OAK-D Absolute Depth Precision

Thanks Erik!

Hi, @FS93 . I'm working on a similar application like yours. After you implement Erik's tips what was the new error between real Z coordinate and that measured by OAK-D camera?

(AlexandreRibeiro for the stereo depth accuracy, see report here)

erik Thanks.

I have some clarification about OAK Camera
We can capture the 7-segment display and convert to number ? Using OAK Camera ?

erik What model of the OAK-D POE camera provides error less than 1.5% at 1m ground truth distance ?

@asif just replied here: https://discuss.luxonis.com/d/343-accuracy-of-spatial-detection-and-possible-improvements/8

erik Can you please answer Asfanas question here? I am also trying to get the dispartiy converted into depth and can not find in the link you provided the basis for assuming 7.5 as a effective focal lenghth..

Kindly help as soon as you are able to

Hi MamoonIsmailKhalid ,
Please see the documentation here.
Thanks, Erik

erik Thank you!!!

I wanted to just follow up on this, I am using the code given here:
(RGB, DEPT, CONFIDENCE aligned.py)
https://github.com/luxonis/depthai-python/blob/main/examples/StereoDepth/rgb_depth_aligned.py

Essentially I would need to take the disparity output and apply the formula:
depth=441.25∗7.5/disparity(pixel)
to calculate the depth??

Please answer this as I have been stuck on this for past 3 days and my head has been noodling up everday.

THANK YOU IN ADVANCE!!!!

Regards,
Mamoon

How would one extract the depth data directly? Any code examples you can refer me to??I am using the depth data to extract depth information and to overlay it on the output of 2D pose estimation (Google Mediapie) to recosntruct a 3D pose of the key points extracted from Google mediapipe

Thank you for your help and prompt responses! !

Hi MamoonIsmailKhalid,
You can extract depth data directly with depthai.node.StereoDepth.depth (reference to docs). One example which might help you, compares manual depth calculation (the formula you have been using above) to directly accessing depth trough ".depth" attribute.
Hope this helps.
Jaka

jakaskerl THANK YOU SO MUCH!! I will try that approach and post here if that solved my porblem. But I really appreciate your guidance already

afsana Can you please share your code for measuring the depth of the object.
thanks

erik can you please provide me the github link or code link to get the depth of the object

Check examples under Spatial detection.

Thanks,
Jaka

hi @erik can we pass grayscale frame to the blob yolov5 model for detection using the color camera? if yes, how?

Note: We want blob model to process the detections on the grayscale frame instead of the rgb frame using the color camera.

Unknown
Place ImageManip in-between the colorCamer and NN and change the frame type to GRAY8.

Thanks,
Jaka