How it works
Mature Skin is a texture-respecting tone treatment, not an age transformation. It requires one complete near-front face, cross-checks dedicated face detection with MediaPipe Face Mesh V2, and uses MediaPipe six-class portrait segmentation to distinguish verified face skin from hair, beard, body, clothing, accessories, and background. Exactly three bounded zones cover safe skin on the forehead and both cheeks; dilated face-mesh masks protect the eyes, irises, eyebrows, nose, and lips. Inside those zones, a skin-mask-normalized local baseline measures broad variation in the two LAB chroma channels without importing color from nearby hair, beard, or background. The renderer does not alter LAB luminance, and each chroma correction is capped at two levels at full intensity. Wrinkles, pores, fine texture, age cues, facial geometry, expression, and source lighting therefore remain anchored to the uploaded photo. Eyes, irises, eyebrows, nose, lips, inner mouth, hair, beard, clothing, background, framing, uploaded alpha, and every pixel outside the three reported zones are copied unchanged into a lossless PNG. It never ages, de-ages, smooths, blurs, sharpens, reshapes, inpaints, or regenerates the person. Profiles, incomplete or tiny faces, uncertain or incomplete face-skin evidence, obstructions, and already-even skin are refused or left unchanged rather than redrawn.
