about the same speed, but significatly more readable

  * make test more reproducible

  * move array size to enum
  * move array size to member variable
  * loosen the eps of SOLVEPNP_P3P
  * loosen the eps in Calib3d_SolveP3P.accuracy

Use directly solvePnP when the number of input points is equal to the number of model points. Enable useExtrinsicGuess parameter. Return rvec and tvec estimated using all the inliers instead of the best rvec and tvec estimated during the Minimal Sample Sets step. Document the behavior of solvePnPRansac.

Remove unnecessary Non-ASCII characters from source code (#9075)

* Remove unnecessary Non-ASCII characters from source code

Remove unnecessary Non-ASCII characters and replace them with ASCII
characters

* Remove dashes in the @param statement

Remove dashes and place single space in the @param statement to keep
coding style

* misc: more fixes for non-ASCII symbols

* misc: fix non-ASCII symbol in CMake file

The old error message was not giving any hint which input array (image)
led to an ill conditioned matrix. This made it near impossible to
identify poor images in a larger set.

A better approach would be to implement a checker function which gives
each image a rating before the real calibration is performed. This could
also include some image properties like sharpness, etc.

because they are too long (takes minutes)

Enable p3p and ap3p in solvePnPRansac (#8585)

* add paper info

* allow p3p and ap3p being RANSAC kernel

* keep previous code

* apply catrees comment

* fix getMat

* add comment

* add solvep3p test

* test return value

* fix warnings

Improve solvePnP doc, add assert >= 4 in solvePnP, escape underscore character for Scalar_ documentation.

Add reference to SOLVEPNP_ITERATIVE in the doc.

Added default parameters for minDisparity, numDisparities and blockSize. This fixes a bug where SGBM::load would not compile.

New p3p algorithm (accepted by CVPR 2017) (#8301)

* add p3p source code

* indent 4

* update publication info

* fix filename

* interface done

* plug in done, test needed

* debugging

* for test

* a working version

* clean p3p code

* test

* test

* fix warning, blank line

* apply patch from @catree

* add reference info

* namespace, indent 4

* static solveQuartic

* put small functions to anonymous namespace

- Fix StereoBM ROI (Region of interest) selection for stereo
images used by block matching algorithm

Use identity matrix if homography finding failed. Current behavior zeros out all points.

Update circlesgrid.cpp

Addressed comments

Update circlesgrid.cpp

removed whitespace