Cutting out the product lets one photo serve several marketplaces: pure white for one, light grey for another, transparent for a third.
Edges are where cut-outs fail: hair, fur, sheer fabric and soft shadows need careful masks, and a hard edge looks pasted on.
What a cut-out is used for
A cut-out is the raw material of a product catalogue. Once the product is separated from its background, the same picture can be placed on white for a marketplace, on a brand colour for a shop, on a photo for a banner, or on nothing at all for a designer to use.
It also makes a mixed set of photos uniform. Products photographed on different days, tables and walls look like one series when they all stand on the same plain ground.
How a product is cut out
The older method is drawing: an editor traces the outline of the product by hand with a path, which gives a precise, hard edge and suits objects with clear contours. The newer method is automatic: software recognises the product and builds a mask, including soft transitions that a drawn path cannot follow.
Both produce the same thing in the end, a mask that says for every pixel whether it belongs to the product, to the background or partly to both. The partly matters; it is what makes hair, fur and fine fabric look natural.
Where cut-outs go wrong
The hard cases are always the same: fine edges such as hair, fringe, fur and lace; transparent or reflective materials such as glass, mesh and polished metal; and products whose colour is close to the background, such as a white shirt on a white wall.
Typical faults are a thin halo of the old background around the edge, missing parts where a strap or a handle was taken for background, and openings that were not cleared, such as the space inside a handle. Each of them is easy to miss on white and obvious on a dark colour.
Cut-out and related terms
Transparent background- A transparent background is what remains when the background is removed and nothing is put in its place. It is one way to deliver a cut-out, in a format that can store transparency.
- Clipping path
- A clipping path is the drawn outline used to cut a product out by hand. The path is a method; the cut-out is the result.
Pure white background- On a pure white background the cut-out sits on white of the highest value. It is the most common destination for a cut-out on marketplaces.
Silhouette image- A silhouette image is a product alone against a plain ground, with its outline easy to read. Most silhouette images are made from cut-outs.
- Drop shadow
- A drop shadow is the soft shadow added under a cut-out so that the product seems to stand on a surface. Removing the background usually removes the real shadow with it.
A checklist for a clean cut-out
- The whole product is there: straps, handles, laces, cables and thin parts were not removed with the background.
- The edge shows no halo of the old background colour, on a light ground and on a dark one.
- Openings are open: the space inside a handle, between chain links or behind a pierced pattern shows the new background.
- Soft edges stayed soft. Hair, fur and fringe do not end in a hard line.
- The product still has contact with the ground, through a soft shadow where the sales channel allows one.
- The file was saved in a format that keeps transparency, if a transparent background is what is needed.
