The Five Properties of an Ideal Photo
Five properties determine whether a photo will produce an accurate and stable celebrity match. In order of importance: 1. Even lighting, both sides of the face should be well lit, with no deep shadows. 2. Front-facing pose, the face should be roughly forward-facing, within about 15 degrees of straight-on. 3. Rear camera at distance, taken with the main camera from at least 50–60 cm to avoid wide-angle distortion. 4. Adequate resolution, the face should be at least 200 pixels wide in the image. 5. Neutral to relaxed expression, avoid strong smiles or frowns that alter landmark positions.
Photos that meet all five criteria produce the most accurate and consistent matches. If your result is surprising, systematically reviewing which of these criteria the photo meets often reveals the source of any discrepancy.
What to Avoid
The most common photo problems that degrade matching quality: Backlighting (bright window or lamp behind you), this creates a near-silhouette. Close selfies, wide-angle front camera at close range distorts facial proportions. Strong shadows, directional light from one side creates false geometric asymmetries. Heavy filters or face-tuning apps, these alter facial proportions and landmark positions directly. Group photos, low-resolution crops from group shots rarely have sufficient face resolution.
Screenshots from video calls (Zoom, Teams, FaceTime) also frequently produce poor results due to compression artefacts and the slightly distorted geometry of screen-facing cameras. Use an original camera file wherever possible.
Quick Checklist
Before uploading: ✓ Even light on both sides of face. ✓ Taken with rear camera, not front camera. ✓ Phone at least 50cm from face. ✓ Face looking approximately straight-on. ✓ Original file, not a screenshot or heavily compressed share. ✓ Face takes up at least 30% of image height.
If you meet these criteria and still receive a surprising match, try a second photo from a different session. Consistent results across different good-quality photos indicate genuine geometric similarity to the matched celebrity.