iPhone 4 摄像头规格 - 视野/垂直-水平角度
有人知道新 iPhone4 摄像头的视野值吗？我正在做一些 AR 应用程序，我想知道后置摄像头的水平和垂直角度。
谢谢！
Does someone know the field of view values for the new iPhone4 camera? I'm doing some AR app's, and I want to know the horizontal and vertical angle of the rear camera.
Thanks!
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如果传感器高 3.39 毫米（参考横向模式），则其一半为 1.695 毫米。 iPhone 4 的焦距为 3.85 毫米。 atan(1.695/3.85) 从中心到顶部为 23.75 度，或从顶部到底部为 47.5 度。
对于较长的尺寸 4.52/2 = 2.26 mm，atan(2.26/3.85) = 30.41 中心到侧面，或从左到右 60.8 度（再次参考横向方向）。
所以水平 60.8 度，垂直 47.5 度。
很久以后添加：
较新的 iPhone 4S 后置摄像头的焦距列为 4.28 毫米，但传感器尺寸与较旧的 iPhone 4 相同。因此：
2*atan(2.26/4.28) = 55.7 度，2*atan(1.695/4.28) = 43.2 度
或者与 iPhone 4 相比，视野小大约 4 到 5 度。
稍后添加：
， 据报道，iPhone 5S 后置摄像头尺寸为 4.89 x 3.67 毫米，焦距为 4.12 毫米。因此：
2*atan((4.89/2)/4.12) = 61.4 度宽
2*atan((3.67/2)/4.12) = 48.0 度从上到下
...或者 FOV 比后置摄像头稍大一点iPhone 4。
If the sensor is 3.39 mm tall (referenced to landscape mode), then half that is 1.695 mm. Focal length for the iPhone 4 is listed as 3.85 mm. atan(1.695/3.85) is 23.75 degrees from center to top, or 47.5 degrees top to bottom.
For the longer dimension 4.52/2 = 2.26 mm, atan(2.26/3.85) = 30.41 center to side, or 60.8 degrees left to right (again referencing with respect to landscape orientation).
So 60.8 degrees horizontal by 47.5 degrees vertical.
ADDED much later:
The focal length for the newer iPhone 4S back camera is listed as 4.28 mm, but with the same sensor dimensions as the older iPhone 4. So:
2*atan(2.26/4.28) = 55.7 degrees, by 2*atan(1.695/4.28) = 43.2 degrees
or roughly a 4 to 5 degree smaller field-of-view compared with the iPhone 4.
ADDED much much later:
The sensor size for the iPhone 5S back camera is reported to be 4.89 x 3.67 mm, with a focal length of 4.12 mm. Thus:
2*atan((4.89/2)/4.12) = 61.4 degrees wide
2*atan((3.67/2)/4.12) = 48.0 degrees top to bottom
...or an FOV just a smidge larger than the back camera the iPhone 4.
我认为iOS7引入了一个新属性 videoFieldOfView for AVCaptureDeviceFormat 因此我们可以使用此属性来获取 FOV，即视野，例如：
其中 myCamera 是 AVCaptureDevice 的实例。 在这里您将了解焦距、角度的概述视野和视野。
I think iOS7 has introduced a new property videoFieldOfView for AVCaptureDeviceFormat so we can use this property to get the FOV, field of view like:
where myCamera is an instance of AVCaptureDevice. Here you will get an overview on focal length, angle of view and field of view.
之前的计算好像有点错误
OV8830-G04A 传感器尺寸为 4592x3450 um
那么正确的角度为：
2*atan(4.592/(2*4.28))*180/pi = 56.423
2*atan(3.450/(2*4.28))*180/pi = 43.903
It在敏感应用中变得非常重要。
Seems there is a little mistake in previous calculations
OV8830-G04A sensor has dimensions 4592x3450 um
Then correct angles are:
2*atan(4.592/(2*4.28))*180/pi = 56.423
2*atan(3.450/(2*4.28))*180/pi = 43.903
It becomes very crucial in sensitive applications.