Drawing Distortion
Drawing Distortion - Related Videos
06:51
Measuring the Complete-arch Distortion of an Optical Dental Impression
0 Views •
Cited by 4 •
2019
Here, we present a protocol to measure the degree of distortion at each part of the compete-arch digital impression acquired from an intraoral scanner with 3D-printed metal phantom with standard geometries.
07:03
Medical-grade Sterilizable Target for Fluid-immersed Fetoscope Optical Distortion Calibration
0 Views •
Cited by 6 •
2017
This article describes the design and development of a sterilizable custom camera optical distortion calibration target for the peri-operative, fluid-immersed calibration of endoscopes during endoscopic interventions.
06:22
Motor Learning in Mirror Drawing
0 Views •
2023
Source: Laboratory of Jonathan Flombaum—Johns Hopkins University Colloquially, the terms learning and memory encompass a broad range of behaviors and mental systems, everything from learning to tie a shoe to mastering calculus (and a lot in between). Experimental psychologists have divided up learning mechanisms into groups that seem to have different properties, and that seem to rely on different brain systems. A major division is between declarative and non-declarative memory, roughly, the...
13:44
Detection of Architectural Distortion in Prior Mammograms via Analysis of Oriented Patterns
0 Views •
Cited by 14 •
2013
We demonstrate methods for the detection of architectural distortion in prior mammograms. Oriented structures are analyzed using Gabor filters and phase portraits to detect sites of radiating tissue patterns. Each site is characterized and classified using measures to represent spiculating patterns. The methods should assist in the detection of breast cancer.
11:57
Fabricating Metamaterials Using the Fiber Drawing Method
0 Views •
Cited by 23 •
2012
Metamaterials at terahertz frequencies offer unique opportunities, but are challenging to fabricate in bulk. We adapt the fabrication procedure for microstructured polymer optical fibers to inexpensively fabricate metamaterials potentially on an industrial scale. We produce polymethylmethacrylate fibers containing ~10 μm diameter indium wires separated by ~100 μm, which exhibit a terahertz plasmonic response.
FAQs
Nonuniform scaling changes different coordinate directions by different amounts, so a figure’s proportions no longer remain consistent. Lengths aligned with one direction may change more than lengths aligned with another, while angles and areas can also be altered. This matters when a drawing must support measurement, because visual size alone may no longer represent the original geometry accurately.
Shearing shifts points in a directional manner, changing angles and proportions while treating coordinate relationships differently from simple resizing. Projection instead represents spatial information from a different viewpoint, which can alter apparent distances and spatial relationships. Distinguishing these mechanisms helps determine whether a changed drawing reflects a deliberate geometric transformation or an approximate representation.
An analysis should compare distances, angles, areas, proportions, and spatial relationships between the original figure and its representation. These properties reveal different kinds of change: altered lengths indicate scale effects, changed angles suggest shearing or related transformations, and area differences show that the representation does not preserve size uniformly. The relevant property depends on the intended use.
To quantify the effect, compare corresponding geometric features in the original figure and the drawing, including distances, angles, areas, or proportions. The differences provide an estimate of representation error rather than relying only on visual judgment. This approach allows analysts to distinguish an exact transformation from an approximate drawing and to identify which spatial properties are least accurately preserved.
Begin by identifying the original coordinate system, the drawing’s coordinate system or viewpoint, and the corresponding points or features. Then compare relevant distances, angles, areas, and spatial relationships. Classify the observed changes according to scaling, shearing, projection, or coordinate warping. Finally, interpret the resulting differences in relation to whether the drawing is intended for measurement or illustration.
Drawing distortion matters wherever visual representations communicate geometric or spatial information. In geometry, it helps assess transformations and approximation errors. Cartography uses the issue when representing spatial relationships, while computer graphics and technical illustration may preserve or intentionally modify visual properties. Data visualization also depends on whether displayed proportions and spatial patterns support accurate interpretation.