ColorChecker Chart is used for colour calibration, restoring the original image colours under illumination changes. Detecting them is relatively easy as they have a fixed shape. On the other hand, AprilTags are used for localization and augmented reality. OpenCV already has a detector for AprilTags based on classical techniques, but it is not robust to high degrees of rotation and also not to blurs. This project plans to implement a detector based on deep learning which will be robust to these.