2-D and 3-D Image Registration: for Medical, Remote Sensing, by A. Ardeshir Goshtasby

By A. Ardeshir Goshtasby

A definitive and finished overview of present literature and the main innovative applied sciences within the box of picture registration. rather well geared up and written. a must have for desktop experts.

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Additional resources for 2-D and 3-D Image Registration: for Medical, Remote Sensing, and Industrial Applications

Example text

Eigenvalues for windows centered and save their λ2 s in image L at edge positions. matrix. Suppose Find the at all image edges the corresponding 3: Find edge points that have locally maximum λ2 s by examining 3 × 3 neighborhoods in image L. Consider such edge points as the corners and save them in INPUT. 4: Sort INPUT according to λ2 from the largest to the smallest. 5: Starting from the top of INPUT, move corners from INPUT to OUTPUT one at a time. After moving a corner, increment POINTS 45 m by 1 and remove all corners in INPUT that are within distance 7σ of it.

For points that are not on the maximal path, their projections to the path (points on the path closest to them) are determined and distances of the projections to the same end of the path are divided by the length of the maximal path to obtain the nodes. Estimating the nodes in this manner ensures that the effect of a pixel becomes maximum at the curve point closest to it. Because an MST cannot contain loops, the procedure described above will replace a closed boundary by an open curve. In order to avoid that, whenever two branch end-points in an MST are adjacent, they are connected and a closed curve is fitted to it.

14c. The luminance component of the color image obtained by averaging the red, green, and blue components is shown in Fig. 14b, and edges of the luminance image obtained by locating locally maximum gradients in the gradient direction are shown in Fig. 14d. We see that color edges pick up sharp changes in chroma in addition to sharp changes in luminance. Color edges separate adjacent regions with significant color differences. 3 SUMMARY There is often a need to preprocess images before registration.

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