WXP::ImageMath Class Reference

This class manipulates images. More...

#include "../include/ImageMath.h"

Static Public Member Functions
static int	clip (Image &image, GeomBox &box, Image &new_image)
static int	clip (Image &image, EarthRange &range, Image &new_image)
static int	clip (Image &image, EarthPoint &ept, int width, int height, Image &new_image)
static int	scale (Image &image, float scale, Image &new_image)
static int	remap (Image &image, Domain &domain, Image &new_image)
static int	toIndex (Image &image, int rdepth, Image &new_image)
static int	toIndex (Image &image, Image &new_image)
static int	toIndex (Image &image, ColorMap &cmap, Image &new_image)
static int	toGray (Image &image, Image &new_image)
static int	toTrueColor (Image &image, int rdepth, Image &new_image)
static int	toTrueColor (Image &image, Image &new_image)
static int	compressColor (Image &image)
static int	merge (Image &oimg, Image &img)
static int	blank (Image &img, EarthPoint &ept1, EarthPoint &ept2)
static int	blank (Image &img, float angle)
static int	maskLesser (Image &oimg, Image &img, Grid &grid)
static int	maskGreater (Image &oimg, Image &img, Grid &grid)

Detailed Description

This class manipulates images.

Author

Dan Vietor

Member Function Documentation

blank() [1/2]

int ImageMath::blank ( Image &  img, EarthPoint &  ept1, EarthPoint &  ept2  )

static

Blanks area of image outside of lat lon range

Parameters

img	Base image
ept1	Upper left corner
ept2	Lower right corner

References WXP::EarthPoint::lat, WXP::EarthPoint::lon, WXP::GridPoint::set(), WXP::Image::setPixel(), and WXP::Image::tran().

blank() [2/2]

int ImageMath::blank ( Image &  img, float  angle  )

static

Blanks area of image outside of angle from projection centerpoint

Parameters

img	Base image
angle	Angle from centerpoint

References WXP::Calc::earthAngle(), WXP::EarthPoint::lat, WXP::EarthPoint::lon, WXP::Const::MISS, WXP::GridPoint::set(), WXP::EarthPoint::set(), WXP::Image::setPixel(), and WXP::Image::tran().

clip()

int ImageMath::clip ( Image &  image, GeomBox &  box, Image &  new_image  )

static

Clips an image

Parameters

image	Input image to clip
box	Box to clip to

Return values

new_image

Output image

References WXP::Image::allocData(), WXP::DomainVal::clat, WXP::DomainVal::clon, WXP::Image::getPixel(), WXP::GeomBox::height, WXP::EarthPoint::lat, WXP::EarthPoint::lon, WXP::DomainVal::nx, WXP::DomainVal::ny, WXP::GridPoint::set(), WXP::Image::setPixel(), WXP::Image::tran(), WXP::GeomBox::width, WXP::GeomBox::x, and WXP::GeomBox::y.

Referenced by WXP::ImagePlot::drawImage().

compressColor()

int ImageMath::compressColor ( Image &  image )

static

Compresses the color table in an image

Parameters

image

The image to perform compression on

References WXP::RGB::blu, WXP::Image::getVal(), WXP::RGB::grn, WXP::RGB::red, and WXP::Image::setPixel().

maskGreater()

int ImageMath::maskGreater ( Image &  oimg, Image &  img, Grid &  grid  )

static

Masks the image if the values are greater than the values in the grid

Parameters

oimg	Output image
img	Image to change
grid	Grid to use as a mask

References WXP::Grid::getValue(), WXP::Const::MISS, WXP::GridPoint::set(), WXP::Image::setPixel(), and WXP::Image::tran().

maskLesser()

int ImageMath::maskLesser ( Image &  oimg, Image &  img, Grid &  grid  )

static

Masks the image if the values are less than the values in the grid

Parameters

oimg	Output image
img	Image to change
grid	Grid to use as a mask

References WXP::Grid::getValue(), WXP::Const::MISS, WXP::GridPoint::set(), WXP::Image::setPixel(), and WXP::Image::tran().

merge()

int ImageMath::merge ( Image &  bimg, Image &  img  )

static

Merges the two image

Parameters

bimg	Base image
img	Image to merge

References WXP::Domain::getDx(), WXP::Domain::getDy(), WXP::Image::getLimits(), WXP::Domain::getNx(), WXP::Domain::getNy(), WXP::Image::getPixel(), WXP::Image::setPixel(), WXP::Image::tran(), WXP::Point::x, WXP::Rect::xmin, WXP::Point::y, and WXP::Rect::ymax.

