β Scribed by B. Prescott; G.F. McLean
No coin nor oath required. For personal study only.
tion correction from the larger task of complete camera A method for determining the radial distortion parameters calibration. In Section 3 we present the distortion correcof a camera is presented. The technique is based on the analysis tion technique and briefly describe the technical tools of distorted images of straight lines and does not require the needed for its implementation. In Section 4 we discuss determination of point correspondence between a scene and an these tools in detail, and give a qualitative example of the image of that scene. The method is described in detail, including technique and a short discussion of practical implementainformation on the line detection method and the optimization tion issues. Section 5 presents experimental verification procedure used to estimate the distortion parameters. Quantitaof the technique's effectiveness. In all, the experimental tive and qualitative experimental results using both synthetic results show that the technique is able to accurately assess and real image data show that the technique is effective. ο 1997 the distortion parameters of the cameras without the use
π SIMILAR VOLUMES
## Abstract We present, here, a simple method for measurement and correction of offβresonance related geometric distortion in echoβplanar imaging (EP1). This method uses high signalβtoβnoise ratio (SNR) EPIβbased field maps, rapidly acquired using a series of gradient recalled images collected acro
A new model-free method is presented that automatically corrects for phase shifts, frequency shifts, and additional lineshape distortions of one single resonance peak across a series of in vivo NMR spectra. All separate phase and frequency variations are quickly and directly derived from the common