https://blog.csdn.net/PINBODEXIAOZHU/article/details/47084633spa
https://blog.csdn.net/maopig/article/details/80773739.net
相机中 1英寸==16mm 表明斜对角线blog
根据像素比求出边长教程
假设 靶面是 1/2.8英寸get
斜边 1/2.8*16=aop
https://blog.csdn.net/dafenqie/article/details/78393412im