remap()

int ImageMath::remap ( Image &  image, Domain &  new_domain, Image &  new_image  )

static

Remaps an image to a new domain

Parameters

image	Input image to remap
new_domain	New domain to map image into

Return values

new_image

Output image

References WXP::Image::allocData(), WXP::DomainVal::dx, WXP::DomainVal::dy, WXP::Domain::get(), WXP::Image::getLimits(), WXP::Image::getPixel(), WXP::Domain::getProj(), WXP::Const::MISS, WXP::DomainVal::nx, WXP::DomainVal::ny, WXP::Image::setPixel(), WXP::Image::tran(), WXP::Point::x, WXP::Rect::xmin, WXP::Point::y, and WXP::Rect::ymax.

Referenced by WXP::ImagePlot::drawImage().

scale()

int ImageMath::scale ( Image &  image, float  scale, Image &  new_image  )

static

Scales an image

Parameters

image	Input image to remap
scale	Scale factor <1 = smaller image, >1 = larger image

Return values

new_image

Output image

References WXP::Image::allocData(), WXP::DomainVal::dx, WXP::DomainVal::dy, WXP::Image::getLimits(), WXP::Image::getPixel(), WXP::DomainVal::nx, WXP::DomainVal::ny, scale(), and WXP::Image::setPixel().

Referenced by scale().

toGray()

int ImageMath::toGray ( Image &  image, Image &  new_image  )

static

Converts an image from direct color to gray scale

Parameters

image

Input direct color image

Return values

new_image

Output image

References WXP::Image::allocColors(), WXP::Image::allocData(), WXP::ImageColor::b, WXP::RGB::blu, WXP::ImageColor::g, WXP::RGB::grn, WXP::Image::init(), WXP::ImageColor::r, WXP::RGB::red, and WXP::Image::setPixel().

toIndex() [1/3]

int ImageMath::toIndex ( Image &  image, ColorMap &  cmap, Image &  new_image  )

static

Converts an image from direct color to index color. Uses colormap in new image and maps colors in input image to nearest color in colormap.

Parameters

image	Input direct color image
cmap	Colormap to use in new image

Return values

new_image

Output image

References WXP::Image::allocColors(), WXP::Image::allocData(), WXP::ImageColor::b, WXP::RGB::blu, WXP::ImageColor::g, WXP::ColorMap::get(), WXP::ColorMap::getNum(), WXP::RGB::grn, WXP::Image::init(), WXP::ImageColor::r, WXP::RGB::red, and WXP::Image::setPixel().

toIndex() [2/3]

int ImageMath::toIndex ( Image &  image, Image &  new_image  )

static

Converts an image from direct color to index color (depth=8)

Parameters

image

Input direct color image

Return values

new_image

Output image

References toIndex().

toIndex() [3/3]

int ImageMath::toIndex ( Image &  image, int  rdepth, Image &  new_image  )

static

Converts an image from direct color to index color

Parameters

image	Input direct color image
rdepth	New depth

Return values

new_image

Output image

References WXP::Image::allocColors(), WXP::Image::allocData(), WXP::ImageColor::b, WXP::RGB::blu, WXP::ImageColor::g, WXP::RGB::grn, WXP::Image::init(), WXP::ImageColor::r, WXP::RGB::red, and WXP::Image::setPixel().

Referenced by toIndex(), WXP::GifFile::write(), WXP::LZWComp::write(), and WXP::PngFile::write().

toTrueColor() [1/2]

int ImageMath::toTrueColor ( Image &  image, Image &  new_image  )

static

Converts an image from index color to direct color (depth=24)

Parameters

image

Input index color image

Return values

new_image

Output image

References toTrueColor().

toTrueColor() [2/2]

int ImageMath::toTrueColor ( Image &  image, int  rdepth, Image &  new_image  )

static

Converts an image from index color to direct color

Parameters

image	Input index color image
rdepth	New depth

Return values

new_image

Output image

References WXP::Image::allocData(), WXP::ImageColor::b, WXP::ImageColor::g, WXP::Image::getPixel(), WXP::Image::getVal(), WXP::Image::init(), WXP::ImageColor::r, and WXP::Image::setPixel().

Referenced by toTrueColor().

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The documentation for this class was generated from the following files:

• ImageMath.h
• ImageMath.cc