add example calib notebook

README.md

@@ -56,7 +56,7 @@ intrinsics_matrix = np.array([
 Note that the intrinsics tend to not change much between episodes, but using the specific values corresponding to a particular episode tends to give the best results.
 
 ## Example Calibration Use Case
-Using the calibration information, one can project points in the robot's frame into pixel coordinates for the cameras. We will demonstrate how to map the robot gripper position to pixel coordinates for the external cameras with extrinsics in `cam2base_extrinsics.json`, see <TODO> for the full code.
+Using the calibration information, one can project points in the robot's frame into pixel coordinates for the cameras. We will demonstrate how to map the robot gripper position to pixel coordinates for the external cameras with extrinsics in `cam2base_extrinsics.json`, see `CalibrationExample.ipynb` for the full code.
 ```
 gripper_position_base = <Homogeneous gripper position in the base frame, as gotten from TFDS episode. Shape 4 x 1>
 cam_to_base_extrinsics_matrix = <extrinsics matrix for some camera>