A New FDCT-USFFT and FDCT-Wrap Algorithms for Image Contrast Enhancement

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Research areas:
Year:
2017
Type of Publication:
Article
Keywords:
FDCTs, FDCT-USFFT, FDCT-Wrap
Authors:
Abdullah M. Hammouche; Hazem M. El-Bakry
Journal:
IJAIM
Volume:
5
Number:
5
Pages:
31-37
Month:
March
ISSN:
2320-5121
Abstract:
The digital cameras provided a great service for users of different ages as it facilitated the process of capturing the images, and in spite of that user still needs to improve some of the images marred by the lack of clarity when taking an image because of the lack of proper lighting as it is in cloudy weather or bright or dark sites light , or take the image from a distance, leading to blurred image details. In this paper a comparison between two digital implementations of a new mathematical transform, namely, Fast Discrete Curvelet Transform via Unequally Spaced Fast Fourier Transform (FDCT-USFFT) and Fast Discrete Curvelet Transform via Wrapping (FDCT-Wrap) based to gray images contrast enhancement. This type of transforms returns a table of curvelet coefficients indexed by scale parameters, an orientation, and a spatial location. Results of comparison show that, for enhancing the contrast of gray images, the FDCT-Wrap is better than FDCT-USFFT
Full text: IJAIM_582_FINAL.pdf

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