Underwater cave refraction
نویسندگان
چکیده
منابع مشابه
Underwater Stereo Mapping with Refraction Correction
This work presents the a method for underwater stereo mapping and localization for detailed inspection tasks. The method generates dense, geometrically accurate reconstructions of underwater environments by compensating for the negative effects caused by image distortions due to refraction. A refractive model of the camera and enclosure is calculated offline using calibration images and produce...
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When adapting computer vision algorithms to underwater imaging, two major differences in image formation occur. While still traveling through the water, light rays are scattered and absorbed depending on their wavelength, creating the typical blue hue and low contrast in underwater images. When entering the underwater housing of the camera, light rays are refracted twice upon passing from water...
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INTRODUCTION The DLT (Direct Linear Transformation) algorithm, the most frequently used calibration algorithm, is based on the so-called collinearity condition; i.e. the object, image, and projection center form a straight line. This condition, however, does not hold in an underwater analysis setting due to the nonlinear image deformation caused by refraction at the water-air interface (Figure ...
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Blombos Cave is an important site on the Southern Cape of South Africa for supporting " modern behavior " of the Middle Stone Age people. Many contend that the MSA people were not fully modern in behavior because the artifact remains do not support the working of organic material, fishing, and other advanced behavior. They also project that these behaviors may not have originated in Africa. How...
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ژورنال
عنوان ژورنال: The Physics Teacher
سال: 2018
ISSN: 0031-921X
DOI: 10.1119/1.5080600