User's Manual

Table Of Contents

4-inch Visible Light Terminal

User Manual

Requirements for Visible Light Digital Face Image Data

The digital photo should be straight-edged, colored, half-portrayed with only one person, and the person

should be uncharted and in casuals. Persons who wear eyeglasses should remain to put on eyeglasses for

getting photo captured.

 Eye Distance

200 pixels or above are recommended with no less than 115 pixels of distance.

 Facial Expression

Neutral face or smile with eyes naturally open are recommended.

 Gesture and Angel

Horizontal rotating angle should not exceed ±10°, elevation should not exceed ±10°, and depression angle

should not exceed ±10°.

 Accessories

Masks or colored eyeglasses are not allowed. The frame of the eyeglasses should not cover eyes and

should not reflect light. For persons with thick eyeglasses frame, it is recommended to capture two images,

one with eyeglasses and the other one without the eyeglasses.

 Face

Complete face with clear contour, real scale, evenly distributed light, and no shadow.

 Image Format

Should be in BMP, JPG or JPEG.

 Data Requirement

Should comply with the following requirements:

1） White background with dark-colored apparel.

2） 24bit true color mode.

3） JPG format compressed image with not more than 20kb size.

4） Resolution should be between 358 x 441 to 1080 x 1920.

5） The vertical scale of head and body should be in a ratio of 2:1.

6） The photo should include the captured person’s shoulders at the same horizontal level.

7） The captured person’s eyes should be open and with clearly seen iris.

8） Neutral face or smile is preferred, showing teeth is not preferred.

9） The captured person should be clearly visible, natural in color, no harsh shadow or light spot or

reflection in face or background. The contrast and lightness level should be appropriate.