A subclass of obscurationCommon for obscuring images in the PGM format. More...

#include <obscurationPGM.hpp>

Inheritance diagram for obscurationPGM:

Collaboration diagram for obscurationPGM:

Static Public Member Functions
static int	interpolate_grey (int p11, int p21, int p12, int p22, float dx, float dy)
	Interpolates a greyscale value between four neighboring pixels.

static void	interpolate_bilinear_PGM (ImageBase &image, int &valV, float i, float j)
	Interpolates a greyscale value at a specific point in an image using bilinear interpolation.

static void	bilinearRedim299_PGM (ImageBase &image, ImageBase &o_image)
	Resizes an image to 299x299 pixels using bilinear interpolation.

static void	newAverageBlurring_PGM (ImageBase &image, std::vector< ImageBase > &o_images)
	Applies average blurring to an image.

static void	areaScrambling_PGM (ImageBase &image, ImageBase &o_image, int start_i, int start_j, int area_h, int area_w)
	Scrambles the pixels in a specific area of an image.

static void	scrambling_PGM (ImageBase &image, ImageBase &o_image, int regionHeight, int regionWidth)
	Scrambles the pixels in an image.

static void	areaAverager_PGM (ImageBase &image, ImageBase &o_image, int start_i, int start_j, int area_h, int area_w)
	Applies averaging to a specific area of an image.

static void	averageByRegion_PGM (ImageBase &image, ImageBase &o_image, int regionHeight, int regionWidth)
	Applies averaging to an image.

static void	selectiveIndividualEncryption_PGM (ImageBase &image, ImageBase o_images[8])
	Encrypts an image using selective individual encryption.

static void	selectiveProgressiveEncryption_PGM (ImageBase &image, ImageBase o_images[8], bool MSBtoLSB)
	Encrypts an image using selective progressive encryption.

static void	selectiveGroupEncryption_PGM (ImageBase &image, ImageBase &o_image, int bitsGroup[8], int groupSize)
	Encrypts an image using selective group encryption.

Static Public Member Functions inherited from obscurationCommon
static void	genPRNS (unsigned int seq[8])
	Generate a random sequence of 8 bits.

static void	genBitsGroups (std::vector< std::vector< int > > &groups, int groupSize)
	Generate groups of bits.

static void	intVec2intArray (std::vector< int > &vec, int arr[8])
	Convert a vector of integers to an array of integers.

Detailed Description

A subclass of obscurationCommon for obscuring images in the PGM format.

This class provides functions to obscure images in the PGM format, inspired by Norman Hutte's methods for PPM images.

Authors: Katia Auxilien, Norman Hutte

Date: April 2024

Member Function Documentation

◆ areaAverager_PGM()

void obscurationPGM::areaAverager_PGM	(	ImageBase &	image,
		ImageBase &	o_image,
		int	start_i,
		int	start_j,
		int	area_h,
		int	area_w )

static

Applies averaging to a specific area of an image.

Inspired by Norman Hutte's method areaAverager.

Parameters

image	The image to average.
o_image	The averaged image.
start_i	The starting row of the area to average.
start_j	The starting column of the area to average.
area_h	The height of the area to average.
area_w	The width of the area to average.

Authors: Katia Auxilien, Norman Hutte

Date: 12 April 2024

◆ areaScrambling_PGM()

void obscurationPGM::areaScrambling_PGM	(	ImageBase &	image,
		ImageBase &	o_image,
		int	start_i,
		int	start_j,
		int	area_h,
		int	area_w )

static

Scrambles the pixels in a specific area of an image.

Inspired by Norman Hutte's method areaScrambling.

Parameters

image	The image to scramble.
o_image	The scrambled image.
start_i	The starting row of the area to scramble.
start_j	The starting column of the area to scramble.
area_h	The height of the area to scramble.
area_w	The width of the area to scramble.

Authors: Katia Auxilien, Norman Hutte

Date: 12 April 2024

◆ averageByRegion_PGM()

void obscurationPGM::averageByRegion_PGM	(	ImageBase &	image,
		ImageBase &	o_image,
		int	regionHeight,
		int	regionWidth )

static

Applies averaging to an image.

Inspired by Norman Hutte's method averageByRegion.

Parameters

image	The image to average.
o_image	The averaged image.
regionHeight	The height of the regions to average.
regionWidth	The width of the regions to average.

Authors: Katia Auxilien, Norman Hutte

Date: 12 April 2024

◆ bilinearRedim299_PGM()

void obscurationPGM::bilinearRedim299_PGM	(	ImageBase &	image,
		ImageBase &	o_image )

static

Resizes an image to 299x299 pixels using bilinear interpolation.

