What accuracy for 3D measurements with cameras?

We estimate the internal and external parameters of the camera, and simultaneously the distortion´s parameters. Our aim is the selection of the best distortion model, using statistical test for the importance of distortion parameters. Also we examine the accuracy in camera parameter estimation and 3D reconstruction, in relation with the noise in the image. We answer the question “until which level of noise, is it possible to obtain a good camera parameter estimation, and from there a good reconstruction?”. Experiments are evaluated on simulated data and a rest is performed with real data