منابع مشابه
Io: an intense brightening near 5 micrometers.
Spectrophotometric observations of the jovian satellite Io on 20 and 21 February 1978 (Universal Time) were made from 1.2 to 5.4 micrometers. Io's brightness at 4.7 to 5.4 micrometers was found to be three to five times greater at an orbital phase angle of 68 degrees than at orbital phase angles of 23 degrees (5.5 hours before the brightening) and 240 degrees (20 hours after the brightening). S...
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Portable digital cameras are being used widely by students and professionals in different fields as a practical way to digitize documents. Tools such as PhotoDoc enable the batch processing of such documents, performing automatic border removal and perspective correction. A PhotoDoc processed document and a scanned one look very similar to the human eye if both are in true color. However, if on...
متن کاملUsing Photographed Evacuation Plans to Support MEMS IMU Navigation
In this paper, we present various procedures to support a ZUPT-based MEMS IMU navigation application by available external building models and photographs of evacuation plans. In detail, these are approaches for horizontal alignment of the track using the external building shell, for height correction by stair and elevator detection, for the extraction of the initial position and direction usin...
متن کاملNanometer-resolution electron microscopy through micrometers-thick water layers.
Scanning transmission electron microscopy (STEM) was used to image gold nanoparticles on top of and below saline water layers of several micrometers thickness. The smallest gold nanoparticles studied had diameters of 1.4 nm and were visible for a liquid thickness of up to 3.3 microm. The imaging of gold nanoparticles below several micrometers of liquid was limited by broadening of the electron ...
متن کاملAutomatic perspective rectification of documents photographed with a camera
Using an incorrect lens, or camera shake can cause the perspective of photographs to be tilted or skewed. The perspective may be distorted, and is more evident in photographs containing continuous vertical lines or geometric shapes. This paper deals with perspective distortion together with skew distortion rectification of a document image file to make its content more easily comprehendible for...
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ژورنال
عنوان ژورنال: Annals of the New York Academy of Sciences
سال: 1898
ISSN: 0077-8923
DOI: 10.1111/j.1749-6632.1898.tb54977.x