post op• 数据种类:rgb → rgb
• 调用: import fullseye as fs; fs.ledger.bloom(rgb, threshold=0.8, sigma=4.0, intensity=0.6)(要直接调用实现,import gfx2d; gfx2d.bloom(rgb, threshold=0.8, sigma=4.0, intensity=0.6);从台账取用则 opsgfx2d.get("bloom"))
让图像的明亮部分向周围渗出。
> 以下的详细说明为原文 —— 摘要与标题已翻译。
The classical three steps: isolate what is above threshold, blur it by a Gaussian of sigma, add intensity times the result back, clip.
A *linear-light* operator: light spreading in a lens adds radiance. Running it on sRGB-encoded values makes the halo too strong in the mid-tones — srgb_to_linear first, linear_to_srgb after.
Exact identities: intensity=0 and threshold >= 1 both return the input bit for bit, and a black image stays black.
The added energy is *not* conserved by the clip at the end. The suite measures both halves: on a centred bright blob the Gaussian preserves the bright mass to 5.0e-16 relative, so everything lost after that is the clip — on a random scene with a saturated square, 2.69 % of the pixels clip and 1.65 % of the total energy is thrown away, and neither number is returned to the caller.
• 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。
• gfx2d_scene — py -3.11 examples/gfx2d_scene.py
• poc_public_camera_heading_real — py -3.11 examples/poc_public_camera_heading_real.py
rgb 作为输入)srgb_to_linear · linear_to_srgb · blend_mode · light_mask · normal_map_decode · vignette · chromatic_aberration · film_grain
post)vignette · chromatic_aberration · film_grain · color_lut · color_grade · dither · palette_quantize
*Provenance: gfx2d.py — GFX2D 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.