کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
483653 701604 2014 16 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A General scheme for dithering multidimensional signals, and a visual instance of encoding images with limited palettes
ترجمه فارسی عنوان
یک طرح کلی برای تقسیم سیگنال های چند بعدی و یک نمونه بصری از رمزگذاری تصاویر با پالت های محدود
کلمات کلیدی
پردازش سیگنال دیجیتال پردازش تصویر دیجیتال، متفرقه سیگنال های چند بعدی، سر و صدای کوانتومی، خوشه برداری بردار نرم
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر علوم کامپیوتر (عمومی)
چکیده انگلیسی

The core contribution of this paper is to introduce a general neat scheme based on soft vector clustering for the dithering of multidimensional signals that works in any space of arbitrary dimensionality, on arbitrary number and distribution of quantization centroids, and with a computable and controllable quantization noise. Dithering upon the digitization of one-dimensional and multi-dimensional signals disperses the quantization noise over the frequency domain which renders it less perceptible by signal processing systems including the human cognitive ones, so it has a very beneficial impact on vital domains such as communications, control, machine-learning, etc. Our extensive surveys have concluded that the published literature is missing such a neat dithering scheme. It is very desirable and insightful to visualize the behavior of our multidimensional dithering scheme; especially the dispersion of quantization noise over the frequency domain. In general, such visualization would be quite hard to achieve and perceive by the reader unless the target multidimensional signal itself is directly perceivable by humans. So, we chose to apply our multidimensional dithering scheme upon encoding true-color images – that are 3D signals – with palettes of limited sets of colors to show how it minimizes the visual distortions – esp. contouring effect – in the encoded images.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of King Saud University - Computer and Information Sciences - Volume 26, Issue 2, July 2014, Pages 202–217
نویسندگان
, , , ,