Can't parse tvecs from pose estimation using SolvePnP

Python
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2

this is an image of the marker set mask at roughly 300 mm from the center of the camera (measured with a ruler). I added labels to make sure the SimpleBlobDetector was correctly finding the markers.

image
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The output tvecfrom SolvePnPRansac is: [[265.90126038] [ 84.38081316] [185.9831118 ]]

So based on this it’s looking like the actual Z-distance is about 1.5 greater than the output of SolvePnPRansac.