MartyG
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Re: What is the accuracy of the RealSense D435i?
It is not possible to achieve 100% accuracy, as the error factor (RMS Error) starts at around 0 at the camera lens and increases linearly over distance. It is expected that accuracy will be less than 1% of the distance of the observed object from the camera. For example, at 1 meter range this may convert to an expected accuracy of 2.5mm to 5mm. There are various factors, including environment and lighting, that can affect accuracy though. The correct method is to start the program without any objects on the chessboard and allow the cameras to calibrate, and then only place the object on the chessboard when the program asks you to. Are you using the program this way, please?10KViews0likes2CommentsRe: What is the accuracy of the RealSense D435i?
Hi @hien_vu Have you changed the size of the chessboard from the 6x9 size suggested in the documentation of the box_dimensioner_multicam example, please? https://github.com/IntelRealSense/librealsense/blob/master/wrappers/python/examples/box_dimensioner_multicam/readme.md#example-output My understanding is that if you have changed the size of the chessboard then you should update the parameters in the script. https://github.com/IntelRealSense/librealsense/issues/354010KViews0likes6CommentsRe: What is the accuracy of the RealSense D435i?
The depth accuracy of the 400 Series cameras is less than one percent of the distance from the object. So if the camera is 1 meter from the object, the expected accuracy is between 2.5 mm to 5 mm. There are numerous environmental factors that can have an impact on accuracy. Also, in regard to technical factors, the 'RMS error' in the depth readings will increase as the distance from the object increases. It only becomes really noticeable at around the 3 m point though, so you should not experience much accuracy drift if using a distance between 100 and 1000 mm. Pages 13 and 14 of Intel's excellent illustrated tuning guide provide information and charts about the camera's RMS error factor. https://realsense.intel.com/wp-content/uploads/sites/63/BKM-For-Tuning-D435-and-D415-Cameras-Webinar_Rev3.pdf ******* Please also note that the RealSense forum has moved location, so future questions should be posted at the new forum linked to below. Thanks! https://support.intelrealsense.com/hc/en-us/community/topics10KViews0likes8Comments