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$ tex Angle_measure.tex && dvips -E Angle_measure.dvi; Outline fonts $ eps2eps -dNOCACHE Angle_measure.ps Angle_measure2.eps; Fix bounding box $ ps2epsi Angle_measure2.eps Angle_measure.eps; Convert to Sketch $ pstoedit -f sk Angle_measure.eps Angle_measure.sk; Convert to SVG $ skconvert Angle_measure.sk Angle_measure.svg; Fix Angle_measure.svg ...
In this simulation, adjusting the angle of view and distance of the camera while keeping the object in frame results in vastly differing images. At distances approaching infinity, the light rays are nearly parallel to each other, resulting in a "flattened" image. At low distances and high angles of view objects appear "foreshortened".
An autocollimator is an optical instrument for non-contact measurement of angles. They are typically used to align components and measure deflections in optical or mechanical systems. An autocollimator works by projecting an image onto a target mirror and measuring the deflection of the returned image against a scale, either visually or by ...
Distinctness of image (DOI) is a quantification of the deviation of the direction of light propagation from the regular direction by scattering during transmission or reflection. DOI is sensitive to even subtle scattering effects; the more light is being scattered out of the regular direction the more the initially sharp (well defined) image is ...
Practical for angle measurement (e.g., star maps). PanoTools uses this type of mapping. Maintains surface relations. Every pixel subtends an equal solid angle, or an equal area on the unit sphere. Looks like a mirror image on a ball, best special effect (unsophisticated distances), suitable for area comparison (clouds grade determination).
Digital image correlation and tracking is an optical method that employs tracking and image registration techniques for accurate 2D and 3D measurements of changes in images. This method is often used to measure full-field displacement and strains , and it is widely applied in many areas of science and engineering.
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