
15 個值得嘗試的 API 設(shè)計工具
關(guān)鍵參數(shù)說明:
guidance_scale
:引導(dǎo)強(qiáng)度(建議值2.0-5.0)steps
:迭代步數(shù)(平衡質(zhì)量與速度)seed
:隨機(jī)種子(確保結(jié)果可復(fù)現(xiàn))from diffusers import FluxKontextPipeline
import torch
pipe = FluxKontextPipeline.from_pretrained(
"black-forest-labs/FLUX.1-Kontext-dev",
torch_dtype=torch.float16
)
pipe.to("cuda")
image = pipe(
image=load_image("input.png"),
prompt="Change background to beach at sunset, keep subject unchanged",
guidance_scale=3.0
).images[0]
image.save("edited.png")
注意:dev版本需遵守非商業(yè)許可協(xié)議,部署時必須配置安全過濾器:
pip install git+https://github.com/black-forest-labs/flux-safety-checker
Kontext 的性能高度依賴提示詞質(zhì)量,以下是經(jīng)過驗證的最佳實踐:
編輯類型 | 模板結(jié)構(gòu) | 示例 |
對象修改 | Change [對象] to [新狀態(tài)], keep [保留內(nèi)容] | Change car color to red, keep background |
風(fēng)格遷移 | Transform to [風(fēng)格], maintain [保留元素] | Transform to oil painting, maintain composition |
背景替換 | Change background to [場景], keep subject position | Change to forest, keep dog in center |
文本編輯 | Replace '[原文本]' with '[新文本]' | Replace 'OPEN' with 'CLOSED' |
“Change hairstyle to ponytail, maintain same facial features and eye color”
“Add sunglasses, do not alter background and clothing”
“Replace 'CAFE' with 'BOOKSTORE' using sans-serif bold font”
# 批量更換背景示例
batch_images = ["product1.jpg", "product2.jpg", "product3.jpg"]
for img in batch_images:
output = pipe(
image=load_image(img),
prompt="Place on marble background with natural shadow",
guidance_scale=2.8
)
upload_to_cdn(output.images[0])
價值點:單次操作節(jié)約設(shè)計師2小時/圖
“Crop to 9:16 ratio, add vibrant Instagram filter”
“Convert to CMYK, add 3mm bleed area”
“Highlight text ’50% OFF’ with glow effect”
通過保留中間狀態(tài)實現(xiàn)零質(zhì)量衰減迭代
const promises = imageArray.map(img =>
replicate.run(model, { input: { prompt, image: img } })
);
await Promise.allSettled(promises);
pipe.enable_c2pa_metadata("your_org")
from flux_safety import SafetyChecker
checker = SafetyChecker()
if checker.is_unsafe(output):
raise ContentPolicyViolation
典型響應(yīng)結(jié)構(gòu):
{
"id": "1981b99c-a825-4d19-adc6-7dda6118c4ea",
"polling_url": "https://api.endpoint/flux/v1/get_result?id=1981b99c..."
}
通過輪詢polling_url
獲取生成結(jié)果
常見錯誤處理:
502 Bad Gateway
:模型初始化中,等待2-3分鐘后重試CUDA out of memory
:切換float16精度或減小圖像尺寸Prompt rejected
:觸發(fā)安全過濾器,修改提示詞內(nèi)容FLUX.1 Kontext 通過其流匹配架構(gòu)和上下文理解能力,正在重塑圖像編輯的工作流。隨著開源生態(tài)的完善(ComfyUI節(jié)點、Diffusers集成),其應(yīng)用場景正從專業(yè)設(shè)計領(lǐng)域擴(kuò)展至電商、新媒體、游戲開發(fā)等全行業(yè)。
15 個值得嘗試的 API 設(shè)計工具
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