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负面提示词(Negative Prompt)是AI绘画中一个被低估但极其强大的工具。如果说正面提示词是"我要什么",那么负面提示词就是"我不要什么"。善用负面提示词可以显著减少AI生成中的常见问题,如畸形肢体、低质量纹理和不想要的元素。本文将全面解析负面提示词的使用策略。
负面提示词告诉AI模型在生成过程中应该避免哪些特征。它通过降低特定语义方向的权重,使生成结果远离不想要的特征空间。
lowres, bad anatomy, bad hands, text, error, missing fingers, extra digit, fewer digits, cropped, worst quality, low quality, normal quality, jpeg artifacts, signature, watermark, username, blurry
bad proportions, gross proportions, mutation, deformed, malformed, extra limbs, missing arms, missing legs, extra arms, extra legs, fused fingers, too many fingers, long neck, cross-eyed
cartoon, anime, 3d render, cgi, plastic, doll, sketch, rough, amateur, childish, oversaturated, underexposed, overexposed
deformed face, ugly face, bad face, extra face, double face, cloned face, asymmetrical eyes, bad teeth, bad nose, bad ears, wrinkled skin, acne, scars, makeup, lipstick
bad hands, malformed hands, extra fingers, missing fingers, fused fingers, too many fingers, mutated hands, poorly drawn hands, extra thumbs, missing thumbs
oversaturated, unnatural colors, artificial looking, plastic plants, fake sky, duplicated elements, mirrored horizon, tilted horizon, lens flare abuse
crooked lines, impossible architecture, floating elements, defying gravity, mismatched perspective, distorted windows, uneven floors, impossible stairs
通过排除相反风格来强化目标风格:
// 想要写实风格时排除:
cartoon, anime, illustration, painting, drawing, sketch
// 想要动漫风格时排除:
photorealistic, 3d render, realistic, photograph, hyperrealistic
排除不想要的色彩倾向:
// 想要冷色调时排除:
warm colors, orange tint, yellow cast, sepia
// 想要暖色调时排除:
cold colors, blue tint, green cast, monochromatic
bad composition, cluttered, chaotic, unbalanced, off-center subject, cut off, cropped head, cropped limbs
Stable Diffusion对负面提示词最敏感:
[bad hands:1.5]Midjourney的负面提示词功能相对简单:
--no参数:--no text, watermark, blurGPT Image 2没有专门的负面提示词输入框,但可以在描述中说明:
生成一张图片,不要有文字和水印,确保手指数量正确
不要一开始就堆砌大量负面提示词:
当生成结果出现问题时,按以下步骤诊断:
对于Stable Diffusion用户,可以使用预训练的负面提示词embedding:
EasyNegative, badhandv4, ng_deepnegative_v1_75t
bad hands, malformed hands, extra fingers, missing fingers, fused fingers, too many fingers, mutated hands, extra limbs
deformed face, ugly, asymmetrical face, bad anatomy face, cloned face, extra face, double face
low quality, worst quality, normal quality, jpeg artifacts, blurry, out of focus, noise, grainy, pixelated
bad composition, cropped, cut off, out of frame, bad framing, unbalanced, cluttered
正面:
masterpiece, best quality, portrait of a young woman, detailed face, natural lighting, photorealistic
负面:
lowres, bad anatomy, bad hands, text, error, missing fingers, extra digit, fewer digits, cropped, worst quality, low quality, normal quality, jpeg artifacts, signature, watermark, username, blurry, deformed face, ugly, asymmetrical eyes
正面:
masterpiece, best quality, anime style, cute girl, detailed eyes, colorful hair, school uniform
负面:
lowres, bad anatomy, bad hands, text, error, missing fingers, extra digit, fewer digits, cropped, worst quality, low quality, normal quality, jpeg artifacts, signature, watermark, username, blurry, photorealistic, 3d render, realistic
负面提示词是AI绘画质量控制的重要工具。通过系统性地学习和使用负面提示词,可以大幅减少生成结果中的常见问题,提升整体图像质量。建议建立个人的负面提示词库,并根据不同项目需求进行定制。记住,负面提示词不是万能的,最终的质量还需要正面提示词的精确描述和后期处理的配合。
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