I now start to program to realize automatical imaging. While in selecting the best guiding stars, I encounter the following problem: when use CCDCamera.GuiderAutoSelectStar, it selected the brightest stars as guiding stars, but some times the guiding stars is too bright and it is not suitable for guiding. I want to select other stars in the same image very quickly based on ADU, intensity or FWHM, but I have no idea. Could you give some suggestions? Thank you in advance.