Tag
“image processing”
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- 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.
Technical Deep Dives··5 min readGrayscale, Sepia, and Invert: Classic Photo Effects in Your Browser
How grayscale conversion (luminance weighting), sepia tone (matrix transform), and invert effects work at the pixel level — and when to use each for product photography, branding, and art.