Things to Know Before Placing an Order

This specification document aims to provide a standard for capturing customer finger and palm photos to ensure image quality and data consistency for better texture production of fingers/palms.

1. Photo collection environment
1.1 Lighting requirements:
- The lighting should be uniform and without obvious shadows.
- The lighting conditions of each photo should be as consistent as possible.
1.2 Background requirements:
- The background should be white (white paper, white background board).
- The background of each finger should be consistent, and the background should cover the entire frame except the finger as much as possible.

2. Shooting equipment and parameters
2.1 Shooting requirements:
- Use a camera or smartphone with a high-resolution camera.
- Keep the camera stable and accurate.
2.2 Shooting parameters:
- Resolution: not less than 4k and not more than 8k (the length of the frame is not less than 4096 and not more than 8192), there is no requirement for aspect ratio, the frame can contain the entire finger.
- Photo format: JPEG or PNG format.
- Exposure: Keep it consistent every time you shoot (lock the exposure to prevent the phone from automatically adjusting the exposure value), there is no need to restore the true color, and the exposure of the same finger photo should be consistent.

3. Subject requirements
3.1 Finger photography (the sample images are all based on the index finger):
- The outside of the finger.
When photographing the outside of the finger, try to shoot at an angle perpendicular to the finger, and focus on the texture details on the front of the finger to ensure clear details. (Please contact customer service for specific details)