| 摘要 |
An electronic vision aid (1) has an analysis unit (3) to which a picture of an information medium (6) on which information visibly stands out from the background is supplied, and which determines a brilliance distribution (7) of the picture and derives from the brilliance distribution (7) a brilliance threshold value (P2) that lies in a transition zone (10) between a zone (9) of the brilliance distribution (7) associated with the background and a zone (8) of the brilliance distribution (7) associated with the information. The vision aid also comprises an image processing unit (4) which generates from the picture a binary image having only two different, predetermined brilliance values, in that it assigns the pixels of the binary image to the first of the two brilliance values when the brilliance of the corresponding pixel of the picture is smaller than the brilliance threshold value (P2), and otherwise assigns the pixels of the picture to the second brilliance value, and a display unit (5) that displays the binary image and is designed as a HMD. |
