نتایج جستجو برای: background correction

تعداد نتایج: 991067  

This study aimed to discover the insight of error correction by implementing two correction systems on three Iranian university students. The three students were invited to write four in-class essays throughout the semester, in which their verb errors and individual-selected errors were corrected using the Code Correction System and the Individual Correction System. At the end of the study, the...

2009
M. Uppman M. Markl B. S. Spottiswoode

Figure 5: In-vivo background phase correction. (a) Magnitude image, (b) the original phase image, with the dashed blue line defining the area and (c) the red contour of stationary tissue for polynomial surface subtraction, (d) is ground truth, (e) 5th order polynomial subtraction, and (f) k-space filtering with a 64×64 pixel Gaussian kernel. Figure 1: phantom with steady-state flow. Red lines s...

2003
Krzysztof M. Kryszczuk

In this paper we present a method of automatic color correction of face images and its application in a face detection algorithm. The color correction method is based on the phenomenon of color constancy observed in human visual perception. This technique is further applied in a face detection system, which draws upon the analogy to the parallel organization of visual neural pathways, the magno...

2013
Jianing Pang Behzad Sharif Reza Arsanjani Louise E Thomson John D Friedman Daniel S Berman Debiao Li

Background As has been shown recently, the use of undersampled 3D projection reconstruction (3DPR) and image-based motion correction with 100% acquisition efficiency [1,2] enables highly accelerated coronary MRA (CMRA) with high isotropic resolution. However, streaking artifact from undersampling significantly reduces the apparent signal-to-noise ratio (SNR). Moreover, affine motion correction ...

2014
Constantine Zakkaroff Aleksandra Radjenovic John D Biglands Sven Plein John P Greenwood Derek R Magee

Background Automated mage registration in cardiac myocardial perfusion is a necessity before quantitative perfusion can be widely accepted in clinical practice. Increasingly complex motion correction algorithms are being developed to deal with cardiac motion. However, the impact of these improvements has not been evaluated in terms of the final clinical diagnosis. Advanced motion correction met...

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