Olympus Optical Company, Ltd.

Mitsuji Waki

Akihiro Kubota

Tadashi Nishio

Masaki Higurashi

A multi vision device including a projection device constituted by an array of a plurality of projection units each including a rear projection projector and a housing to support the rear projection projector; and a screen located away from the projection device and displays pictures projected from the projection device. Pictures projected from the adjoining projection units overlap on the screen and are configured to form one picture on the screen. In this manner, highly accurate projected pictures are obtained with no borders between the pictures adjacent to each other. The height and width of the pictures projected onto the screen are greater than the height and width on the side of the projection device that faces the screen.

Multivision device

In an image calibration device a calibration pattern is projected onto a screen from each projector under control of a personal computer or other calibration device , pictures are taken by a digital camera or other image pick-up device and the results are supplied to the calibration device . The calibration device uses the supplied picture data to calculate parameters in order to perform picture positioning, color adjustment, brightness adjustment and other adjustments and corrections, and based on the calculation results transforms the original picture data, generates and supplies signals indicating projection conditions to each of the projectors and performs image calibration control of the pictures projected by each projector Here at the time of taking pictures, by installing on the image pick-up device a shielding member formed into a tetragonal pyramid shape, the light-receiving part of the image pick-up device and the screen are completely shielded from ambient external light. By this means, the measurement precision of the image pick-up device is improved, and accurate and reliable image calibration is performed.

Growing community of inventors

Hachioji, Japan

Mitsuji Waki