Optimized Gray-Scale Image Watermarking Algorithm Based on DWT-DCT-SVD and Chaotic Firefly Algorithm.
Huailin DongMingyuan HeMing QiuPublished in: CyberC (2015)
Keyphrases
- gray scale
- firefly algorithm
- discrete cosine transform
- singular value decomposition
- convergence speed
- gray scale images
- color images
- discrete wavelet transform
- binary images
- mathematical morphology
- filter design
- image compression
- gray level
- multiresolution
- dct coefficients
- jpeg compression
- morphological operations
- subband
- transform domain
- image processing
- high frequency
- wavelet transform
- low frequency
- spatial domain
- low pass
- filter bank
- metaheuristic
- multiscale
- particle swarm optimization algorithm
- compression ratio
- high resolution
- particle swarm optimization
- image quality