FFT Example

Click on this thumbnail to display a 300K image that illustrates the use of frequency domain processing.

fft-icon


QuickTime Digitizing Example

Click on this thumbnail to display a 123K grayscale image captured directly into NIH Image from a TV camera plugged into the built-in video input port of a PowerMac7500.

steps-icon


How it was done

The second thumbnail image was created in NIH Image as follows:
  1. Increase contrast of original 402 x 286 image using Map window
  2. Use Apply Look-Up Table command
  3. Use Smooth command several times
  4. Reduce image size using Scale and Rotate with scale factor of 0.15
  5. Save reduced image in PICT format
  6. Open in GraphicConverter
  7. Save in GIF format

This Web page was created in NIH Image using the WWW Macros set available in the "user-macros" directory on zippy.nimh.nih.gov.