RGB-Depth Processing

Detailed Description

ICP point-to-plane odometry algorithm

Classes
class	cv::linemod::ColorGradient
	Modality that computes quantized gradient orientations from a color image. More...
class	cv::rgbd::DepthCleaner
class	cv::linemod::DepthNormal
	Modality that computes quantized surface normals from a dense depth map. More...
class	cv::linemod::Detector
	Object detector using the LINE template matching algorithm with any set of modalities. More...
class	cv::rgbd::FastICPOdometry
struct	cv::linemod::Feature
	Discriminant feature described by its location and label. More...
class	cv::rgbd::ICPOdometry
struct	cv::linemod::Match
	Represents a successful template match. More...
class	cv::linemod::Modality
	Interface for modalities that plug into the LINE template matching representation. More...
class	cv::rgbd::Odometry
struct	cv::rgbd::OdometryFrame
class	cv::linemod::QuantizedPyramid
	Represents a modality operating over an image pyramid. More...
struct	cv::rgbd::RgbdFrame
class	cv::rgbd::RgbdICPOdometry
class	cv::rgbd::RgbdNormals
class	cv::rgbd::RgbdOdometry
class	cv::rgbd::RgbdPlane
struct	cv::linemod::Template

Functions
	cv::linemod::QuantizedPyramid::Candidate::Candidate (int x, int y, int label, float score)
	cv::linemod::Feature::Feature (int x, int y, int label)
	cv::linemod::Match::Match (int x, int y, float similarity, const String &class_id, int template_id)
void	cv::linemod::colormap (const Mat &quantized, Mat &dst)
	Debug function to colormap a quantized image for viewing.
void	cv::rgbd::depthTo3d (InputArray depth, InputArray K, OutputArray points3d, InputArray mask=noArray())
void	cv::rgbd::depthTo3dSparse (InputArray depth, InputArray in_K, InputArray in_points, OutputArray points3d)
void	cv::linemod::drawFeatures (InputOutputArray img, const std::vector< Template > &templates, const Point2i &tl, int size=10)
	Debug function to draw linemod features.
Ptr< linemod::Detector >	cv::linemod::getDefaultLINE ()
	Factory function for detector using LINE algorithm with color gradients.
Ptr< linemod::Detector >	cv::linemod::getDefaultLINEMOD ()
	Factory function for detector using LINE-MOD algorithm with color gradients and depth normals.
bool	cv::rgbd::isValidDepth (const double &depth)
bool	cv::rgbd::isValidDepth (const float &depth)
bool	cv::rgbd::isValidDepth (const int &depth)
bool	cv::rgbd::isValidDepth (const short int &depth)
bool	cv::rgbd::isValidDepth (const unsigned int &depth)
bool	cv::rgbd::isValidDepth (const unsigned short int &depth)
void	cv::rgbd::registerDepth (InputArray unregisteredCameraMatrix, InputArray registeredCameraMatrix, InputArray registeredDistCoeffs, InputArray Rt, InputArray unregisteredDepth, const Size &outputImagePlaneSize, OutputArray registeredDepth, bool depthDilation=false)
void	cv::rgbd::rescaleDepth (InputArray in, int depth, OutputArray out, double depth_factor=1000.0)
void	cv::rgbd::warpFrame (const Mat &image, const Mat &depth, const Mat &mask, const Mat &Rt, const Mat &cameraMatrix, const Mat &distCoeff, OutputArray warpedImage, OutputArray warpedDepth=noArray(), OutputArray warpedMask=noArray())

Function Documentation

Candidate()

cv::linemod::QuantizedPyramid::Candidate::Candidate ( int  x, int  y, int  label, float  score  )

inline

#include <opencv2/rgbd/linemod.hpp>

Feature()

cv::linemod::Feature::Feature ( int  x, int  y, int  label  )

inline

#include <opencv2/rgbd/linemod.hpp>

Match()

cv::linemod::Match::Match ( int  x, int  y, float  similarity, const String &  class_id, int  template_id  )

inline

#include <opencv2/rgbd/linemod.hpp>

colormap()

void cv::linemod::colormap	(	const Mat &	quantized,
		Mat &	dst
	)

