Still Image Compression Using Embedded Zero Tree Wavelet Encoding

Date Added: Jun 2009
Format: PDF

This paper proposes a Embedded Zerotree Wavelet Encoding (EZW) for image compression. Shapiro's Embedded Zerotree Wavelet encoder or EZW encoder for short. An EZW encoder is an encoder specially designed to use with wavelet transforms, which explains why it has the word wavelet in its name. The EZW encoder was originally designed to operate on images (2D-signals) but it can also be used on other dimensional signals. The EZW encoder is based on progressive encoding to compress an image into a bit stream with increasing accuracy. This means that when more bits are added to the stream, the decoded image will contain more detail, a property similar to JPEG encoded images.