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Upsampling01:22

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Managing signal sampling rates is essential in digital signal processing to maintain signal integrity. A decimated signal, characterized by a reduced frequency range due to its lower sampling rate, can be upsampled by inserting zeros between each sample. This upsampling process expands the original spectrum and introduces repeated spectral replicas at intervals dictated by the new Nyquist frequency. To refine this zero-inserted sequence, it is passed through a lowpass filter with a cutoff...
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Enhancing low-light images using Sakaguchi type function and Gegenbauer polynomial.

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This study enhances low-light images using geometric function theory, improving detail and quality. The novel method outperforms existing techniques for better visibility in challenging conditions.

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Area of Science:

  • Computer Vision
  • Image Processing
  • Geometric Function Theory

Background:

  • Low-light image enhancement is vital for computer vision applications.
  • Current methods struggle to balance image quality and detail preservation.
  • Noise and artifacts are common challenges in low-light imaging.

Purpose of the Study:

  • To introduce a novel method for low-light image enhancement.
  • To leverage advanced mathematical techniques from geometric function theory.
  • To improve detail retention and overall image quality.

Main Methods:

  • Application of Sakaguchi-type class functions, subordinated with the Gegenbeur polynomial.
  • Derivation of coefficient estimations using these functions.
  • Utilization of derived estimations in convolution kernels for image enhancement.

Main Results:

  • Significant improvements in image quality and detail preservation demonstrated.
  • Quantitative validation using Peak Signal-to-Noise Ratio (PSNR) and Structural Similarity Index Measure (SSIM).
  • Visual comparisons confirmed superior performance over state-of-the-art methods on the LOw-Light dataset (LOL).

Conclusions:

  • The proposed method effectively enhances low-light images.
  • It offers superior detail retention and visibility compared to existing approaches.
  • Potential applications include surveillance and medical imaging.