Results 231 to 240 of about 222,275 (261)
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Accuracy of three-dimensional measurement using a single image
Optical Engineering, 1997The accuracy of 3-D measurement using a single image of a four-point coplanar target of known size is studied. The factors that influence accuracy are analyzed and experimental techniques are used to establish their individual effect on accuracy. Experiments show that the four-point coplanar target has two solutions for real images and that mixing ...
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Ultrasound in Medicine & Biology, 2003
The purpose of this study was to document the accuracy of 3-D uterus volume and to compare it with 2-D measurements. Transvaginal ultrasound (US) examinations were performed in 48 consecutive patients before hysterectomy. The examinations were stored digitally on an internal disk drive for subsequent measurements in virtual organ computer-aided ...
Cemil, Yaman +2 more
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The purpose of this study was to document the accuracy of 3-D uterus volume and to compare it with 2-D measurements. Transvaginal ultrasound (US) examinations were performed in 48 consecutive patients before hysterectomy. The examinations were stored digitally on an internal disk drive for subsequent measurements in virtual organ computer-aided ...
Cemil, Yaman +2 more
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Proceedings 2007 IEEE International Conference on Robotics and Automation, 2007
Accuracy is essential to surface quality control when a range sensor is applied to measure the 3D shape of an automotive body part. A sensor's viewing pose, including location and orientation, is related to measurement accuracy. It is usually difficult to find an optimal solution by manual control of sensor viewpoints.
Quan Shi, Ning Xi 0001, Weihua Sheng
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Accuracy is essential to surface quality control when a range sensor is applied to measure the 3D shape of an automotive body part. A sensor's viewing pose, including location and orientation, is related to measurement accuracy. It is usually difficult to find an optimal solution by manual control of sensor viewpoints.
Quan Shi, Ning Xi 0001, Weihua Sheng
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Journal of the American Society of Echocardiography, 2006
The availability of automated online software may increase the feasibility of real-time 3-dimensional (3D) echocardiography (3DE) for left ventricular (LV) volume calculation in clinical practice. We sought to compare offline and online approaches with magnetic resonance imaging (MRI).Patients who presented to the clinical laboratory for evaluation of ...
Jenkins, Carly +3 more
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The availability of automated online software may increase the feasibility of real-time 3-dimensional (3D) echocardiography (3DE) for left ventricular (LV) volume calculation in clinical practice. We sought to compare offline and online approaches with magnetic resonance imaging (MRI).Patients who presented to the clinical laboratory for evaluation of ...
Jenkins, Carly +3 more
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High accuracy three-dimensional attitude angle measuring device
Optics and Precision Engineering, 2016A high accuracy measuring device and corresponding measuring method for three;dimensional attitude angles (yaw, pitch and roll) were designed based on an autocollimator and a coordinate rotary transfer matrix. The working principle and structural composition were introduced.
孙国燕 SUN Guo-yan +4 more
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The evaluation of the accuracy of the 3 dimensional digital model measurements
2014Amaç: Bu çalışmanın amacı, 3 boyutlu tarayıcı ile elde edilen dijital modellerdeki ölçümlerin doğruluğunu değerlendirmektir. Gereç ve yöntem: Üzerinde 16 diş bulunan üst çene akrilik ana modelinden 125 adet alçı model elde edildi. Akrilik ana model ve alçı modellerden 3 boyutlu model tarayıcısı kullanılarak toplam 126 adet dijital model elde edildi ...
DİNÇEL, Arş. Gör. Dt. Mehmet +4 more
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Accuracy of 3-dimensional Analysis of Ureteral Stone Measurement
Journal of the American College of Surgeons, 2023Shyam Patnaik +3 more
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