Plural Images Research Articles

Musical tone visualizing apparatus which displays an image of an animated objected in accordance with a musical performance

A musical tone visualizing apparatus includes at least an image memory for storing plural images relating to players and/or musical instruments of an orchestra, a display unit for displaying the images on a display screen thereof and a display control circuit for controlling the display unit so that displayed images can be varied in response to an inputted musical tone signal or inputted performance information outputted from an electronic musical instrument, for example. Hence, it is possible to move the players and musical instruments in response to performance of the electronic musical instrument, and it is also possible to selectively enlarge one display image of the player and musical instrument whose tone volume is the largest. Thus, the displayed images can be automatically varied in response to the performance of the electronic musical instrument.

Video analysis of motion

Motion analysis wherein a camera (14) converts an image of a body having illuminated markers placed thereon into plural image frames. A preprocessor (26) receives plural image lines and detects the occurrence of each marker in each line when a pixel amplitude exceeds a threshold, and an offset value representing the difference therebetween is added to a running total of values for the detected marker. Similarly, the offset is used to calculate moment for each pixel in each marker based on pixel line position. The calculated moment is added to a running total for the detected marker. Amplitude and moment sums for each pixel series for each marker in each line are passed to a processor which groups the amplitude and moment sums for each marker together. The grouped values are used to calculate a centroid value for each marker in real time, the result provided to a CPU.