color segmentation by pixels

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In this menu, you perform a segmentation by selecting individual pixels or groups of pixels off the image. When you select a pixel, all pixels that have the same color are selected along with it. The procedure works as follows:

  1. You display the image by clicking on the DISPLAY IMAGE menu field.
  2. You select a pick mode by clicking on the Pick mode menu field. You can pick one pixel at a time, or an entire set of pixels that lie in a vertical or horizontal line. You can also "unpick" pixels in corresponding ways.
  3. You select a color for the highlighting of pixels by entering the color in the Highlight color menu field.
  4. You click on the PICK menu field, and select pixels in the image. If your pick mode is Single pixels, you will select one pixel each time you click in the image. If your pick mode is Horizontal line or Vertical line, you must click twice to indicate the endpoints of the row or column of pixels you want to pick. You can work on the original image or in any blowup of it.
  5. To see the results, click on the DISPLAY HIGHLIGHTS menu field. You should get another display of your entire image, with the selected pixels highlighted in the selected color. If you only want to update blowups of the highlight image, click on the UPDATE BLOWUP IMAGES menu field.
  6. When you are satisfied with the segmentation, enter the name you want the bitmap file to have in the Bitmap file menu field. If you want to increase the resolution of the bitmap beyond that of the original image, enter the factor in the Magnification factor menu field. Set the Run-length encode? toggle according to whether you want the bitmap to be run-length encoded. Run-length encoded bitmaps usually take up less disk space. Finally, click on the CREATE BITMAP menu field to create the bitmap.

You can save a disk file that records your pixel selections, and recall it for use on other images. To do so, enter the name you want for the disk file in the Pick file menu field, and click on SAVE PICK FILE. To recall such a file, enter its name in the Pick file menu field, and click on RECALL PICK FILE.

You can clear all the currently picked pixels by clicking on CLEAR ALL PICKS.

You can expand your picks to include pixels whose color is close to that of picked colors by clicking on the FATTEN PICKS menu field. If this includes too many pixels, you can reverse the effect by clicking on the THIN PICKS menu field. It can be useful to experiment with fattening one or more times and then thinning the same number of times, because this has the effect of consolidating your segmentation and preventing you from missing pixels you probably intended to include.