Why is the unit of focal length in pixel when you multiply mm and pixel?

2 次查看（过去 30 天）
sinan saglam
sinan saglam 2023-3-26
回答： George Abrahams 2024-1-23
I calibrated my stereo camera with matlab and extracted the focal length.
Now if I look to the documentation in which unit the focal lenght is, it shows me the calculation f = F*s.
F is in mm and s is in pixel so the unit of f should be in mm*pixel but ist says it is in pixel.
Why?

请先登录，再回答此问题。

回答（2 个）

Image Analyst
Image Analyst 2023-3-26
Where is that documentation you're referring to? I don't know why you'd multiply those two things. What do they represent? But in general the units of a product are the product of the units, so if F is in mm and s is in pixels, then y-F*s will have units of (mm*pixels).
George Abrahams
George Abrahams 2024-1-23
Hi @sinan saglam. I'm assuming that you're referring to the cameraIntrinsics documentation. At the time of writing, it describes the FocalLength property as follows:
Please reread this carefully. and are actually in . Therefore, the units of and are .

类别

在 Help Center 和 File Exchange 中查找有关 MATLAB Support Package for USB Webcams 的更多信息

标签

产品

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by