Despeckling of Ultrasound Medical Images using DW and WP Transform Techniques
P. Kalavathi, S. Boopathiraja, Abinaya M · International Journal of Engineering and Technology · 2017
The existences of noise in the medical images impose misleading of diagnostic processes, because of the radiation problem while acquiring images.The medical images mostly affected by the speckle noise over other natural noises.There are number of noise removal techniques for speckle noise is proposed in both spatial and frequency domain.In this paper, we propose a frequency domain method using wavelet based noise removal technique to remove speckle noise that exists in the ultrasound images.Moreover, we have implemented two different methods in terms of decomposing the images.We used Discrete Wavelet Transform (DWT) and Wavelet Packet Transform (WPT) for decompose the images.For comparative analysis, the performance of these filtering techniques is quantitatively evaluated through Peak Signal to Noise Ratio (PSNR).