Python Load OpenCV FileStorage

edit

Hi, The solution seems easy when found ;o) I hope doc will be extnded soon !

Here is how to load and use a matrix stored in an opencv generated xml file :

#load xml file
fileToLoad="myFile.xml"
myLoadedData = cv.Load(fileToLoad)

#check data properties
print myLoadedData # this print shows matrix size, datatype, cool !

#access a cell of the matrix
rowIdx=1
colIdx=10
print "Accessing matrix at col:"+str(colIdx)+", row:"+str(rowIdx)
print myLoadedData[rowIdx, colIdx]

That's done ! Hope it helps

Regards

Conventions in OpenCV 3.2 seem to be a little different to the other answers. I've used this with success:

import cv2
fs = cv2.FileStorage("calibration.xml", cv2.FILE_STORAGE_READ)
fn = fs.getNode("Camera_Matrix")
print (fn.mat())