IMAGE ENHANCEMENT USING HYBRID TRANSFORMATION TECHNIQUES

G.Nandini, P.PradeepRaju, R.Lavanya

Abstract: Digital image processing plays a significant role in various fields through imaging techniques like image enhancement, image segmentation and image restoration etc. Image enhancement is widely used technique in some specific applications like medical image analysis and analysis of satellite images. These applications need to preserve brightness details, improvement in contrast and to highlight specific areas to clear details from noisy images. Brightness preservation enhances the visual quality of an image in a better way. Histogram equalisation is the commonly used technique for image enhancement due to its simplicity. But it shows poor performance while calculating Peak Signal to Noise Ratio(PSNR). This paper proposes a new hybrid technique using Biorthogonal wavelets and Discrete Cosine Transform with Image fusion techniques. Theresults show that this technique provides low Mean Square Error(MSE) and better PSNR value.

Keywords: Peak Signal to Noise Ratio(PSNR), Mean Square Error(MSE), image enhancement, image segmentation and image restoration

DOI: https://doi.org/10.15623/ijret.2015.0424018