Python:
	cv.linemod.colormap(	quantized[, dst]	) ->	dst

#include <opencv2/rgbd/linemod.hpp>

Debug function to colormap a quantized image for viewing.

depthTo3d()

void cv::rgbd::depthTo3d	(	InputArray	depth,
		InputArray	K,
		OutputArray	points3d,
		InputArray	mask = noArray()
	)

Python:
	cv.rgbd.depthTo3d(	depth, K[, points3d[, mask]]	) ->	points3d

#include <opencv2/rgbd/depth.hpp>

Converts a depth image to an organized set of 3d points. The coordinate system is x pointing left, y down and z away from the camera

Parameters

depth	the depth image (if given as short int CV_U, it is assumed to be the depth in millimeters (as done with the Microsoft Kinect), otherwise, if given as CV_32F or CV_64F, it is assumed in meters)
K	The calibration matrix
points3d	the resulting 3d points. They are of depth the same as depth if it is CV_32F or CV_64F, and the depth of K if depth is of depth CV_U
mask	the mask of the points to consider (can be empty)

depthTo3dSparse()

void cv::rgbd::depthTo3dSparse	(	InputArray	depth,
		InputArray	in_K,
		InputArray	in_points,
		OutputArray	points3d
	)

Python:
	cv.rgbd.depthTo3dSparse(	depth, in_K, in_points[, points3d]	) ->	points3d

#include <opencv2/rgbd/depth.hpp>

Parameters

depth	the depth image
in_K
in_points	the list of xy coordinates
points3d	the resulting 3d points

drawFeatures()

void cv::linemod::drawFeatures	(	InputOutputArray	img,
		const std::vector< Template > &	templates,
		const Point2i &	tl,
		int	size = 10
	)

Python:
	cv.linemod.drawFeatures(	img, templates, tl[, size]	) ->	img

#include <opencv2/rgbd/linemod.hpp>

Debug function to draw linemod features.

Parameters

img
templates	see Detector::addTemplate
tl	template bbox top-left offset see Detector::addTemplate
size	marker size see cv::drawMarker

getDefaultLINE()

Ptr< linemod::Detector > cv::linemod::getDefaultLINE

(

)

Python:
	cv.linemod.getDefaultLINE(		) ->	retval

#include <opencv2/rgbd/linemod.hpp>

Factory function for detector using LINE algorithm with color gradients.

Default parameter settings suitable for VGA images.

getDefaultLINEMOD()

Ptr< linemod::Detector > cv::linemod::getDefaultLINEMOD

(

)

Python:
	cv.linemod.getDefaultLINEMOD(		) ->	retval

#include <opencv2/rgbd/linemod.hpp>

Factory function for detector using LINE-MOD algorithm with color gradients and depth normals.

Default parameter settings suitable for VGA images.

isValidDepth() [1/6]

bool cv::rgbd::isValidDepth ( const double &  depth )

inline

#include <opencv2/rgbd/depth.hpp>

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isValidDepth() [2/6]

bool cv::rgbd::isValidDepth ( const float &  depth )

inline

#include <opencv2/rgbd/depth.hpp>

Checks if the value is a valid depth. For CV_16U or CV_16S, the convention is to be invalid if it is a limit. For a float/double, we just check if it is a NaN

