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10.2.4 GUI - Modifying Image and Graphics Colors

Modifying Image Colors

In this exercise, you will display an image over Europe, restore the default enhancement, and modify the image and graphics colors.

  1. Display a Meteosat image and map on the current frame, using data from band 8 of the MET/B dataset.

    In the Display/Image GUI, select: the MET/B dataset, band 8, and to display a map on the image.

    Select one image from the image list, load the image, and dismiss the Image Select window.

  2. Obviously, these colors are not the colors of a normal water vapor image. Even though the frames were erased, the NEXRAD enhancement is still assigned to that frame. So, you'll need to restore the correct colors by modifying the Image Colors.

    Select: Colors/Change Image Colors

    Click: the Reset tab

    The default option in the Reset tab is to reset the current frame only.

    Click: Reset

  3. Activate the GUI where you'll create your own enhancement.

    Click: Make

    The Make tab of the Image Colors GUI contains four options in which you can change or create image colors: 'Using Color Names,' 'Using Color Intensities,' 'Using ENH,' and 'Using EB.'

    Start out by using the predefined McIDAS colors.

    Click: Using Color Names

  4. Use the predefined color 'Firebrick' to begin at a grayscale of 100, and 'Gold' to end at a grayscale of 150.

    Slide: the Begin scrollbar to 100.

    Slide: the End scrollbar to 150.

    Select: Beginning Color/Firebrick

    Select: Ending Color/Gold

    Click: Apply Enhancement

    Look at the Image window. You should see that all brightness values from 100 to 150 are colored from Firebrick to Gold, depending on the specific value. All other brightness values will remain in their original grayscale form.

  5. Repeat Step 4 several times, changing the colors and input values each time.

  6. Once you have finished altering the image colors, dismiss the color selection GUI and save the enhancement as LEARNING.ET.

    Click: Dismiss

    Click: Save

    Type: LEARNING

    Click: Save

  7. Reset the original image enhancement and restore LEARNING.ET to the image once again.

    Click: Restore

    Select: Select Enhancement File/LEARNING.ET

    Click: Restore

  8. Restore the original image enhancement.

    Click: Reset

    Select: Frame Selection/Set for Current Loop

    Click: Reset

    Click: Dismiss

Modifying Graphics Colors

  1. Change the color of the map in frame 4.

    Select: Colors/Change Graphic Colors

    Click: Create a New Color

    Slide: the Red, Green, and Blue Intensity bars until you've created a color you like.

    Click: Apply Enhancement

    Click: Dismiss

    Look at the image window, and you will notice the changes to graphic color 1 took effect immediately.

  2. Save the new graphics table as LEARNING.GRX.

    Click: Save

    Type: LEARNING in the File Name field

    Click: Save

  3. Restore the default graphics colors.

    Click: Reset

    Select: Frame Selection/Current Frame Only

    Click: Reset

  4. Close the Graphics Colors window.

    Click: Dismiss

 


Previous: GUI - Looping Satellite Images Next: GUI - Plotting and Looping Grids Table of contents Index Glossary Images Frames ITC-NGIC McIDAS-X Training Workshop > User Interfaces > Graphical User Interface (GUI)