦点(像在无穷远)。
• 只有两个算子会返回非有限值,而且都写进了契约:depth_of_field 在超焦距以外返回 far_mm = inf(这正是超焦距的定义),gaussian_beam 在束腰处返回 wavefront_radius_mm = inf(平面波前的曲率半径)。两者都同时返回一个有限的搭档(far_is_infinite / curvature_per_mm)。除此之外的无声 NaN/Inf 都在内部检出并 ValueError ——「float64 溢出了」和「答案是无穷大」是两种不同的主张,不能拿后者的脸去交付前者。
• 尺寸上限:生成网格受 optics.MAX_GRID(4096)限制,传入的场/PSF/光阑受 optics.MAX_FIELD_ELEMENTS(2^24),ABCD 元件序列受 optics.MAX_SYSTEM_ELEMENTS(1024),Zernike 受 MAX_ZERNIKE_TERMS(512)/ MAX_ZERNIKE_ORDER(40)/ MAX_ZERNIKE_BASIS(2^25)。以 fail-closed 堵住「小参数引发巨大内部分配」的路径(实测:n_max=40 × 4096² 需要 108 GB)。
• 物理上不可能的状态同样拒绝:偏振度 > 1 的 Stokes 矢量、负透过率、负强度、n-|m| 为奇数等非法 Zernike 指标。
• 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_photograph_through_prescription — py -3.11 examples/poc_photograph_through_prescription.py
table 作为输入)abcd_matrix · wavefront_stats · sfr_from_edge · paraxial_trace · seidel_coefficients · spot_stats · tolerance_analysis · wavefront_from_opd
lensrender)lens_scene · exit_pupil_samples · trace_sensor_rays · scene_radiance · bokeh_shape · render_ghost_overlay · render_compare_prescriptions
*Provenance: lensrender.py — OPTICS 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.