| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an image display device capable of: specifying as well as visualizing a position of a sound source which generates ultrasonic wave; and restraining degradation of accuracy of specifying the position of the sound source. <P>SOLUTION: An image display device comprises: correction temperature setting means to set correction temperature of a propagation velocity of ultrasonic wave detected by a first microphone group M1 and M2 as well as a second microphone group M3 and M4; sound source position calculation means to calculate an angle of a sound source to a first direction based on an arrival time difference of the ultrasonic wave at the first microphone group and the correction temperature, the angle of the sound source to a second direction based on the arrival time difference of the ultrasonic wave at the second microphone group and the correction temperature, and a position of the sound source from the angles to the first and the second directions; correlation means to correlate the position of the sound source calculated by the sound source position calculation means with a display position in a captured image displayed in a display region corresponding to the position of the sound source; and display control means to display an identification image of the position of the sound source at the display position correlated with the position of the sound source by the correlation means. <P>COPYRIGHT: (C)2012,JPO&INPIT |
