相机参数:
         fc: [1.5178e+003 1.5249e+003]
         cc: [665.0545 472.1492]
         kc: [-0.2132 -0.0949 -0.0019 0.0013 0.7279]
    alpha_c: 0
         nx: 1280
         ny: 960
         KK: [3x4 double]
请问fc、cc、kc、alpha_c、nx、ny、KK和各自的数值都是什么意思?