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Allison_DeleonE's avatar
Allison_DeleonE
Iron Contributor
Sep 04, 2026

How can I convert a low-quality image to high-quality without watermark?

I have hundreds of old photos that look pretty rough when viewed on a larger screen. They're small, slightly blurry, and some of the details aren't very clear. Simply increasing the image dimensions ...
Weiona's avatar
Weiona
Tin Contributor
Sep 04, 2026

The term "upscale" itself can be confusing because it refers to both the action and a specific piece of software. If you're looking into how to convert a low-quality image to high-quality, you might have encountered a CLI tool called upscale on GitHub. This is a cross-platform, command-line toolkit designed to upscale images and videos using open-source AI models. It's a free and self-hosted solution, meaning it processes your files offline without uploading them.

The upscale CLI can handle different kinds of content, like photos or digital art, using different AI models.

Command Structure: You generally run a command like this:

upscale image -i input.jpg -o output.png -a realesrgan -s 4 -q 3

Options Explained:

  • -a: Selects the AI engine (like realesrgan for general photos).
  • -s: Sets the upscale factor (e.g., 4 for 4x enlargement).
  • -q: Controls the quality preset.

 

To use this specific upscale tool for how to convert a low-quality image to high-quality, you will need to set it up first, which involves installing dependencies like Go and Python.