Magnetic Resonance Imaging (MRI) is a medical imaging technique used to make the diagnosis of a disease, Schizophrenia, and Multiple Sclerosis. To address the above issues, a blind IQA metric termed as the Nonreference Quality Index for Denoised Images (NQIDI), It is suggested in this paper for evaluating the standard of denoised MR pictures.Precise assessment of residue noise and edge sharpness within denoised MR images are required for the calculation of NQIDI. Hence, a principal components-based noise estimation model for quantifying the strength of noise in MR images and a quantitative IQA metric termed as Objective Measure of Sharpness of Edges (OMSE) that accounts for the perceptual sharpness of MR images are also introduced in this thesis. This paper an anonymous IQA measure, the No Reference Quality Index for Denoised Pictures (NQIDI), for evaluating the quality of denoised magnetic resonance pictures in order to overcome the aforementioned problems. Precise assessment of residual noise and edge sharpness in the denoised MR images are required for the calculation of NQIDI. Therefore, this thesis also introduces a quantitative IQA measure called the Objective Measure of Sharpness of Edges (OMSE), which accounts for the subjective sharpness of MR images, and a principle components-based noise estimation model for measuring the level of noise in MR images. The thesis includes three scientific contributions: a no-reference measure for evaluating the quality of denoised MR pictures, an objective metric for assessing the sharpness underlying edges in MR images, and a noise model for predicting the statistics and noise in MR images. The NQIDI is the algebraic product of two different quality factors, known as the Noise Suppression Factor (NSF) and the Edge-Preservation Factor (EPF), or Gradient Singular Value Decomposition (GSVD). The NSF is calculated using the standard deviation of latent noise in the picture and the standard dispersion of noise in the input image, whereas the EPF is calculated using the sharpness of edges in both the noisy output and denoised images.
Keywords : CNN, Machine Learning, X-ray image, Gradient Boost Algorithm, Python.
Author : R. Obhuakonda Reddy 1*, N. Sreevani 2 , B. Santhosh Kumar 3 ,, Y. Monoohar Reddy 4
Title : Noise Estimation Model for Quantifying the Strength of Noise in MR Images Using Objective Measure of Sharpness of Edges
Volume/Issue : 2024;1(1)
Page No : 15 - 19