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Wed, Aug 03, 2016 10:22 pm

GIMP Color Picker

I wanted to determine the hexadecimal or RGB values for the text in a Terminal window on a CentOS 7 Linux system. I didn't have gpick or another color picker utility available, but I did have the GNU Image Manipulation Program (GIMP) already installed on the system (you can install it on a CentOS system with yum install gimp), so I was able to take a screenshot of the window with GIMP and then use GIMP's color picker tool to determine the color of the text. To access the color picker tool, select Tools and then Color Picker from the GIMP menu.

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[/software/graphics/gimp] permanent link

Tue, Jul 26, 2016 9:57 pm

Taking a screenshot with GIMP

If you need to take an image of a window or an area on the screen on a Linux system, one of the options available is to use the GNU Image Manipulation Program, which is a free and open-source graphics editor that is also available for FreeBSD, Mac OS X, Microsoft Windows, and Solaris systems.

You can determine if the application is already installed using the which command.

$ which gimp

If it isn't installed, on systems that use the yum package management tool, such as CentOS, you can use the command yum install gimp from the root account to install it. On Linux distributions that use the Advanced Packaging Tool (APT) for package management, e.g., Ubuntu, you can use sudo apt-get install gimp.

To take a snapshot of a window or an area of the screen, take the following steps:

  1. Click on File.
  2. Click on Create.
  3. Select Screenshot.
  4. You can then select from the following:
    • Take a screenshot of a single window
    • Take a screenshot of the entire screen
    • Select a region to grab

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[/software/graphics/gimp] permanent link

Sat, Jul 19, 2014 1:11 pm

Steps for taking a screenshot in GIMP

Steps for taking a screenshot in GNU Image Manipulation Program (GIMP), which is a free graphics program available for Linux, Mac OS X, Solaris, and Microsoft Windows systems.
  1. Click on File.
  2. Select Create.
  3. Select Screenshot.
  4. When the GIMP screenshot window opens, you will have the option of selecting the area for the screenshot.
    • Take a screenshot of a single window
      [ ] Include window decoration
    • Take a screenshot of the entire screen
      [ ] Include mouse pointer
    • Select a region to grab
    Delay [ 0 ] seconds

    At the end of the delay, click in a window to snap it.

  5. When you have selected the option you want, click on the Snap button.

If you choose to take a screenshot of a single window, the cursor will change to something similar to a "+". Move the cursor over the appropriate window and that window will be pasted into a GIMP window when you click on the window. Note: make sure you don't have any windows overlapping the one you wish to capture, otherwise you may see a portion of an overlapping window in the screenshot.

If you don't want to capture the border around a window, scrollbars for the window, and any application menu at the top of the window, uncheck "Include window decoration.

If you choose "Take a screenshot of the entire screen", a snapshot will be taken of the entire screen including the GIMP window.

If you select a region to grab, the cursor will change as above. You can then click in one corner of the area of the screen you wish to include in the snapshot then drag the mouse to a diagonal corner while holding the mouse button down. When you release the button, the area selected will be captured.

Once you have the screen shot, you can create a GIF, JPG, PNG, etc. image file from the screenshot by clicking on File and selecting Export.

[/software/graphics/gimp] permanent link

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