نتایج جستجو برای: short range digital photogrammetry
تعداد نتایج: 1339763 فیلتر نتایج به سال:
Digital panoramic cameras have found growing interest in photogrammetry in the past few years. Originally primarily being used for purposes such as web-based animation or surveillance, panoramic cameras have meanwhile reached a performance, which makes them an interesting data acquisition tool for a number of applications in photogrammetry. New developments in sensor technology have enabled the...
Digital still cameras have been widely adopted for close range photogrammetry and machine vision applications. Due to the advantages of on board storage of digital images, portability and rapid data processing, digital still cameras have virtually replaced medium format film cameras for measurement tasks such as structural monitoring and industrial metrology. As for any photogrammetric applicat...
Of all tasks in photogrammetry the extraction of cartographic features is the most time consuming. Since the introduction of digital photogrammetry much attention therefore has been paid to the development of tools for a more efficient acquisition of cartographic features. Fully automatic acquisition of features like roads and buildings, however, appears to be very difficult and may even be imp...
Internet offers a new direction for software development and also for photogrammetry. The affordable commercial digital cameras are widely available and their geometrical resolution is good enough to perform photogrammetric measurements. Seeing this, a widely accessible, web based photogrammetry application could be a new development direction for photogrammetry. For photogrammetric calculation...
The measurement of millimetre and micro-scale features is performed by high-cost systems based on technologies with narrow working ranges to accurately control the position of the sensors. Photogrammetry would lower the costs of 3D inspection of micro-features and would be applicable to the inspection of non-removable micro parts of large objects too. Unfortunately, the behaviour of photogramme...
Unmanned Aerial Vehicle (UAV) platforms are nowadays a valuable source of data for inspection, surveillance, mapping and 3D modeling issues. As UAVs can be considered as a lowcost alternative to the classical manned aerial photogrammetry, new applications in the shortand close-range domain are introduced. Rotary or fixed wing UAVs, capable of performing the photogrammetric data acquisition with...
A Photogrammetric Method for the Assessment of Facial Morphology in Fetal Alcohol Syndrome Screening
Photogrammetry has been introduced as an alternative to direct measurements to obtain facial distances for a variety of anthropometric applications. We apply photogrammetry to assist in the screening of children for Fetal Alcohol Syndrome (FAS). We have developed a stereo-photogrammetric image acquisition platform to obtain digital photographs of 6 to 7 year-old children, and image processing a...
Chromatic aberration appears for almost all lenses for imaging based on white light. The effect degrades image quality for both b/w and colour cameras. This paper discusses the possibilities of modelling chromatic aberration with self-calibrating bundle adjustment for high-precision photogrammetric 3D point measurement using all three channels of a true colour image. After a survey on common ty...
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