Blurring effect is among the major visual degradations resulting from digital image enlargement. We introduce a set of sigmoidal functions to sharpen edges of enlarged images. We show that these functions have properties that are especially desirable for sharpening expanded edges. We then develop an adaptive contrast enhancement scheme based on edge sharpening using these functions. It is shown that this scheme results in images of better contrast and natural-looking sharp edges.


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    Title :

    Contrast enhancement for enlarged images based on edge sharpening


    Contributors:
    Qing Wang, (author) / Ward, R. (author) / Jiancheng Zou, (author)


    Publication date :

    2005-01-01


    Size :

    328402 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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