Inspired by Norman Hutte's method bilinearRedim299.

Parameters

image	The image to resize.
o_image	The resized image.

Authors: Katia Auxilien, Norman Hutte

Date: 12 April 2024

◆ interpolate_bilinear_PGM()

void obscurationPGM::interpolate_bilinear_PGM	(	ImageBase &	image,
		int &	valV,
		float	i,
		float	j )

static

Interpolates a greyscale value at a specific point in an image using bilinear interpolation.

Inspired by Norman Hutte's method interpolate_bilinear.

Parameters

image	The image to interpolate.
valV	The interpolated greyscale value.
i	The x-coordinate of the point to interpolate.
j	The y-coordinate of the point to interpolate.

Authors: Katia Auxilien, Norman Hutte

Date: 12 April 2024

◆ interpolate_grey()

int obscurationPGM::interpolate_grey	(	int	p11,
		int	p21,
		int	p12,
		int	p22,
		float	dx,
		float	dy )

static

Interpolates a greyscale value between four neighboring pixels.

Inspired by Norman Hutte's method interpolate_color.

Parameters

p11	The top-left pixel value.
p21	The top-right pixel value.
p12	The bottom-left pixel value.
p22	The bottom-right pixel value.
dx	The distance between the desired point and the top-left pixel along the x-axis.
dy	The distance between the desired point and the top-left pixel along the y-axis.

Returns: The interpolated greyscale value.

Authors: Katia Auxilien, Norman Hutte

Date: 12 April 2024

◆ newAverageBlurring_PGM()

void obscurationPGM::newAverageBlurring_PGM	(	ImageBase &	image,
		std::vector< ImageBase > &	o_images )

static

Applies average blurring to an image.

Inspired by Norman Hutte's method newAverageBlurring.

Parameters

image	The image to blur.
o_images	The blurred images.

Authors: Katia Auxilien, Norman Hutte

Date: 11 April 2024

◆ scrambling_PGM()

void obscurationPGM::scrambling_PGM	(	ImageBase &	image,
		ImageBase &	o_image,
		int	regionHeight,
		int	regionWidth )

static

Scrambles the pixels in an image.

Inspired by Norman Hutte's method scrambling.

Parameters

image	The image to scramble.
o_image	The scrambled image.
regionHeight	The height of the regions to scramble.
regionWidth	The width of the regions to scramble.

Authors: Katia Auxilien, Norman Hutte

Date: 12 April 2024

◆ selectiveGroupEncryption_PGM()

void obscurationPGM::selectiveGroupEncryption_PGM	(	ImageBase &	image,
		ImageBase &	o_image,
		int	bitsGroup[8],
		int	groupSize )

static

Encrypts an image using selective group encryption.

Inspired by Norman Hutte's method selectiveGroupEncryption.

Parameters

image	The image to encrypt.
o_image	The encrypted image.
bitsGroup	The group of bits to encrypt.
groupSize	The size of the group of bits to encrypt.

Authors: Katia Auxilien, Norman Hutte

Date: 15 April 2024

◆ selectiveIndividualEncryption_PGM()

void obscurationPGM::selectiveIndividualEncryption_PGM	(	ImageBase &	image,
		ImageBase	o_images[8] )

static

Encrypts an image using selective individual encryption.

Inspired by Norman Hutte's method selectiveIndividualEncryption.

Parameters

image	The image to encrypt.
o_images	The encrypted images.

Authors: Katia Auxilien, Norman Hutte

Date: 15 April 2024

◆ selectiveProgressiveEncryption_PGM()

void obscurationPGM::selectiveProgressiveEncryption_PGM	(	ImageBase &	image,
		ImageBase	o_images[8],
		bool	MSBtoLSB )

static

Encrypts an image using selective progressive encryption.

Inspired by Norman Hutte's method selectiveProgressiveEncryption.

Parameters

image	The image to encrypt.
o_images	The encrypted images.
MSBtoLSB	Whether to encrypt from MSB to LSB or vice versa.

Authors: Katia Auxilien, Norman Hutte

Date: 15 April 2024

Static Public Member Functions

Detailed Description

Member Function Documentation

◆ areaAverager_PGM()

◆ areaScrambling_PGM()

◆ averageByRegion_PGM()

◆ bilinearRedim299_PGM()

◆ interpolate_bilinear_PGM()

◆ interpolate_grey()

◆ newAverageBlurring_PGM()

◆ scrambling_PGM()

◆ selectiveGroupEncryption_PGM()

◆ selectiveIndividualEncryption_PGM()

◆ selectiveProgressiveEncryption_PGM()