SCIENCE

The science behind the analysis and the routines

How each Selfbaus measurement is produced, what the research says about perceived health and everyday routines, and where each claim stops. Each article separates literature, model output, our own design choices and what is not validated. The routines themselves are in Routines.

1. How Selfbaus Reads a Face Photo: Gate, Measure, ReportA step-by-step look at how Selfbaus checks a face photo on-device: the frame-check gate, deterministic measurements and the draft technical score, with every limit stated.
2. The 478-Point Face Mesh: What the Model Actually SeesWhat a 478-landmark face mesh is, how MediaPipe's Face Landmarker produces it from a single photo, and why mesh points are estimates rather than measured anatomy.
3. Head Pose: Why Yaw, Pitch and Roll Decide Whether a Photo Can Be MeasuredYaw, pitch and roll explained: how Selfbaus estimates head pose from a face mesh, why small tilts distort facial ratios, and why our pose limits are still unvalidated.
4. Camera Distance and Perspective: Why Close Selfies Change Your FaceHow shooting distance changes the apparent shape of a face, what research says about perspective distortion and the selfie effect, and what Selfbaus can and cannot tell about distance.
5. Photo Quality Measures: Sharpness, Noise and Exposure ExplainedHow Selfbaus measures sharpness (Laplacian variance), noise (an Immerkaer-style estimate) and exposure with clipping, what each number means and where each fails.
6. Perceived Health Cues in Faces: What Skin Color, Evenness and Sleep Studies FoundWhat experiments report about skin color distribution, skin redness and yellowness, diet and sleep as cues to perceived health and attractiveness, with the sample sizes and limits.
7. Everyday Routines: What Dermatology, Dental, Sleep and Activity Guidance Actually SaysA plain summary of what dermatologist, dental, CDC and NHS guidance says about skin, hair, teeth, sleep and activity routines, and how Selfbaus separates guidance from appearance claims.
8. Why Ratios, Not Millimetres: Iris-Distance Normalisation ExplainedWhy a single selfie cannot give absolute facial measurements, how Selfbaus normalises geometry by the distance between iris centers, and the limits of that choice.
9. Facial Symmetry: What the Research Says and What a Mesh Can MeasureWhat research says about facial symmetry and perceived attractiveness, how Selfbaus measures mirrored landmark displacement, and why a photo symmetry number is not a verdict on your face.
10. Facial Proportions, Thirds and FWHR: Definitions, Evidence and LimitsHow facial width, height and segment ratios are defined, what anthropometry and FWHR research report, and why Selfbaus treats frontal photo proportions as descriptive, not ideal.