Image quality enhancement using optimized thresholding and two-level diffusion-based denoising filter

ABSTRACT

Image quality enhancement includes the improvement of visual clarity, reduction of noise, and preservation of integral details that produce more realistic and desirable results. However, several existing models in image denoising have problems as they destroy fine details, over smooth them, and suffer complexity in computation with various types of noises besides optimizing parameters. Therefore, to address these challenges, a Teaching Learning Aquila Optimization-based Thresholding and Two Level Diffusion based Denoising Filter (TLAO-TTLDBF) model for image enhancement is developed, in which the Optimized Two-Level Diffusion Denoising Filter is adaptive and effective in noise reduction while preserving the significant details of the image. At the noise level is set to 0.5, the developed model achieves impressive PSNR, SDME, and SSIM values of 53.26 dB, 53.5 dB, and 0.72 respectively for random noise in satellite images and values of 52.23 dB, 48.45 dB, and 0.75 for medical images and outperformed other conventional models.

KEYWORDS:

• Image quality enhancement
• optimized thresholding
• two-level diffusion-based denoising filter
• teaching learning Aquila optimization
• deep learning
• satellite images
• random noise
• high resolution image

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Notes on contributors

Sharanabasav Hosamani

Sharanabasav Hosamani is a PhD scholar at Sharnbasva University, Kalaburagi, Karnataka, and completed Engineering in Electronics and Communication department, M.Tech in Digital Electronics, and pursuing PhD in Image Processing, from Sharnbasva University. He has been currently working as an Assistant Professor at Sharnbasva University for 13 years.

Shashidhar Sonnad

Dr. Shashidhar Sonnad is currently working as a Professor and Chairman in the Department of Electronics & Communication Engineering, Faculty of Engineering & Technology (Co-Education), Sharnbasva University, Kalaburagi, Karnataka, India. He has 16 years of experience in teaching and 3 years of experience in research. He has completed his M.Tech. (Communication Systems) and Ph.D. (Geospatial Image Processing) from Visvesvaraya Technological University, Belagavi. He contributed 7-research papers in International Journals attended 8-National and International Conferences, and 7-papers presented in the conferences. He worked as a Reviewer for various International Journals and IEEE-sponsored International Conferences.