Enumerations
enum	cv::ColormapTypes { cv::COLORMAP_AUTUMN = 0 , cv::COLORMAP_BONE = 1 , cv::COLORMAP_JET = 2 , cv::COLORMAP_WINTER = 3 , cv::COLORMAP_RAINBOW = 4 , cv::COLORMAP_OCEAN = 5 , cv::COLORMAP_SUMMER = 6 , cv::COLORMAP_SPRING = 7 , cv::COLORMAP_COOL = 8 , cv::COLORMAP_HSV = 9 , cv::COLORMAP_PINK = 10 , cv::COLORMAP_HOT = 11 , cv::COLORMAP_PARULA = 12 , cv::COLORMAP_MAGMA = 13 , cv::COLORMAP_INFERNO = 14 , cv::COLORMAP_PLASMA = 15 , cv::COLORMAP_VIRIDIS = 16 , cv::COLORMAP_CIVIDIS = 17 , cv::COLORMAP_TWILIGHT = 18 , cv::COLORMAP_TWILIGHT_SHIFTED = 19 , cv::COLORMAP_TURBO = 20 , cv::COLORMAP_DEEPGREEN = 21 }
	GNU Octave/MATLAB equivalent colormaps. More...

Functions
CV_EXPORTS_W void	cv::applyColorMap (InputArray src, OutputArray dst, int colormap)
	Applies a GNU Octave/MATLAB equivalent colormap on a given image. More...

CV_EXPORTS_W void	cv::applyColorMap (InputArray src, OutputArray dst, InputArray userColor)
	Applies a user colormap on a given image. More...

Detailed Description

The human perception isn't built for observing fine changes in grayscale images. Human eyes are more sensitive to observing changes between colors, so you often need to recolor your grayscale images to get a clue about them. OpenCV now comes with various colormaps to enhance the visualization in your computer vision application.

In OpenCV you only need applyColorMap to apply a colormap on a given image. The following sample code reads the path to an image from command line, applies a Jet colormap on it and shows the result:

See also: ColormapTypes

Enumeration Type Documentation

◆ ColormapTypes

enum cv::ColormapTypes

GNU Octave/MATLAB equivalent colormaps.

Enumerator
COLORMAP_AUTUMN
COLORMAP_BONE
COLORMAP_JET
COLORMAP_WINTER
COLORMAP_RAINBOW
COLORMAP_OCEAN
COLORMAP_SUMMER
COLORMAP_SPRING
COLORMAP_COOL
COLORMAP_HSV
COLORMAP_PINK
COLORMAP_HOT
COLORMAP_PARULA
COLORMAP_MAGMA
COLORMAP_INFERNO
COLORMAP_PLASMA
COLORMAP_VIRIDIS
COLORMAP_CIVIDIS
COLORMAP_TWILIGHT
COLORMAP_TWILIGHT_SHIFTED
COLORMAP_TURBO
COLORMAP_DEEPGREEN

Function Documentation

◆ applyColorMap() [1/2]

CV_EXPORTS_W void cv::applyColorMap	(	InputArray	src,
		OutputArray	dst,
		InputArray	userColor
	)

Applies a user colormap on a given image.

Parameters

src	The source image, grayscale or colored of type CV_8UC1 or CV_8UC3. If CV_8UC3, then the CV_8UC1 image is generated internally using cv::COLOR_BGR2GRAY.
dst	The result is the colormapped source image of the same number of channels as userColor. Note: Mat::create is called on dst.
userColor	The colormap to apply of type CV_8UC1 or CV_8UC3 and size 256

◆ applyColorMap() [2/2]

CV_EXPORTS_W void cv::applyColorMap	(	InputArray	src,
		OutputArray	dst,
		int	colormap
	)

Applies a GNU Octave/MATLAB equivalent colormap on a given image.