5.1 Image Editing
5.2 Image Filtering 5.3 Image Contour | 10 Palette Editor; |
Image processing computation may take a long time to complete, depending on the size of the image and the speed of the computer.
The image menu allows you to modify the data range, change RGB balance in the image, and set the image brightness and contrast, and prepare a negative copy of the image.
Range Modification |
RGB Banlance
Brightness/Contrast Negative |
Selecting Range Modification opens a data range dialog box, labeled "New SDS Image Control" in the accompanying illustration. Slide the data range slidebars in the dialog box to specify new maximum and minimum values for the display. Values outside of the range will be set (pinned) to the nearer of the range bounds. Modifying the data range will usually change the color of the image and produce special image effects.
The following figure illustrates range modification of an SDS. The original data range is [202, 21412]; the modified range is [2092, 14692].
Select RGB Balance to open the RGB balance dialog box. The RGB, Red, Green, and Blue slidebars increase the corresponding color values by the selected amount (see below). Each time an adjustment is made, the specified value is added to each image pixel's color value. The maximum resulting value for a color component is 255 and the minimum value is 0; invalid results are truncated. Note that the RGB slidebar adjusts all three colors synchronously.
Changes to pixel RGB values are based on a minimum value of 0 and a maximum value of 255. The indicated percentage increase is a percentage of that maximum value. For instance, assume that a pixel has the value RGB (10, 10, 10) and that you move the Red slidebar to 4% while leaving the other slidebars at 0. This will add 4% of 255, or 10, to the pixel's red component, resulting in a value of RGB (20, 10, 10).
Selecting Brightness/Contrast opens the brightness/contrast dialog box. Select the appropriate channel (Red, Green, Blue, or All), and set the brightness and/or contrast adjustments. Upon completion, click on Preview to view the current changes without terminating the dialog. If you are ready to terminate the dialog, click on Cancel to discard any brightness or contrast changes you have made or Confirm to confirm them.
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utility.
Smooth
Sharpen Add Noise Find Edge Flip (Horizontal) Flip (Vertical) Emboss Polarize Rotate |
The Contour commands create a contour plot from an image. The contour lines are drawn in 3, 5, or 9 levels, which are equally spaced in the range of the data.
Level 3
Level 5 Level 9 |