Combining Undersampled Dithered Images
نویسندگان
چکیده
منابع مشابه
Combining Undersampled Dithered Images
Undersampled images, such as those produced by the HST WFPC-2, misrepresent fine-scale structure intrinsic to the astronomical sources being imaged. Analyzing such images is difficult on scales close to their resolution limits and may produce erroneous results. A set of “dithered” images of an astronomical source generally contains more information about its structure than any single undersampl...
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We present a set of tasks developed to process dithered undersampled images. These procedures allow one to easily determine the offsets between images and then combine the images using Variable-Pixel Linear Reconstruction, otherwise know as “drizzle”. This algorithm, originally developed for the combination of the images in the Hubble Deep Field(Williams et al. 1996, Fruchter & Hook 1997), pres...
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Ordered dither is considered to be a simple and effective method among all halftoning techniques. In this paper, compaction of ordered dithered images using arithmetic coding is studied. A preprocessor referred to as pixel interleaving (i.e., grouping pixels with similar dithering thresholds) is employed in such a way that dithered images can be efficiently coded with the JBIG1 code and high co...
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ژورنال
عنوان ژورنال: Publications of the Astronomical Society of the Pacific
سال: 1999
ISSN: 0004-6280,1538-3873
DOI: 10.1086/316319