Calibrated AA cameras perform differently

[Ming Chen]

Hi Group and Prof. Scaramuzza,

     I am developing a surround view system using the ocamcalib toolbox. The four cameras I am using are processed by auto alignment to make them perform close to each other. 

    However, when I got the calib_result.txt file of one camera and apply it to the other cameras, the cameras seemed to perform differently. As in the following picture shows, the top left defisheyed image corresponds to the fisheye camera fixed on the left rearview mirror, the bottom left corresponds to the camera fixed on the right rearview mirror. Ideally, these two camera images are supposed to be symmetrical, but the top left one seems to tilt too much to the right. At the same time, in the top and bottom right images, which correspond to the rear and front cameras, the bottom edges of the calibrating clothes, which are supposed to be straight, seem to be a little curvy. 

    Is there a way to keep them perform the same?

    Thank you very much in advance!