مشخصات پژوهش

صفحه نخست /A Comparison between One-pass ...
عنوان A Comparison between One-pass and Three-pass JPEG-LS Image Compression
نوع پژوهش مقاله ارائه شده کنفرانسی
کلیدواژه‌ها JPEG-LS, Image compression, Contextbased, Three-pass, Adaptive Correction.
چکیده JPEG-LS standard is a context-based lossless image compression scheme, which uses 180° type modeling contexts in one pass scanning of an image. In this paper, for capturing high-order dependencies, statistical features and spatial configuration of an image, the three-pass JPEG-LS scheme with 360° type modeling contexts is proposed. For context determination, local gradients of intensity capturing the level of activity (smoothness, edginess) surrounding a pixel, is employed. For images with small dimensions, three-pass scheme and for large dimensions one-pass scheme result in higher compression ratios.
پژوهشگران کوهیار توکلیان (نفر سوم)، حسن طاهری (نفر دوم)، محمد فتحی (نفر اول)