Combined de-noising and sharpening of color images in DCT domain

  title={Combined de-noising and sharpening of color images in DCT domain},
  author={Radu Ciprian Bilcu and Sakari Alenius and Markku Vehvilainen},
  journal={2009 16th International Conference on Digital Signal Processing},
In this paper we present a new DCT-based method for combined de-noising and sharpening of color images. Our solution combines alpha-rooting and thresholding the DCT coefficients to achieve both sharpening and noise reduction. In our approach, sharpening and de-noising are done in the YUV color space with Y, U and V components being processed differently. Moreover, the size of the sliding DCT transform is variable and adaptive to the local characteristics of the input image thus increasing the… CONTINUE READING

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Content-Based Image Enhancement in the Compressed Domain Based on Multi-Scale α -Rooting Algorithm

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