image process of chessboard
I am calibrate a use C-arm X-ray machine. Right now, there are still distortion on image system (see edge), considering calibrate it as pinhole camera model. So I use chessboard. Because common opencv method to calibrate it(corner extraction...) to get Intrinsic Parameters and so on. The problem I want to figure it here: I know the "dark image" is inherent character of X-ray image. But pixel value differentiation between black and white grid is only about 10, and the edge area are too black. It will bad image quality, effect the image I got looks dark. Image attended below:extraction performance
In order to get good concern extraction performance, I want process it to look like original format. The original format attended below:
Any suggestions will be appreciated!!