stable-diffusion txt2img参数整理_stable diffusion参数文档sdapi/v1/txt2img

Sampling steps ：采样步骤”：“迭代改进生成图像的次数；较高的值需要更长的时间；非常低的值可能会产生糟糕的结果”，

指的是Stable Diffusion生成图像所需的迭代步数。每增加一步迭代，都会给AI更多的机会去比对提示和当前结果，并进行调整。更高的迭代步数需要更多的计算时间。但高步数并不一定意味着更好的结果。当然，如果迭代步数太少，会降低生成图像的质量。

Sampling method：“采样方法”：“使用哪种算法生成图像”，

('Euler a', 'sample_euler_ancestral', ['k_euler_a', 'k_euler_ancestral'], {}),

('Euler', 'sample_euler', ['k_euler'], {}),

('LMS', 'sample_lms', ['k_lms'], {}),

('Heun', 'sample_heun', ['k_heun'], {}),

('DPM2', 'sample_dpm_2', ['k_dpm_2'], {'discard_next_to_last_sigma': True}),

('DPM2 a', 'sample_dpm_2_ancestral', ['k_dpm_2_a'], {'discard_next_to_last_sigma': True}),

('DPM++ 2S a', 'sample_dpmpp_2s_ancestral', ['k_dpmpp_2s_a'], {}),

('DPM++ 2M', 'sample_dpmpp_2m', ['k_dpmpp_2m'], {}),

('DPM++ SDE', 'sample_dpmpp_sde', ['k_dpmpp_sde'], {}),

('DPM fast', 'sample_dpm_fast', ['k_dpm_fast'], {}),

('DPM adaptive', 'sample_dpm_adaptive', ['k_dpm_ad'], {}),

('LMS Karras', 'sample_lms', ['k_lms_ka'], {'scheduler': 'karras'}),

('DPM2 Karras', 'sample_dpm_2', ['k_dpm_2_ka'], {'scheduler': 'karras', 'discard_next_to_last_sigma': True}),

('DPM2 a Karras', 'sample_dpm_2_ancestral', ['k_dpm_2_a_ka'], {'scheduler': 'karras', 'discard_next_to_last_sigma': True}),

('DPM++ 2S a Karras', 'sample_dpmpp_2s_ancestral', ['k_dpmpp_2s_a_ka'], {'scheduler': 'karras'}),

('DPM++ 2M Karras', 'sample_dpmpp_2m', ['k_dpmpp_2m_ka'], {'scheduler': 'karras'}),

('DPM++ SDE Karras', 'sample_dpmpp_sde', ['k_dpmpp_sde_ka'], {'scheduler': 'karras'}),

采样方法的特征

    1.Euler  a ：是个插画，tag利用率仅次与DPM2和DPM2 a，环境光效菜，构图有时很奇葩 

    2.Euler：柔和，也适合插画，环境细节与渲染好，背景模糊较深。

    3.Heun：单次出图平均质量比Euler和Euler a高，但速度最慢，高step表现好。

   4.DDIM:适合宽画，速度偏低，高step表现好，负面tag不够时发挥随意，环境光线与水汽效果好，写实不佳。

    5.DPM2:该采样方法对tag的利用率最高，几乎占80％+

    6.DPM2 a：几乎与DPM2相同，对人物可能会有特写

    7.PLMS: 单次出图质量仅次于Heun。

    8.LMS: 质感OA,饱和度与对比度偏低，更倾向于动画的风格

    9.LMS Karras：会大改成油画的风格，写实不佳。

    10.DPM fast：此为上界开发者所遗留的测试工具，不适合魔术师使用

“CFG scale”：“分类器自由引导量表-图像应在多大程度上符合提示-较低的值会产生更具创造性的结果”，

这类似于DD中的CGS参数。较高的数值将提高生成结果与提示的匹配度，同时也会增加结果图片的饱和度和对比度，使颜色更加平滑，但纹理较少。但当数值高于20时，效果可能会变差。

