Algorithm of Camera Focal Length Base on Image

Fusion of foreground and background in the virtual studio needs parameters of pan,tilt and zoom.First,two parameters are collected by encoder,while the collection of focal paremeter nees complicated supporting mechanism installed in the lens,and still precise parameter can not be collected in the application.This paper discusses the image processing based on the use of the improved GA algorithm and the combination of LM algorithm to realize the camera self-calibration of the fundamental matrix and the Kruppa equations optimize operations to get the camera internal parameters,in which the camera focal length is a parameter.When the internal reference value is determined,the camera focal length can be a parameter for the virtual studio camera focal length to provide accurate data.