to the simple object detection objects in the Python API.

from the middle of the pixel.

instead of point.

include a pixel multiple times in the output lists.

upper threshold.  This changes the function's API.

rectangle.

threshold_image().

object_detector constructor from python.  So now you can pack multiple
detectors into one object via the python API.

image_window in Python.

integer radius. Also made the circles centered on the center of the pixel at
their center when you zoom in.