کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
392344 664764 2016 17 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Single image super-resolution by approximated Heaviside functions
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر هوش مصنوعی
پیش نمایش صفحه اول مقاله
Single image super-resolution by approximated Heaviside functions
چکیده انگلیسی


• Recover high resolution images with arbitrary upscaling factors from one single low resolution image.
• The unknown image can be viewed as consisting of smooth components and edges.
• Conduct continuous modeling by two sets of approximated Heaviside functions.
• One of the two sets represents smooth components and the other represents edges of images.
• The new method is fast and gets better numerical results than some competitive methods.

Image super-resolution involves the estimation of a high-resolution image from one or multiple low resolution images. It is widely used in medical imaging, satellite imaging, target recognition, etc. In this paper, we solve the problem of single image super-resolution from an image intensity function estimation perspective. We assume that the unknown image intensity function is defined on a continuous domain and belongs to a space with a redundant basis. The selection of the redundant basis is based on an observation: an image is composed of smooth and non-smooth components, and we use two classes of approximated Heaviside functions (AHFs) to represent them respectively. The coefficients of the redundant basis are computed iteratively from a given low-resolution image. In addition, we apply the proposed iterative scheme to image patches to reduce computation and storage size. Comparisons with some existing competitive methods show the effectiveness of the proposed method.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Information Sciences - Volume 348, 20 June 2016, Pages 107–123
نویسندگان
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