Embroidery digitising is the manual process of converting an image into stitch commands an embroidery machine can run. The resulting file specifies needle positions, stitch direction, density, stitch types, sequence, and colour changes. It is not an image export; it is a production plan built for thread and fabric.
Why is an image file not enough for an embroidery machine?
An image file says what colour appears at each point on a screen. An embroidery machine needs a sequence of exact needle movements. It must know where each stitch begins and ends, which area is sewn first, when the thread colour changes, and where the machine should travel next.
Between those two descriptions sits a chain of human decisions. A dark patch in a photograph might become a satin-stitched outline, a fill area, several directional sections, or no stitch at all. The right choice depends on its size, the surrounding shapes, the fabric, and whether that patch helps the face remain recognisable.
| Image file | Stitch file |
|---|---|
| Describes pixels or vector shapes | Describes a sequence of needle positions |
| Can display millions of colours | Uses selected physical thread colours |
| Does not account for fabric movement | Includes density, underlay, and pull compensation |
| Can show detail at any zoom level | Must sew cleanly at its final physical size |
Which decisions are made during digitising?
Stitch type controls how a shape is built. Satin stitches suit narrow columns and defined edges. Fill stitches cover broader areas with repeated rows. Choosing between them affects clarity, texture, stitch count, and how the design behaves on the garment.
Stitch direction changes how thread catches the light. On a pet portrait, several directions can make a flat colour area read as a forehead, cheek, or muzzle. Direction can suggest the flow of fur even though individual hairs are too small to reproduce.
Density controls how closely stitches sit together. Too little can leave gaps and expose too much fabric. Too much can make the design rigid, cause the fabric to pucker, and crowd small shapes until they lose definition.
In practice most fabrics sit at a stitch spacing of about 0.40 to 0.45 mm, which works out to roughly 100 stitches per cm² (about 656 per square inch), with lighter fabrics often taken down to around 67 stitches per cm². The number is counter-intuitive: it measures the gap between stitches, so a smaller value means denser stitching, not looser.
Underlay stitches form a hidden foundation beneath visible stitching. They stabilise the fabric and support the top layer so edges and filled areas remain controlled. The required foundation changes with the shape and the material being embroidered.
Sequence and colour changes determine the order in which the design is constructed. A sensible sequence reduces unnecessary travel, keeps overlaps clean, and places foreground features over the shapes behind them.
Pull compensation allows for the way thread tension draws fabric and stitched shapes inward. A shape may be programmed slightly wider than its intended finished width so it lands at the correct size after sewing.
Why is digitising done once for every design?
A stitch plan can be reused only when the same design, size, and production conditions are repeated. A company logo may be digitised once and applied to 500 garments. Its preparation cost is then spread across the whole run.
A made-to-order pet portrait is different. The eyes, muzzle, ears, markings, and colour boundaries belong to one animal. A new customer supplies a new photograph, which requires a new drawing and new embroidery digitising. When that plan is used for one item, the preparation never becomes cheaper through repetition.
This is the central cost story of custom embroidery pricing. Thread is a small input and the machine may run for minutes, but the machine cannot decide which details make a particular pet recognisable. The one-off human work happens before the machine starts.
How can you recognise good digitising?
Judge it on the finished garment, not only on a screen. A digital preview cannot show exactly how thread tension, stitch direction, and fabric movement will interact. The sewn result provides the useful evidence.
- The fabric lies flat: dense areas do not pull the garment into obvious ripples or puckers.
- Outlines are clean: borders meet filled areas without distracting gaps or heavy overlaps.
- Small shapes remain readable: eyes, nose, ears, and major markings do not collapse into one block.
- Stitch direction supports the subject: the thread helps the face read as fur and form rather than a flat patch.
- The reverse is tidy: necessary support remains, but the design is not crossed by avoidable jumps and tangled thread.
How does the process work at eragoya?
- You upload one pet photograph, up to 20 MB, with the order — which photo works best.
- A human draws the portrait and simplifies it for the intended embroidery size.
- The artwork is converted into machine-readable stitch commands.
- The actual design is emailed for approval, usually within two working days.
- You request any changes or approve it. Revisions are free and unlimited.
- The garment is stitched only after approval.
There is no instant preview before ordering because the drawing and stitch plan do not yet exist. The emailed approval design is the result of the work, not a filter placed over the uploaded photograph.
What else should you know about stitch files?
Can digitising be automated?
Software can generate stitches automatically, especially for simple shapes, but it cannot reliably decide which features make one pet recognisable at a small size. Manual review and adjustment are needed to control direction, density, sequence, underlay, and simplification on fabric.
What file format is an embroidery stitch file?
There is no single universal format. DST, PES, JEF, and EXP are common examples, and the required format depends on the machine and workflow. Unlike JPG or PNG, these files contain stitch instructions rather than a normal picture.
Can I have my stitch file?
The approval image you receive by email and the machine stitch file are different things. The stitch file is built for one design at one size on one garment, so it does not transfer usefully to another machine or size. If you have a reason to need it, email us and we will tell you what is possible.
Why is my design simplified?
Thread has a minimum practical width, a fixed colour palette, and physical thickness. At about 5 cm across on a cap, tiny markings and individual hairs must be merged or removed so the important facial shapes remain readable after stitching.
Sophie Mill writes eragoya’s guides to embroidery and production. Everything here is based on how the work is actually done — what a 5 cm stitched area can hold, what digitising involves, and what can honestly be promised before a design exists. Unsure whether your own photo will work? Send it to us before you order.