Yu-Chen Hu Chia-Chen Lin Kang-Liang Chi Block Prediction Vector Quantization for Grayscale Image Compression. 257-270 2007 78 Fundam. Inform. 2 http://iospress.metapress.com/openurl.asp?genre=article&issn=0169-2968&volume=78&issue=2&spage=257 db/journals/fuin/fuin78.html#HuLC07