Image Details
Caption: Fig. 4.
Examples illustrating the use of unsharp masks: (a) one‐dimensional ﹩r^{1/ 4}﹩ intensity profile with narrow Gaussian added at ﹩r=2.5﹩ (solid line) along with Gaussian‐smoothed version (dashed line); (b) one‐dimensional unsharp mask produced by dividing original profile by smoothed profile; (c) R‐band contours of double‐barred galaxy NGC 2950; (d) unsharp mask (﹩\sigma =5﹩) of the same image, showing secondary bar; (e) larger scale R‐band contours of the same galaxy; (f) unsharp mask (﹩\sigma =20﹩), showing primary bar.
© 2003. The American Astronomical Society. All rights reserved. Printed in U.S.A.