Field of viewvs angleof view

Most people speak of field of view when in fact they mean angle of view. Field of view is the distance covered by a projection at a certain distance. So if an image exactly shows a 2 meter wide object at 1 meter distance, then the field of view is 2 meter (and the angle of view is 90°). Angle of view is also known as angle of coverage.

Girls Inc. inspires all girls to be strong, smart, and bold, providing more than 140,000 girls across the U.S. and Canada with life-changing experiences and solutions to the unique challenges girls face. Hands-on, research-based programs provide girls with the skills and knowledge to set goals, overcome obstacles, and improve academic performance. Informed by girls and their families, Girls Inc. also works with policymakers to advocate for legislation and initiatives that increase opportunities for girls.

field ofview中文

Please also note that some software may modify somewhat the above relationship between FoV and focal length. For example, Hugin takes into account ratio of input image (see beginning of function SrcPanoImage::calcFocalLength() for details).

fov是什么

v F o V = 2 ∗ a t a n ( t a n ( h F o V 2 ) ∗ h e i g h t w i d t h ) {\displaystyle vFoV=2*atan\left(tan\left({\frac {hFoV}{2}}\right)*{\frac {height}{width}}\right)}

Field of view is often abbreviated as FoV. Usually field of view refers to the horizontal field of view (hFoV) of an image. Some applications make use of the vertical field of view (vFoV) which can be calculated from the Aspect Ratio of the image:

F o V = 2 ∗ a t a n ( s i z e 2 ∗ F o c a l L e n g t h ) {\displaystyle FoV=2*atan\left({\frac {size}{2*FocalLength}}\right)}

fov和焦距的关系

Assuming a rectilinear lens, the field of view can be calculated like this ( s i z e {\displaystyle size} being either width or height for the respective FoV):

The angle of view of a photograph or camera is a measure of the proportion of a scene included in the image. Simply said: How many degrees of view are included in an image. A typical fixed lens camera might have an angle of view of 50°, a fisheye lens can have an angle of view greater than 180° and a full equirectangular or cylindrical panorama would have an angle of view of 360°.

A s p e c t R a t i o = t a n ( h F o V 2 ) t a n ( v F o V 2 ) {\displaystyle AspectRatio={\frac {tan({\frac {hFoV}{2}})}{tan({\frac {vFoV}{2}})}}}

fov参数

Field of view

Please note that this is an approximation. The exact values depend on the location of the entrance pupil. More information on that in Rik Littlefield's paper. See Fisheye Projection for formulas for Fisheyes.

From here on and on the rest of the wiki we will only speak of field of view (although we should speak of angle of view).

Edmund Optics® (EO), the premier provider of optical components, organized a career exploration workshop for Girls Inc. of the Greater Philadelphia and Southern NJ at its Barrington, NJ facilitiy.

h F o V = 2 ∗ a t a n ( t a n ( v F o V 2 ) ∗ w i d t h h e i g h t ) {\displaystyle hFoV=2*atan\left(tan\left({\frac {vFoV}{2}}\right)*{\frac {width}{height}}\right)}

“We believe in the importance of role models for these young women, to keep them interested in STEM fields,” stated Rebecca Emerich, Educational Outreach Manager, Edmund Optics. “Which is why we invited Girls Inc. to join us for an exploration workshop, that included a tour of Edmund Optics’ facilities, hands-on optical experimentation, and interaction with successful, female Edmund Optics employees who shared their personal journeys into the world of STEM and answered the questions of the ambitious young women of Girls Inc.” Edmund Optics is invested in growing the number of young girls pursuing careers in the STEM field. After the event, one of the young girls from Girls Inc. stated, “My favorite part was that I got to see that there are successful and ambitious women in a so-called man’s industry.”