Will OpenCV 3.2+ FileStorage save the SimpleBlobDetector_create object in XML or YML?

Question

I am fairly new to OpenCV 3+ in Python. It looks to me that FileStorage under Python does not support, for example, a writeObj() method. Is it possible to save the SimpleBlobDetector_create to an XML or YAML file using OpenCV 3+ in Python? Another way to put it is this: using Python OpenCV, can I save XML/YAML data that is not a numpy array or a scalar (e.g. an object)?

Answer 1

I was making the problem much harder than necessary. The solution is simple:

# Setup SimpleBlobDetector parameters.
params = cv.SimpleBlobDetector_Params()

# Change desired parameters
params.minThreshold = 20
params.maxThreshold = 220

# Create the blob detector
detect = cv.SimpleBlobDetector_create(params)

# Write detector parameters to .yml file
fs_write = cv.FileStorage('blob_params_modified.yml',
                          cv.FILE_STORAGE_WRITE)
detect.write(fs_write)
fs_write.release()

You can read this file in as input instead of fiddling with the code every time you want to tweak a parameter.