The linear theory and the post process program LIP are developed to describe the stimulated scattering in laser-plasma-interaction. The two damping rates, especially the collision damping rate, are included in the program LIP. The effects of the laser intensity and electron temperature are investigated in an ignition scale plasma. The importance of the collision damping is revealed, and it is found that the growth rate of the stimulated scattering is effectively reduced by the collision damping when the plasma density is close to one-quarter of critical density. Whereas, the electron temperature is responsible for the increase of the growth rate on the specific density scale. The results may provide the reference for the ignition design in reducing the reflectivity.