We have developed a multi-projector display environment called the projector array system. Tiled images are projected onto a large screen from the multiple projectors, and these images are connected seamlessly by an image transforming mechanism. This mechanism is executed in real-time by a special hardware called the PA board that modifies geometrical errors caused from each projector. In this paper, we apply this environment to a live image display system. In order to capture wide view-angle and high resolution images, we use a multi-camera system that has the same alignment as the multi-projector system. When we configure the total system, a method for modifying geometrical errors caused by the camera system, and another method for modifying errors caused from a parameter mismatch between the camera and the projector are required. In this system, therefore, we implement these methods so that three errors caused from: (1) projection environment; (2) camera system; and (3) parameter's mismatch are modified altogether by the PA board at the same time. A prototype experiment enables a naturalistic image display.

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Abstract This paper describes a practical method that enables actual images to be converted so that they can be projected onto an immersive projection display (IPD) screen. IPD screens are particularly unique in that their angle of view is extremely wide; therefore, the images projected onto them need to be taken on a special format. In practice, however, it is generally very difficult to shoot images that completely satisfy the specifications of the targeting IPD environment due to cost, technical problems or other reasons. To overcome these problems, we developed a method to modify the images by abandoning geometrical consistency. We were able to utilize this method by assuming that the given image was shot according to a special projection model. Because this model differed from the actual projection model with which the image was taken, we termed it the pseudo‐projection model. Since our method uses simple geometry, and can easily be expressed by a parametric function, the degree of modification or the time sequence for modification can readily be adjusted according to the features of each type of content. Copyright © 2003 John Wiley & Sons, Ltd.