“seed”：“一个决定随机数生成器输出的值-如果你创建一个与另一个图像具有相同参数和种子的图像，你会得到相同的结果”，

：“将种子设置为-1，这将导致每次使用一个新的随机数”，

循环：“\u267b\ufe0f”：“重复使用上一代的种子，如果是随机的，则非常有用”，

人物负面描述

multiple breasts, (mutated hands and fingers:1.5 ), (long body :1.3), (mutation, poorly drawn :1.2) , black-white, bad anatomy, liquid body, liquid tongue, disfigured, malformed, mutated, anatomical nonsense, text font UI, error, malformed hands, long neck, blurred, lowers, low res, bad anatomy, bad proportions, bad shadow, uncoordinated body, unnatural body, fused breasts, bad breasts, huge breasts, poorly drawn breasts, extra breasts, liquid breasts, heavy breasts, missing breasts, huge haunch, huge thighs, huge calf, bad hands, fused hand, missing hand, disappearing arms, disappearing thing, disappearing calf, disappearing legs, fused ears, bad ears, poorly drawn ears, extra ears, liquid ears, heavy ears, missing ears, fused animal ears, bad animal ears, poorly drawn animal ears, extra animal ears, liquid animal ears, heavy animal ears, missing animal ears, text, UI, error, missing fingers, missing limb, fused fingers, one hand with more than 5 fingers, one hand with less than 5 fingers, one hand with more than 5 digit, one hand with less than 5 digit, extra digit, fewer digits, fused digit, missing digit, bad digit, liquid digit, colorful tongue, black tongue, cropped, watermark, username, blurry, JPEG artifacts, signature, 3D, 3D game, 3D game scene, 3D character, malformed feet, extra feet, bad feet, poorly drawn feet, fused feet, missing feet, extra shoes, bad shoes, fused shoes, more than two shoes, poorly drawn shoes, bad gloves, poorly drawn gloves, fused gloves, bad cum, poorly drawn cum, fused cum, bad hairs, poorly drawn hairs, fused hairs, big muscles, ugly, bad face, fused face, poorly drawn face, cloned face, big face, long face, bad eyes, fused eyes poorly drawn eyes, extra eyes, malformed limbs, more than 2nipples, missing nipples, different nipples, fused nipples, bad nipples, poorly drawn nipples, black nipples, colorful nipples, gross proportions. short arm, ((missing arms)), missing thighs, missing calf, missing legs, mutation, duplicate, morbid, mutilated, poorly drawn hands,more than 1 left hand, more than 1 righthand, deformed, (blurry), disfigured, missing legs, extra arms, extra thighs, more than 2 thighs, extra calf, fused calf, extra legs, bad knee, extra knee, more than 2 legs, bad tails, bad mouth, fused mouth, poorly drawn mouth, bad tongue, tongue within mouth, too long tongue, black tongue, big mouth, cracked mouth, bad mouth, dirty face, dirty teeth, dirty pantie, fused pantie, poorly drawn pantie, fused cloth, poorly drawn cloth, bad pantie, yellow teeth, thick lips, bad camel toe, colorful camel toe, bad asshole, poorly drawn asshole, fused asshole, missing asshole, bad anus, bad pussy, bad crotch, bad crotch seam fused anus, fused pussy, fused anus, fused crotch, poorly drawn crotch, fused seam, poorly drawn anus, poorly drawn pussy, poorly drawn crotch, poorly drawn crotch seam, bad thigh gap, missing thigh gap, fused thigh gap, liquid thigh gap, poorly drawn thigh gap, poorly drawn anus, bad collarbone, fused collarbone, missing collarbone, liquid collarbone, strong girl, obesity, worst quality, low quality, normal quality, liquid tentacles, bad tentacles, poorly drawn tentacles, split tentacles, fused tentacles, missing clit, bad clit, fused clit, colorful clit, black clit, liquid clit, QR code, bar code, censored, safety panties, safety knickers, beard, furry ,pony, pubic hair, mosaic, excrement, faces, shit, Futa, testis

耗时排名

第一梯队：DDIM, PLMS

第二梯队：Euler a, Euler, LMS, DPM++ 2M, DPM fast, LMS Karras

第三梯队：Heun, DPM2, DPM2 a, DPM++ 2S a, DPM++ SDE, DPM2 Karras, DPM2 a Karras, DPM++ 2S a Karras, DPM++ 2M Karras, DPM++ SDE Karras

第四梯队：DPM adaptive

DDIM是用时最短的采样方式之一