camera intrinsics

[VeeranjaneyuluToka]

I have captured a couple of images of checker board pattern from my camera and feed to camera intrinsics repo and ran it. I got successfully camera intrinsics and distortion coefficents but they looks to me wrong, Is there anybody used camera intrinsics approach and got successfully intrinsics and how to verify whether they are correct? Thanks, Veeru.

[northeastsquare]

project world point to cam plane, verify in image