Image Concatenation

Functions
cv::Mat	rcv::hcat (cv::Mat left, cv::Mat right, cv::Scalar fill=cv::Scalar(0))
	Concatenate the left and the right images horizontally.
cv::Mat	rcv::hcat (std::vector< cv::Mat > const &images, cv::Scalar fill=cv::Scalar(0))
	Concatenate a set of images horizontally.
cv::Mat	rcv::vcat (cv::Mat top, cv::Mat bottom, cv::Scalar fill=cv::Scalar(0))
	Concatenate the top and the bottom images vertically.
cv::Mat	rcv::vcat (std::vector< cv::Mat > const &images, cv::Scalar fill=cv::Scalar(0))
	Concatenate a set of images vertically.

---

Detailed Description

Paste two or more images together, generally for display purposes

Warning:

These methods are totally unoptimized. A real implementation would use lazy evaluation to make one copy of the pixels at the last moment. This is not implemented yet, so do not use in performance sensitive code.

---

Function Documentation

cv::Mat rcv::hcat	(	cv::Mat	left,
		cv::Mat	right,
		cv::Scalar	fill = cv::Scalar(0)
	)

Concatenate the left and the right images horizontally.

Use this version to concatenate two images

Parameters:

left	The left image
right	The right image
fill	A color to fill in the background of an image if it is smaller than the other

cv::Mat rcv::hcat	(	std::vector< cv::Mat > const &	images,
		cv::Scalar	fill = cv::Scalar(0)
	)

Concatenate a set of images horizontally.

Use this version to concatenate more than two images, e.g.

Example:

 cv::Mat display = rcv::hcat({first_image, second_image, third_image, fourth_image});

Parameters:

images	A list of images to be concatenated in left-to-right order
fill	A color to fill in the background of an image if it is smaller than the other

cv::Mat rcv::vcat	(	cv::Mat	top,
		cv::Mat	bottom,
		cv::Scalar	fill = cv::Scalar(0)
	)

Concatenate the top and the bottom images vertically.

Use this version to concatenate two images

Parameters:

top	The top image
bottom	The bottom image
fill	A color to fill in the background of an image if it is smaller than the other

cv::Mat rcv::vcat	(	std::vector< cv::Mat > const &	images,
		cv::Scalar	fill = cv::Scalar(0)
	)

Concatenate a set of images vertically.

Use this version to concatenate more than two images, e.g.

Example:

 cv::Mat display = rcv::vcat({first_image, second_image, third_image, fourth_image});

Parameters:

images	A list of images to be concatenated in bottom-to-top order
fill	A color to fill in the background of an image if it is smaller than the other