Discrete wavelet transform on color picture interpolation of digital still camera

  • Authors:

  • Yu-Cheng Fan;Yi-Feng Chiang

  • Affiliations:

  • Department of Electronic Engineering and Graduate Institute of Computer and Communication Engineering, National Taipei University of Technology, Taipei, Taiwan;Department of Electronic Engineering and Graduate Institute of Computer and Communication Engineering, National Taipei University of Technology, Taipei, Taiwan

  • Venue:
  • VLSI Design - Special issue on Advanced VLSI Design Methodologies for Emerging Industrial Multimedia and Communication Applications
  • Year:
  • 2013

Quantified Score

Hi-index 0.00

Visualization

Abstract

Many people use digital still cameras to take photographs in contemporary society. Significant amounts of digital information have led to the emergence of a digital era. Because of the small size and low cost of the product hardware, most image sensors use a color filter array to obtain image information. However, employing a color filter array results in the loss of image information; thus, a color interpolation technique must be employed to retrieve the original picture. Numerous researchers have developed interpolation algorithms in response to various image problems. The method proposed in this study involves integrating discrete wavelet transform (DWT) into the interpolation algorithm. The method was developed based on edgeweight and partial gain characteristics and uses the basic wavelet function to enhance the edge performance and processes of the nearest or larger and smaller direction gradients. The experiment results were compared to those of other methods to verify that the proposed method can improve image quality.