libPGF
    
            
                
                    libPGF is an implementation of the Progressive Graphics File (PGF)
                
            
             
            
             
            
        
            The Progressive Graphics File (PGF) is an efficient image file format, that is based on a fast, discrete wavelet transform with progressive coding features. PGF can be used for lossless and lossy compression. It's most suitable for natural images. PGF can be used as a very efficient and fast replacement of JPEG 2000.