Image Class Reference

A subclass of PNG with more member functions for modifying the image. More...

#include <Image.h>

Inheritance diagram for Image:

Collaboration diagram for Image:

Public Member Functions
void	lighten ()
	Lighten an Image by increasing the luminance of every pixel by 0.1. More...
void	lighten (double amount)
	Lighten an Image by increasing the luminance of every pixel by amount. More...
void	darken ()
	Darken an Image by decreasing the luminance of every pixel by 0.1. More...
void	darken (double amount)
	Darkens an Image by decreasing the luminance of every pixel by amount. More...
void	saturate ()
	Saturates an Image by increasing the saturation of every pixel by 0.1. More...
void	saturate (double amount)
	Saturates an Image by increasing the saturation of every pixel by amount. More...
void	desaturate ()
	Desaturates an Image by decreasing the saturation of every pixel by 0.1. More...
void	desaturate (double amount)
	Desaturates an Image by decreasing the saturation of every pixel by amount. More...
void	grayscale ()
	Turns the image grayscale. More...
void	rotateColor (double degrees)
	Rotates the color wheel by degrees. More...
void	illinify ()
	Illinify the image. More...
void	scale (double factor)
	Scale the Image by a given factor. More...
void	scale (unsigned w, unsigned h)
	Scales the image to fit within the size (w x h). More...

Detailed Description

A subclass of PNG with more member functions for modifying the image.

Member Function Documentation

darken() [1/2]

void Image::darken

(

)

Darken an Image by decreasing the luminance of every pixel by 0.1.

This function ensures that the luminance remains in the range [0, 1].

darken() [2/2]

void Image::darken

(

double

amount

)

Darkens an Image by decreasing the luminance of every pixel by amount.

This function ensures that the luminance remains in the range [0, 1].

Parameters

amount

The desired decrease in luminance.

desaturate() [1/2]

void Image::desaturate

(

)

Desaturates an Image by decreasing the saturation of every pixel by 0.1.

This function ensures that the saturation remains in the range [0, 1].

desaturate() [2/2]

void Image::desaturate

(

double

amount

)

Desaturates an Image by decreasing the saturation of every pixel by amount.

This function ensures that the saturation remains in the range [0, 1].

Parameters

amount

The desired decrease in saturation.

grayscale()

void Image::grayscale

(

)

Turns the image grayscale by setting saturation of all pixels to 0.

illinify()

void Image::illinify

(

)

Trasnform an Image to Illini colors.

The hue of every pixel is set to the a hue value of either orange or blue, based on if the pixel's hue value is closer to orange than blue.

lighten() [1/2]

void Image::lighten

(

)

Lighten an Image by increasing the luminance of every pixel by 0.1.

This function ensures that the luminance remains in the range [0, 1].

lighten() [2/2]

void Image::lighten

(

double

amount

)

Lighten an Image by increasing the luminance of every pixel by amount.

This function ensures that the luminance remains in the range [0, 1].

Parameters

amount

The desired increase in luminance.

rotateColor()

void Image::rotateColor

(

double

degrees

)

Rotates the color wheel by degrees.

Rotating in a positive direction increases the degree of the hue. This function ensures that the hue remains in the range [0, 360].

Parameters

degrees

The desired amount of rotation.

saturate() [1/2]

void Image::saturate

(

)

Saturates an Image by increasing the saturation of every pixel by 0.1.

This function ensures that the saturation remains in the range [0, 1].

saturate() [2/2]

void Image::saturate

(

double

amount

)

Saturates an Image by increasing the saturation of every pixel by amount.

This function ensures that the saturation remains in the range [0, 1].

Parameters

amount

The desired increase in saturation.

scale() [1/2]

void Image::scale

(

double

factor

)

Scale the Image by a given factor.

For example:

• A factor of 1.0 does not change the image.
• A factor of 0.5 results in an image with half the width and half the height.
• A factor of 2 results in an image with twice the width and twice the height.

This function both resizes the Image and scales the contents.

Parameters

factor

Scale factor.

scale() [2/2]

void Image::scale	(	unsigned	w,
		unsigned	h
	)

Scales the image to fit within the size (w x h).

This function preserves the aspect ratio of the image, so the result will always be an image of width w or of height h (not necessarily both).

For example, if the Image is currently (10, 20) and we want to scale to (100, 100), then this should scale the Image to (50, 100). Note that scaling the image to (100, 200) does not fit within the (100,100) dimensions given and is therefore incorrect.

This function both resizes the Image and scales the contents.

Parameters

w	Desired width of the scaled Image
h	Desired height of the scaled Image

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

• Image.h
• Image.cpp