JPEG 2000-like access using the JPM compound document file format

Compound document images are usually high resolution and high quality images that include color, graphics, and images in addition to text. The need for good compression is important for storage and transmission. Due to the large size, even compressed, it is often difficult to access document images quickly and efficiently for display on monitors. The nascent JPM file format enables the best compound document image compression in terms of rate-distortion. Although JPM allows the use of JPEG 2000, access into a JPM file is limited by the access features of the older coders used. JPEG 2000 is an image coding system that allows access to lower resolutions, progressive bit-rates, and regions of interest. This paper describes methods for using JPEG 2000 in conjunction with older binary coders in a JPM file. Using these techniques it is possible to get close to the best rate-distortion performance and have access into the file. 1 INTRODUCTION Documents often include text, graphics, and imagery. Magazines, newspapers, brochures, annual reports, have had these attributes for a long time. With the popularity of desktop publishing, color scanners, color printers, color copiers, and color digital cameras for the consumer and office markets, the ability to make use of color, graphics, and imagery in documents is now commonplace. These documents are often reused across media modalities such as print and on the World Wide Web. There is a need for different and interactive access into the document format. Traditional facsimile compression technologies (G3, G4, MMR, JBIG) are insufficient for color images. Baseline JPEG compression sacrifices quality and is not so efficient for sharp edges created by text. Furthermore, none of these allow access of lower resolution, progression from lossy to lossless, or access to regions-of-interest. This access is useful for delivering document images from databases or capture devices, to different target devices such as computer and PDA displays, and printers. Two new standard technologies are designed to address these problems: the nascent JPM file format (JPEG 2000 Mixed Raster Content) [1] and the JPEG 2000 coding system [2][8]. 1.1 JPM file format technology The JPM file format is the latest descendent of a number of innovative technologies. Mixed Raster Content was standardized as ITU-T Rec. T.44 [3]. This standard is used in the IETF facsimile standard [9] and Xerox's Digipaper product [10]. Another related technology that preceded JPM is DjVu [11] which uses wavelet technology for the continuous-tone …