This paper describes three methods to encode a region of interest (ROI) arbitrary shape in the JPEG standard. The ROI is part image encoded with higher quality than rest image. Two described are based on thresholding DCT coefficients. last method early termination entropy coding phase. All fully compatible existing decoders. Using ROI, it possible reduce bitrate only fraction original value. re...

JPEG 2000, a new international standard for still image compression, is discussed at length. A high-level introduction to the JPEG-2000 standard is given, followed by a detailed technical description of the JPEG2000 Part-1 codec. Keywords—JPEG 2000, still image compression/coding, standards.

Данная статья посвящена разработке и исследованию новой технологии сжатия на основе базисов Вейля – Гейзенберга (WH-технологии) для модификации стандарта JPEG улучшения его характеристик. С этой целью в работе анализируются основные этапы алгоритма JPEG, отмечаются ключевые особенности узкие места, ограничивающие дальнейшее повышение эффективности. Для преодоления этих ограничений предлагается ...

One of the most commonly used image format is Joint Photographic Experts Group (JPEG). The recognition of JPEG compression plays a significant part in digital forensics. In previous work, JPEG image can be compressed upto n times. However, in the compression techniques noise of the JPEG images and the error analysis in the JPEG images are not primarily concentrated. Hence, the recognition of th...

JPEG is probably the most widely used image compression standard in taking digital pictures, e.g., in most digital cameras. As a result, synthetic images by the trick operation of copy-paste are usually from and to JPEG images. Realizing that it might be impossible to find a method that is universal for all kinds of forgeries, we proposed a novel blind approach to detect copy-paste trail in doc...

JPEG-2000 is an emerging standard for still image compression. This paper provides a brief history of the JPEG-2000 standardization process, an overview of the standard, and some description of the capabilities provided by the standard. Part I of the JPEG-2000 standard specifies the minimum compliant decoder, while Part II describes optional, value-added extensions. Although the standard specif...