| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fundus photographing device, adjusting the quantity of light for the next photographing to achieve photographing with a proper quantity of photographing light in the case of continuously photographing the same eye to be examined. <P>SOLUTION: Binarization process is conducted using a suitable threshold from a luminance difference between an iris and a pupil in a front eye part image to thereby extract a pupil region (S11). A pupil diameter D is calculated from a separated pupil region (S12). An increment value of quantity of photographing light is calculated from a stored light quantity increment value conversion table (Table 3) based on the pupil diameter D (S13). When the increment value of quantity of photographing light is calculated, the value of quantity of light in the next photographing is calculated by adding the value to the value of quantity of light in the preceding photographing (S14). <P>COPYRIGHT: (C)2011,JPO&INPIT |
