Add test for ximgproc/edgeboxes and fix up Python sample to work with returning scores

* Test for Edgeboxes implementation

* Fix and enhance edgeboxes_demo.py

* Make double literal a float literal

* Address review feedback

Build DoG Pyramid if useProvideKeypoints is false

The buildDoGPyramid operation need not be performed unconditionally. In cases where it is not needed, both memory and speed performance can be improved

- instead of validation checks

Fix memory corruption in RgbdPlane

* Fix memory corruption

* Use divUp instead of explicit rounding up integer division

* rgbd: add test

waldboost_detector train: avoid failed asserts while training by exiting early

* Avoids a failed assert which crashes training

* xobjdetect: improve waldboost messages

If 'lambda <= 0' or 'kappa <= 1.0', the stop condition for the solver is never met because beta would not be increasing.

83fc27cb

* Fix bug: Invalid Syntax at line 14(draw_motion_comp method)

* Fix bug: TypeError- integer argument expected, got float

* Fix bug: clean up the camera by adding .release()

Moved aruco dictionary globals into getPredefinedDictionary so constructed on first use, to allow lazy-loading of the opencv DLL

tesseract 4.x headers require C++11 (can't be used by OpenCV 3.4 without C++11)