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Added color map similar to Matlab's new default color map 'parula'.

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This commit is contained in:
Christian Richardt 2015-05-13 17:34:14 +02:00
parent 4af2eb22ab
commit 6425ac3b13
3 changed files with 27 additions and 1 deletions
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modules/imgproc/doc/pics/colormaps/colorscale_parula.jpg Normal file
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3
modules/imgproc/include/opencv2/imgproc.hpp
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@ -3741,7 +3741,8 @@ enum ColormapTypes
COLORMAP_COOL = 8, //!< ![cool](pics/colormaps/colorscale_cool.jpg) COLORMAP_COOL = 8, //!< ![cool](pics/colormaps/colorscale_cool.jpg)
COLORMAP_HSV = 9, //!< ![HSV](pics/colormaps/colorscale_hsv.jpg) COLORMAP_HSV = 9, //!< ![HSV](pics/colormaps/colorscale_hsv.jpg)
COLORMAP_PINK = 10, //!< ![pink](pics/colormaps/colorscale_pink.jpg) COLORMAP_PINK = 10, //!< ![pink](pics/colormaps/colorscale_pink.jpg)
COLORMAP_HOT = 11 //!< ![hot](pics/colormaps/colorscale_hot.jpg) COLORMAP_HOT = 11, //!< ![hot](pics/colormaps/colorscale_hot.jpg)
COLORMAP_PARULA = 12 //!< ![hot](pics/colormaps/colorscale_parula.jpg)
}; };
/** @brief Applies a GNU Octave/MATLAB equivalent colormap on a given image. /** @brief Applies a GNU Octave/MATLAB equivalent colormap on a given image.

25
modules/imgproc/src/colormap.cpp
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@ -469,6 +469,30 @@ namespace colormap
} }
}; };
// Colormap similar to MATLAB's "parula".
class Parula : public ColorMap {
public:
Parula() : ColorMap() {
init(256);
}
Parula(int n) : ColorMap() {
init(n);
}
void init(int n) {
float r[] = { 0.2078, 0.0118, 0.0784, 0.0235, 0.2196, 0.5725, 0.8510, 0.9882, 0.9765 };
float g[] = { 0.1647, 0.3882, 0.5216, 0.6549, 0.7255, 0.7490, 0.7294, 0.8078, 0.9843 };
float b[] = { 0.5294, 0.8824, 0.8314, 0.7765, 0.6196, 0.4510, 0.3373, 0.1804, 0.0549 };
Mat X = linspace(0, 1, 9);
this->_lut = ColorMap::linear_colormap(X,
Mat(9, 1, CV_32FC1, r).clone(), // red
Mat(9, 1, CV_32FC1, g).clone(), // green
Mat(9, 1, CV_32FC1, b).clone(), // blue
n); // number of sample points
}
};
void ColorMap::operator()(InputArray _src, OutputArray _dst) const void ColorMap::operator()(InputArray _src, OutputArray _dst) const
{ {
if(_lut.total() != 256) if(_lut.total() != 256)
@ -513,6 +537,7 @@ namespace colormap
colormap == COLORMAP_HSV ? (colormap::ColorMap*)(new colormap::HSV) : colormap == COLORMAP_HSV ? (colormap::ColorMap*)(new colormap::HSV) :
colormap == COLORMAP_JET ? (colormap::ColorMap*)(new colormap::Jet) : colormap == COLORMAP_JET ? (colormap::ColorMap*)(new colormap::Jet) :
colormap == COLORMAP_OCEAN ? (colormap::ColorMap*)(new colormap::Ocean) : colormap == COLORMAP_OCEAN ? (colormap::ColorMap*)(new colormap::Ocean) :
colormap == COLORMAP_PARULA ? (colormap::ColorMap*)(new colormap::Parula) :
colormap == COLORMAP_PINK ? (colormap::ColorMap*)(new colormap::Pink) : colormap == COLORMAP_PINK ? (colormap::ColorMap*)(new colormap::Pink) :
colormap == COLORMAP_RAINBOW ? (colormap::ColorMap*)(new colormap::Rainbow) : colormap == COLORMAP_RAINBOW ? (colormap::ColorMap*)(new colormap::Rainbow) :
colormap == COLORMAP_SPRING ? (colormap::ColorMap*)(new colormap::Spring) : colormap == COLORMAP_SPRING ? (colormap::ColorMap*)(new colormap::Spring) :