Japanese Patent Laid-Open No.
Hei 8-187526 (Japanese Patent Application No. Hei 10-32755)
Large Display Image Synthesis Processing Device
This invention produces large, panoramic, and high-resolution display
images by electronically connecting multiple camera shots of the same
subject taken from various angles. If these camera images were simply
conjoined, picture incongruity would result due to the differences in
the shooting conditions observable when the subject images are transposed
to their projected surfaces. This system eliminates such incongruity
by performing a geometric conversion of the images.
The example illustrated in the inserted figure below shows the synthesis
of such a large-display panoramic scenic picture. Respective camera
images are converted to a designated location on the virtual display
screen by means of a perspective conversion technique (usually it is
composed as if facing the front of the camera). This perspective conversion
involves a formula that utilizes pan angle, tilt angle, and the camera's
angle of view as parameters to convert every image pixel location to
a corresponding location on a virtual display screen. Any other pixels
needed on the virtual display screen are interpolated in reference to
the neighboring pixels in the aforementioned display locations. This
process eliminates the incongruous seams between camera images that
are taken from different locations.
Invention applications
This technology can be applied to high-quality images for large screen
displays. As one example, it is suitable for the large, high-quality
picture display image synthesis of panoramic pictures for various advertisements,
aerial surveys by monitoring satellites or aircraft, and remote sensing
images.
(Inventors: Yuko YAMANOUCHI, Nobuyuki YAGI, Hideo NOGUCHI)
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