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Full-Text Articles in Marine Biology
Refinement Of The Critical Angle Calculation For The Contrast Reversal Of Oil Slicks Under Sunglint, Yingcheng Lu, Shaojie Sun, Minwei Zhang, Brock Murch, Chuanmin Hu
Refinement Of The Critical Angle Calculation For The Contrast Reversal Of Oil Slicks Under Sunglint, Yingcheng Lu, Shaojie Sun, Minwei Zhang, Brock Murch, Chuanmin Hu
C-IMAGE Publications
It has long been observed that oil slicks under sunglint can reverse their optical contrast against nearby oil‐free seawater. Such a phenomenon has been described through both empirical statistical analysis of the sunglint strength and modeled theoretically using a critical angle concept. The critical angle, in this model, is the angle at which the image pixels show no or negligible contrast between oiled and nonoiled seawater. Pixels away from this critical angle show either positive or negative contrast from the oil‐free pixels. Although this concept has been fully demonstrated in the published literature, its calculation needs to be further refined …
Sun Glint Requirement For The Remote Detection Of Surface Oil Films, Shaojie Sun, Chuanmin Hu
Sun Glint Requirement For The Remote Detection Of Surface Oil Films, Shaojie Sun, Chuanmin Hu
C-IMAGE Publications
Natural oil slicks in the western Gulf of Mexico are used to determine the sun glint threshold required for optical remote sensing of oil films. The threshold is determined using the same‐day image pairs collected by Moderate Resolution Imaging Spectroradiometer (MODIS) Terra (MODIST), MODIS Aqua (MODISA), and Visible Infrared Imaging Radiometer Suite (VIIRS) (N = 2297 images) over the same oil slick locations where at least one of the sensors captures the oil slicks. For each sensor, statistics of sun glint strengths, represented by the normalized glint reflectance (L GN, sr−1), when oil slicks can and cannot be …