| 摘要 |
An image is picked up by a camera comprising a fisheye lens having a relationship of h=nxfxtan( theta /m), wherein h is the height of an image of a subject at a certain point, f is the focal distance of the fisheye lens, theta is a field angle, m has a value of 1.6</=m</=3, and n has a value of m-0.4</=n</=m+0.4, and the image data of which is output from the camera, is converted into a plane image by an image data processing unit, and this converted image is then output to a monitor unit. Preferably, n and m both equal 2.
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