Bhandari, Harsh2026-01-282026-01-282026-01-13163p.http://hdl.handle.net/10263/7643This thesis is under the supervision of Prof. Sarbani PalitThis thesis investigates computational models and methodologies for restoring images degraded by challenging environmental conditions such as haze and underwater environments. It further explores the analysis and estimation of particulate matter (PM) concentration from both day and night scenes under varying weather conditions, using degraded visual data as a primary input. Each environment introduces distinct forms of visual degradation, making image restoration a critical challenge that directly impacts applications including visibility enhancement, weather analysis, particulate concentration estimation, and object detection. By addressing these challenges, this thesis aims to develop adaptable, data-driven solutions that enhance image clarity and improve information extraction across diverse environmental scenarios, thereby enabling more accurate interpretation and utilization of visual data.enDehazing, Particulate Matter Concentration, Aquaformer, Dark-Airnet, multi weather detectionThesis