Image pick-up device, image display device and information recording medium comprising a fisheye lens
First Claim
Patent Images
1. An image pick-up device, comprising:
- a fisheye lens for picking up an image of all directions of a field of view around an optical axis of said fisheye lens at a field angle of at least 90°
in each direction with respect to the optical axis,the fisheye lens having a relationship of h=n·
f·
tan(θ
/m), h being a height of an image of a subject at a predetermined point obtained by the fisheye lens, f being a focal distance of the fisheye lens, θ
being a field angle, m having a value of 1.6≦
m<
3, and n having a value of m-0.4<
n≦
m+0.4.
2 Assignments
0 Petitions
Accused Products
Abstract
An image is picked up by a camera comprising a fisheye lens having a relationship of h=n·f·tan(θ/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, θ 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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Citations
14 Claims
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1. An image pick-up device, comprising:
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a fisheye lens for picking up an image of all directions of a field of view around an optical axis of said fisheye lens at a field angle of at least 90°
in each direction with respect to the optical axis,the fisheye lens having a relationship of h=n·
f·
tan(θ
/m), h being a height of an image of a subject at a predetermined point obtained by the fisheye lens, f being a focal distance of the fisheye lens, θ
being a field angle, m having a value of 1.6≦
m<
3, and n having a value of m-0.4<
n≦
m+0.4. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An information recording medium having recorded thereon a program including at least the steps of:
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converting into a plane image an image obtained by a fisheye lens for picking up an image of all directions of a field of view around an optical axis of said fisheye lens at a field angle of at least 90°
in each direction with respect to the optical axis, said fisheye lens having a relationship of h=n·
f·
tan(θ
/m), h being a height of an image of a subject at a predetermined point obtained by the fisheye lens, f being a focal distance of the fisheye lens, θ
being a field angle, m having a value of 1.6≦
m≦
3, and n having a value of m-0.4≦
n≦
m+0.4;displaying a predetermined portion of the converted plane image on a display unit; and changing continuously the predetermined portion with instruction means. - View Dependent Claims (12, 13, 14)
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Specification