CEC358 UNDERWATER IMAGING SYSTEMS AND IMAGE PROCESSING
UNIT I FUNDAMENTAL COMPONENTS OF OPTICAL IMAGE PROCESSING SYSTEM
Focal length, Aperture, Shutter Speed, Spatial Resolution
Underwater lights and its importance, Halogen, LED, Colour Temperature, lumens, Beam angle
Image File format: JPEG,** PNG, TIFF, BMP, GIF.
UNIT II OPTICAL IMAGE PROCESSING
Sampling and Quantization, Geometric Transformation,
Interpolation, Image Reconstruction, Spatial Filtering, Histogram, Color transformations, Color Interpolation, Image segmentation, Pattern Recognitions
Challenges involved in underwater optical imaging
UNIT III FUNDAMENTALS OF UNDERWATER ACOUSTICS
Frequency and wavelength, Intensity and power, Logarithmic notation- Decibels, absolute references and levels, Source Level, Basics of propagation losses
Back scattering, Acoustic noise, Multiple paths, Doppler effect, Time characteristics of echoes, Active and passive sonar equations***
Underwater electro acoustic transducers- projectors and hydrophones, General Structure of SONAR systems.**
UNIT IV SONAR SIGNAL PROCESSING
Propagating waves, Wave number- frequency space, Finite continuous apertures,
Spatial sampling,Time and frequency domain beamforming, Array gain, Angular resolution, Range resolution,
Time Varying Gain (TVG), Signal intensity to image conversion
UNIT V DIFFERENT TYPES OF SONAR SYSTEMS
Passive and active sonars
Multi beam echo sounder, Sediment profiler, Side scan sonar, Synthetic aperture sonar