Self-shading of in-water optical instruments

effectiveness of hedstroum files and rotary k3 instruments in removal of obturation materials during retreatment in curved canals

چکیده ندارد.

Self-shading correction for upwelling sea-surface radiance measurements made with buoyed instruments.

Upwelling radiance measurements made with instruments designed to float at the sea surface are shaded both by the instrument housing and by the buoy that holds the instrument. The amount of shading is wavelength dependent and is affected by the local marine and atmospheric conditions. Radiance measurements made with such instruments should be corrected for this self-shading error before being a...

Vision and Optical Instruments

26.1. Physics of the Eye • Explain the image formation by the eye. • Explain why peripheral images lack detail and color. • Define refractive indices. • Analyze the accommodation of the eye for distant and near vision. 26.2. Vision Correction • Identify and discuss common vision defects. • Explain nearsightedness and farsightedness corrections. • Explain laser vision correction. 26.3. Color and...

3d Instrument Self-shading Effects on In–water Multi-directional Radiance Measurements

Reconstructing Mass-Conserved Water Surfaces Using Shape from Shading and Optical Flow

This paper introduces a method for reconstructing water from real video footage. Using a single input video, the proposed method produces a more informative reconstruction from a wider range of possible scenes than the current state of the art. The key is the combination of vision algorithms and physics laws. Shape from shading is used to capture the change of the water’s surface, from which a ...