Semi-Automatic Global Contrast Enhancement
نویسندگان
چکیده
منابع مشابه
Semi-Automatic Global Contrast Enhancement
Since local contrast enhancement is not sufficient for a detailed visibility of an image, global enhancement also cannot be neglected. Among the global contrast enhancement methods, the automatic enhancement method like Global Histogram Equalization is not always desirable to utilize it for some images that some portions are overexposure and some portions are underexposure and no user's ch...
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Using global contrast enhancement, low contrast image can be improved in its quality globally. The enhanced output image, with such type of enhancement, may not have the noise and ringing artifacts. However, it may have over-exposure on some parts of the image and under-exposure on some other parts of the image when too high contrast gain occurs. Besides these, the enhanced output image may lac...
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We present an automated algorithm for global contrast enhancement of images with multimodal histograms. To locate modes and valleys, histogram analysis is performed by kernel density estimation, a robust nonparametric statistical method. Histogram warping by monotonic splines pushes the modes apart, spreading them out more evenly across the dynamic range. This technique can assist in the contra...
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In this project, we have implemented Image Contrast Enhancement algorithm that automatically enhances the contrast in an input image. The algorithm uses the Gaussian mixture model to model the image gray-level distribution and the intersection points of the Gaussian components in the model are used to partition the dynamic range of the image into input gray-level intervals. The contrast equaliz...
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We discuss several lters for their ability to both smoothen and enhance contrasts for an automatic evaluation of images. It turns out that lters that work well for the human sensation will not help for automatic image evaluation. Therefore we introduce a new lter, combining methods of nearest-neighbor and contrast enhancement techniques. Introduction Filters may both be used to repair pixel fau...
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ژورنال
عنوان ژورنال: International Journal of Computer Applications
سال: 2012
ISSN: 0975-8887
DOI: 10.5120/8063-1440