# Extrinsics Calibration keeps exceeding re-projection error stereo calibration fails

Source: https://forum.modalai.com/topic/3446/extrinsics-calibration-keeps-exceeding-re-projection-error-stereo-calibration-fails
Category: General Questions (https://forum.modalai.com/category/2/general-questions)
Posted: 2024-05-17 06:43:51 UTC by Guest
Replies: 1 · Views: 925

## Moderator (ModalAI staff) · 2024-05-17 15:37:09 UTC

@Gary-Holmgren there is mounting guidance here: https://docs.modalai.com/configure-extrinsics/#stereo-camera-mounting

## Reply by Moderator (ModalAI staff) · 2024-05-17 23:51:31 UTC

@Gary-Holmgren is your checkerboard mounted perfectly flat on a very stiff backing? If there is any inconsistencies in the checkerboard it can cause issues