What makes a good photo for conversion?

Shoot the part straight on, fill the frame, use even lighting and a plain background, and keep the camera parallel to the face you care about to avoid perspective distortion.

How does the drawing get the right size?

You provide one measured reference dimension. The tool scales the whole drawing from that single number, so the geometry matches the real part.

How do I convert a photo into a technical drawing?

The four steps

Photograph the part. Straight on, filling the frame, with even light and a plain background.
Upload it. The AI reads the outline, holes and symmetry and lays out the orthographic views.
Set one measurement. Enter the true length of any feature so the whole drawing is scaled correctly.
Confirm and export. Check the dimensions that matter, then export to DXF, DWG, SVG or PDF.

What makes a good source photo

The conversion is only as good as the input. Keep the camera parallel to the face you care about, because shooting at an angle bends straight edges and throws off the proportions. High contrast between the part and the background helps the AI find clean outlines.

Why one measurement matters

A photo gives shape, not size. Entering a single measured dimension removes that ambiguity and anchors every other dimension on the sheet. This is the difference between a drawing you can build from and a nice-looking picture. We explain the underlying reason in what a photo can never tell you.