Practical Method to Screen Contaminated Holograms of Flocs Using Light Intensity

Submergible digital holographic camera can measure the in situ size and shape of suspended particles, such as complex flocs biological organisms, without disturbance. As number particles water column increases, overlapping concentric rings (interference patterns) contaminate images. Using light intensity (LI), this study proposes a practical method to assess degree contamination screen out contaminated The outcomes from image processing support that LI normalized on gray scale 0 (black) 255 (white) be reliable criterion for defining boundary. Results found increased, particle distribution shifted positively skewed normal distribution. When was lower than approximately 80, owing distortion properties, settling velocities derived holograms with mosaic patterns were underestimated compared those uncontaminated holograms. proposed contribute more accurate estimation transport behavior cohesive sediments shallow estuarine environments.