Parameters

depth

the depth to check for validity

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isValidDepth() [3/6]

bool cv::rgbd::isValidDepth ( const int &  depth )

inline

#include <opencv2/rgbd/depth.hpp>

isValidDepth() [4/6]

bool cv::rgbd::isValidDepth ( const short int &  depth )

inline

#include <opencv2/rgbd/depth.hpp>

isValidDepth() [5/6]

bool cv::rgbd::isValidDepth ( const unsigned int &  depth )

inline

#include <opencv2/rgbd/depth.hpp>

isValidDepth() [6/6]

bool cv::rgbd::isValidDepth ( const unsigned short int &  depth )

inline

#include <opencv2/rgbd/depth.hpp>

registerDepth()

void cv::rgbd::registerDepth	(	InputArray	unregisteredCameraMatrix,
		InputArray	registeredCameraMatrix,
		InputArray	registeredDistCoeffs,
		InputArray	Rt,
		InputArray	unregisteredDepth,
		const Size &	outputImagePlaneSize,
		OutputArray	registeredDepth,
		bool	depthDilation = false
	)

Python:
	cv.rgbd.registerDepth(	unregisteredCameraMatrix, registeredCameraMatrix, registeredDistCoeffs, Rt, unregisteredDepth, outputImagePlaneSize[, registeredDepth[, depthDilation]]	) ->	registeredDepth

#include <opencv2/rgbd/depth.hpp>

Registers depth data to an external camera Registration is performed by creating a depth cloud, transforming the cloud by the rigid body transformation between the cameras, and then projecting the transformed points into the RGB camera.

uv_rgb = K_rgb * [R | t] * z * inv(K_ir) * uv_ir

Currently does not check for negative depth values.

Parameters

unregisteredCameraMatrix	the camera matrix of the depth camera
registeredCameraMatrix	the camera matrix of the external camera
registeredDistCoeffs	the distortion coefficients of the external camera
Rt	the rigid body transform between the cameras. Transforms points from depth camera frame to external camera frame.
unregisteredDepth	the input depth data
outputImagePlaneSize	the image plane dimensions of the external camera (width, height)
registeredDepth	the result of transforming the depth into the external camera
depthDilation	whether or not the depth is dilated to avoid holes and occlusion errors (optional)

rescaleDepth()

void cv::rgbd::rescaleDepth	(	InputArray	in,
		int	depth,
		OutputArray	out,
		double	depth_factor = 1000.0
	)

Python:
	cv.rgbd.rescaleDepth(	in_, depth[, out[, depth_factor]]	) ->	out

#include <opencv2/rgbd/depth.hpp>

If the input image is of type CV_16UC1 (like the Kinect one), the image is converted to floats, divided by depth_factor to get a depth in meters, and the values 0 are converted to std::numeric_limits<float>::quiet_NaN() Otherwise, the image is simply converted to floats

Parameters

in	the depth image (if given as short int CV_U, it is assumed to be the depth in millimeters (as done with the Microsoft Kinect), it is assumed in meters)
depth	the desired output depth (floats or double)
out	The rescaled float depth image
depth_factor	(optional) factor by which depth is converted to distance (by default = 1000.0 for Kinect sensor)

warpFrame()

void cv::rgbd::warpFrame	(	const Mat &	image,
		const Mat &	depth,
		const Mat &	mask,
		const Mat &	Rt,
		const Mat &	cameraMatrix,
		const Mat &	distCoeff,
		OutputArray	warpedImage,
		OutputArray	warpedDepth = noArray(),
		OutputArray	warpedMask = noArray()
	)

Python:
	cv.rgbd.warpFrame(	image, depth, mask, Rt, cameraMatrix, distCoeff[, warpedImage[, warpedDepth[, warpedMask]]]	) ->	warpedImage, warpedDepth, warpedMask

#include <opencv2/rgbd/depth.hpp>

Warp the image: compute 3d points from the depth, transform them using given transformation, then project color point cloud to an image plane. This function can be used to visualize results of the Odometry algorithm.

Parameters

image	The image (of CV_8UC1 or CV_8UC3 type)
depth	The depth (of type used in depthTo3d fuction)
mask	The mask of used pixels (of CV_8UC1), it can be empty
Rt	The transformation that will be applied to the 3d points computed from the depth
cameraMatrix	Camera matrix
distCoeff	Distortion coefficients
warpedImage	The warped image.
warpedDepth	The warped depth.
warpedMask	The warped mask.