Tag
“super resolution”
7 posts
- Technical Deep Dives··8 min read
Why Sharpening a Cutout Draws a Halo Around Fur
Upscale a cutout of a long-haired pet and a bright rim appears along the fur. The model did not do it. An alpha-blind sharpening pass did, by averaging in the black that sits behind every transparent pixel. Here is the mechanism, the fix, and exactly what the numbers behind it were measured on.
Technical Deep Dives··8 min readWhy AI Upscalers Leave Seams and Soft Edges, And How We Fixed Ours
An AI upscaler can sharpen a photo beautifully and still leave a faint grid across it, or a crisp subject with a strangely soft outline. Both are avoidable. Here is what actually causes them, and the two fixes we shipped.
Tutorials··8 min readYou Upscaled to 4x and It's Still Soft: Pick the Right Source Mode
You set the upscaler to 4x and the result still looks soft. Usually the fix is not more sharpening. It is telling the tool what kind of image it is looking at. A practical guide to the Source modes, and the honest limit no upscaler can beat.
Technical Deep Dives··6 min readThe Math Behind Upscaling a 176px Thumbnail to 2048px
A fixed "2×" turns 176px into a still-tiny 352px. Real upscaling of small inputs needs a pre-scale plan and cascaded passes. The arithmetic we use to get a thumbnail to a usable size.
Technical Deep Dives··8 min readAI Image Upscaling: Lanczos vs. Swin2SR vs. Real-ESRGAN, Which Is Best?
A practical comparison of three upscaling approaches: classic Lanczos interpolation, transformer-based Swin2SR, and GAN-based Real-ESRGAN. When each method wins, what to expect on different content types, and how to choose.
Tutorials··9 min readAI Image Upscaler Guide: When to Use 2× vs 4× Super-Resolution
A practical guide to AI super-resolution upscaling: how Swin2SR works, when to use 2× vs 4×, what to expect for different image types, and tips for best results.
Tutorials··8 min readRescuing Tiny, Low-Res Photos: Upscaling Old Images to 4K in Your Browser
That 640×480 photo from a 2006 digital camera doesn't have to stay small. A practical guide to AI upscaling old, low-resolution images to print-and-display size on your own device, what it can recover, what it can't, and the order of operations that works.