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Second Generation Hybrid Image-Coding Techniques, M. Reha Civanlar, Sarah A. Rajala, Wonrae M. Lee
Second Generation Hybrid Image-Coding Techniques, M. Reha Civanlar, Sarah A. Rajala, Wonrae M. Lee
Sarah A. Rajala
Recently, ways to obtain a new generation of image-coding techniques have been proposed. The incorpordtion of the human visual system (IIVS) models and tools of the image analysis, such as segmentation, are two defining features of these techniques. In this paper, an application of the new approach to the classical linear predictive coding (LPC) of images and an HVS based segmentation technique for the second genera-tion coders will be discussed. In the case of LPC, the error image is encoded using an image decomposition approach and binary image coding. This improves the compression ratio keeping the quality nearly the same. …
Implementation Of A Projection Onto Convex Sets Iteration Based Image Coder, M. Reha Civanlar, Sarah A. Rajala, Thomas K. Miller
Implementation Of A Projection Onto Convex Sets Iteration Based Image Coder, M. Reha Civanlar, Sarah A. Rajala, Thomas K. Miller
Sarah A. Rajala
Projection onto convex sets iteration based image coding, where efficiently encodable sets are used to describe an image, is a recent approach to image compression. The technique allows the use of a variety of sets to encode an image. The focus of this paper, however, will be on two particular sets: the set of images whose cosine transform is known for certain frequencies and the set of images which are nonzero over a specified region. These sets can be used to encode interframe difference pictures of video teleconferencing images. A drawback of this new type of codec is its computational …