product-upscaling-4klisted

# Upscaling to 4K `edit_image` supports upscaling. APImage generates at SD, HD, Full HD and 4K, and upscaling is how you get an existing image — supplied, legacy, or generated small — up to what a marketplace or a print job needs. The important limit: **upscaling adds pixels, not information.** It makes a small sharp image into a large sharp image. It does not make a blurry image sharp. ## When you need the resolution | Use | Minimum | Preferred | |---|---|---| | Marketplace main image | 1000px+ | **1600px+ for zoom** | | Amazon zoom feature | 1600px on the longest side | 2000px+ | | Print and packaging | 300dpi at final size | 4K master | | Web hero | Full HD | 4K if it'll be cropped | | Social | HD | Full HD | | Master for cropping into ratios | — | **4K** | **Zoom is the one that catches people.** Several marketplaces only enable their zoom viewer above a threshold, and listings with zoom convert better. An image at 999px doesn't just look smaller — it silently disables a conversion feature. ## The call ``` edit_image( image="<source image>", prompt="Upscale to 4K. Preserve the product exactly — same shape, " "label, colour and proportions. Increase detail in fabric " "texture and label print. No changes to composition or " "lighting." ) ``` Two clauses that matter: **"Preserve the product exactly."** Upscaling models invent detail, and invented detail on a product is a misrepresentation. Constrain it. **Name where detail should inc