Sharpen a product photo without the white halo
A white rim around a product is the one sharpening fault a buyer notices without knowing what it is: the outline looks cut out and pasted on. It appears because an unsharp mask lifts the light side of every edge, and on a white sweep the light side is the background. This page measures the sweep first and then holds it: the sharpened result may darken the product side of an edge as usual, but nothing that started at the background's tone is allowed to end up brighter than it.
| Setting | Here | General sharpener |
|---|---|---|
| Starting preset | Product: 100 %, 0.8 px | Measured from the photo |
| White rim against the sweep | Held at the sweep's tone | Limited by the overshoot clamp |
| Background reading | Border of the frame, shown in the panel | Not read |
| Output size | Optional longest edge | Same as opened |
Sizing for a listing
Shops and marketplaces publish their own image sizes and change them; check the seller help of the one you use. Type its longest edge into the panel and Save writes the photo at that size: reduced by area averaging, which keeps fine edges clean, then given a light screen sharpen on the new grid, because resizing softens a little. A size larger than the photo is ignored rather than invented.
Related on this site
- For any photo already made smaller: sharpen after resizing.
- For a cut-out product on a transparent background: sharpen a PNG.
- For a whole folder of listing photos: batch sharpen photos.
Questions: sharpen a product photo
Why does sharpening give my product a white outline?
Sharpening brightens the light side of every edge. Against a white or light-grey sweep, the light side is the background itself, so the pass draws a band brighter than the sweep around the product — the white halo. This page reads the background's tone from the border of the frame and will not let any pixel that started at or below that tone come out brighter than it.
Does the guard make the product softer?
No. It only stops pixels from being pushed past the background's own tone. The dark side of each edge, the product's texture and its highlights brighter than the sweep are left to the ordinary halo clamps, so the edges keep their bite.
What if my product is on a dark or busy background?
The page reads the border, finds it is not one light, even tone, and starts with the guard off, saying so. The product preset and the usual overshoot and undershoot clamps still apply, and the guard can be switched on by hand.
What size should a listing photo be?
It depends on the shop or marketplace, and their own seller help pages give the current numbers, so this page does not assert any. Enter the longest edge they ask for: the photo is reduced by area averaging and given a light screen sharpen on the new grid, with the rim guard still on. It is never enlarged.
Is my product photo uploaded?
No. The photo is decoded by your browser and every pass runs in this tab on your own device. There is no upload endpoint on this site.
