imageobfuscation

README

image-obfuscation

image obfuscation by slightly changing the FFT amplitude

prerequisites

• fftw
• pngquant
• jpegoptim

just use brew install fftw pngquant jpegoptim on macOS to install them.

download

Download the pre-compiled released on macOS here.

Documentation

Index

• Variables
• type Image
  • func (m *Image) Destory()
  • func (m *Image) FFT(force bool)
  • func (m *Image) GetFFT(order, x, y int) (complex128, error)
  • func (m *Image) IFFT() *Image
  • func (m *Image) SetFFT(order, x, y int, v complex128) error
• type ImageType
  • func Obfuscate(inputFileName, outputFileName string) (ImageType, error)

Variables

var ErrAnimatedImageNotSupported = errors.New("animated image not supported")

ErrAnimatedImageNotSupported animated image not supported

var ErrFFTHasNotPerformed = errors.New("FFT of this image haven't performed")

ErrFFTHasNotPerformed returned when FFT get/set when FFT haven't performed

var ErrImageNotSupported = errors.New("image type not supported")

ErrImageNotSupported image not supportted

Types

type Image

type Image struct {
	sync.RWMutex
	image.Image
	// contains filtered or unexported fields
}

Image image class with FFT / DFT ability

func (*Image) Destory

func (m *Image) Destory()

Destory release memory handled by FFTW

func (*Image) FFT

func (m *Image) FFT(force bool)

FFT do FFT on image

func (*Image) GetFFT

func (m *Image) GetFFT(order, x, y int) (complex128, error)

GetFFT get a color order's [x,y] FFT value

func (*Image) IFFT

func (m *Image) IFFT() *Image

IFFT do inverse FFT

func (*Image) SetFFT

func (m *Image) SetFFT(order, x, y int, v complex128) error

SetFFT set a color order's [x,y] FFT value

type ImageType

type ImageType int

ImageType image type

const (
	// ImageTypePNG png
	ImageTypePNG ImageType = iota
	// ImageTypeJPG jpeg
	ImageTypeJPG
	// ImageTypeGIF gif
	ImageTypeGIF
	// ImageTypeNotSupported not supported
	ImageTypeNotSupported
)

func Obfuscate

func Obfuscate(inputFileName, outputFileName string) (ImageType, error)

Obfuscate makes image obfuscation on inputFileName to outputFileName