How a two-photo body scan reads thirty-five measurements

A tailor takes about twenty minutes and a tape measure. MyLooke takes two photographs and about thirty seconds. The difference is not magic, and it is worth explaining plainly, because a measurement you do not understand is a measurement you will not trust.

What the camera is looking for

The scan begins with body pose detection, a standard capability of Apple's Vision framework. It locates the joints shoulders, elbows, wrists, hips, knees, ankles and returns their positions in the frame. On its own that is a stick figure, and a stick figure tells you nothing about girth. The second pass segments your silhouette from the background, giving a precise outline of where your body ends and the room begins. Joints tell us where to measure; the silhouette tells us how wide you are at that point.

Why two photos, not one

A single front-facing photograph gives you width and nothing else. Two people with identical shoulder widths can have very different chest girths, because one is deeper front-to-back than the other. The side photograph supplies that missing depth. With width from the front and depth from the side, each measurement point becomes an ellipse rather than a line, and an ellipse has a circumference. That is where a girth comes from.

Height anchors the whole thing. Every measurement is derived in proportion to a known reference, so entering your height accurately matters more than standing perfectly still. On iPhone Pro models, the LiDAR sensor adds a true depth reading and the scan is repeated to score its own repeatability how closely two consecutive attempts agree.

A measurement without a confidence score is just a guess wearing a number.

Confidence, not certainty

Every one of the thirty-five values carries its own confidence. A shoulder width read from a clean silhouette is dependable. A neck girth taken through a hood is not, and it says so. We would rather show you a number that admits its own uncertainty than one that pretends to be a tailor's tape.

All of this happens on the phone. The photographs are processed on-device and the scan is yours. It is worth stating, because body data is the most personal data a styling app can hold, and the honest position is the simple one: it stays with you.