J4 ›› 2015, Vol. 42 ›› Issue (1): 149-154.doi: 10.3969/j.issn.1001-2400.2015.01.024

• Original Articles • Previous Articles     Next Articles

Image enhancement based on estimating the upper and lower boundary

ZHANG Ming;BAI Songhao   

  1. (The Unit 95899 of the PLA, Beijing  100085, China)
  • Received:2013-10-17 Online:2015-02-20 Published:2015-04-14
  • Contact: ZHANG Ming E-mail:zmshy2128@163.com

Abstract:

A novel image enhancement algorithm based on estimating the upper and lower boundary is presented. The method employs the upper and lower boundary to adjust the image details adaptively and dehaze the image, respectively and control the extent of image enhancement flexibly by adjusting the distance between the upper and lower boundary. The weighted median filter is adopted to calculate the upper and lower boundary for preserving image edges. Simulation results show that the proposed algorithm can improve the visual quality of the image efficiently, preserve the details, compress the high dynamic range, reduce halo artifacts and make the image more realistic and natural.

Key words: image enhancement, estimating the upper and lower boundary, Retinex theory

CLC Number: 

  • TN919.81