| 摘要 |
<p>Apparatus and method of obtaining an image of a user viewing content on a display, using the image to determine one or more facial parameters related to the users visual acuity, and determining whether the user is experiencing difficulty visually resolving the displayed content based on the facial parameters. A visual acuity score based on facial parameters may be compared to a threshold or historical data to determine viewer difficulty. Acceleration data from an accelerometer, orientation data from a gyroscope, and/or heart rate sensor data may be combined to determine visual acuity score. Facial parameters may include information about the visible area of the eyes, extent to which user has their eyes open, squinting or closed, whether the user is wearing glasses, and distance between user and screen, obtained based on apparent size of users face in the image. An eye scroll pattern may detected by eye-tracking video images and compared to expected pattern for displayed text. Text size and display brightness or contrast may be automatically controlled based on viewer difficulty. Data may be transmitted to a server, which may be accessible by a doctor. The method may be implemented in a smartphone, tablet, computer or television.</p> |
