Photo Age Test
Discover how old your face really looks. Our AI analyzes your biomarkers in seconds.
Upload or Take Photo
Use a clear, well-lit photo looking directly at the camera.
Privacy Guarantee (GDPR Gold Standard): We use RAM-only processing. Your photo is analyzed in temporary memory and instantly deleted. It is never saved to a disk, database, or cloud storage. Disclaimer: This tool uses AI to estimate age based on visual biomarkers. Results are for informational and entertainment purposes only and do not constitute a medical diagnosis or health advice.
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Check after your photo test how your lifestyle choices change the way you age.
Age Estimation Architecture
01The Core Problem: Context Dependency
Standard commercial age estimation tools rely on shallow CNNs trained on tight face crops. These fail in "in-the-wild" conditions because they discard the most critical signal: context.
The Solution: We utilize a dual-stream transformer architecture (MiVOLO). To solve the problem of missing context, the model mathematically models the dependency between a subject's biometric features and their global context (posture, body type, attire).
02Step 1: Isolating the Signal (Localization)
The First Challenge: Before the model can analyze context, it must deterministically pair a specific face with its specific body in a crowded image.
We begin by isolating the signal using a custom-trained object detection model that regresses bounding boxes for two classes: Face and Person.
The Association Logic
To prevent identity confusion, we solve a bipartite matching problem to pair every detected Face (Fᵢ) with its corresponding Body (Bⱼ). This is minimized via a cost matrix based on IoU (Intersection over Union) and spatial containment logic.
Signal Purification (Detach & Trim)
- DetachObject: If a bystander's bounding box intersects with the target, the bystander's pixels are mathematically nullified (blacked out).
- Trim: We apply a trimming operation to remove artifacts and useless empty space, ensuring maximum pixel density for the subject.
03Step 2: Preparing the Tensors (Normalization)
The Second Challenge: Neural networks require normalized, high-frequency inputs to detect micro-features like wrinkles. Standard resizing destroys this data.
We perform aspect-ratio preserving alignment (Letterbox) to prevent geometric distortion of facial features.
Mathematical Normalization
Pixel values x ∈ [0, 255] are scaled to [0, 1] and standardized to the ImageNet distribution:
Fine-Grained Tokenization (8×8)
Standard ViTs use coarse 16×16 patches. We utilize 8×8 Patch Embeddings. This quadruples the token density, preserving high-frequency details.
04Step 3: Fusing the Streams (The Model Core)
The Third Challenge: We now have two separate tensor streams (Face and Body). To reconstruct the "age signal," these streams must mathematically exchange information.
This is the engine of the system. We process the streams through a VOLO-D1 backbone (27.4M parameters) which uses Outlook Attention to efficiently encode fine-level tokens.
Cross-View Feature Fusion
The Face stream (Z_face) and Body stream (Z_body) are fused via a Feature Enhancer Module. Mathematically, the Body tokens act as context to re-weight the Face tokens.
05Step 4: The Final Output
The Final Challenge: The model must output a precise biological age, not a rough classification "bucket," while simultaneously determining gender.
The final fused features are projected into a unified 3-dimensional output vector handling two distinct mathematical tasks:
Age Regression (Scalar)
We treat age as a continuous value, optimized via Weighted MSE Loss to penalize outliers and handle class imbalance.
Gender Classification (Logits)
A binary classifier outputting confidence scores, optimized via Binary Cross-Entropy.