Image-to-Image (sana_img2img)

Restyle an existing image at Sana-Sprint speed.

from strands_sana import sana_img2img

sana_img2img(
    prompt="anime cel-shaded style, vibrant colors",
    image_path="source.png",
    model="sana-sprint-i2i-1.6b-1024",
    strength=0.6,    # 0..1: how much to change
    steps=2,         # Sprint sweet spot for img2img is 2-4
    seed=42,
)

How strength works

strength	effect
0.0	unchanged source
0.3	subtle restyle, preserves layout
0.5	balanced
0.7	strong reinterpretation
1.0	full regeneration (ignores source)

Demo

Source

strength=0.5
"anime cel-shaded"

strength=0.6
"oil painting"

Tips

• Sprint Img2Img doesn't accept negative_prompt or CFG (model is distilled)
• For more denoising control, use full Sana with manual init noise (advanced)
• 2 steps is fastest; 4 steps gives better fidelity