Annotator is an image annotation tool for Linux. Here’s How to Install and Use It.

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Install and Use Annotator Linux

Annotator is a tool for annotating and editing images that can be found in the category of image annotation tools. This is how you utilize it while you’re running Linux.

Linux has a variety of tools for image modification, which you may use to alter images. GIMP, Pinta, and Krita are three of the most well-known options available. However, despite the fact that these tools provide a plethora of features and meet the requirements of the majority of users, a significant number of them have a steep learning curve, and the additional complexity of their features renders them unnecessary for basic image editing and annotation requirements.

An annotation tool, such as Annotator, which streamlines the image editing process and enables users to annotate pictures with only a few mouse clicks is what you really need for these kinds of applications.

Continue reading as we take you step by step through the process of installing and utilizing Annotator on Linux.

What Is Annotator?

You are able to annotate your photographs with text, images, shapes, and other visual features by using Annotator, a free and open-source image editing program for Linux. Annotator is available here. It features a straightforward user interface and is simple to operate.

In addition, you may use the Annotator program to edit photographs by cropping, scaling, and exporting them to a number of other image formats.

Annotator Features

Annotator has a comprehensive collection of useful functions by default. The following is a list of everything that can be done with it on your machine:

  • Add text, shapes, stickers, and other callouts to highlight something important in an image
  • Blur out portions with sensitive information
  • Add magnifiers to zoom into details
  • Change the colors, line thickness, and font properties
  • Export images in multiple formats: JPEG, PNG, TIFF, BMP, PDF, and SVG

How to Install Annotator on Linux

The Annotator program may be downloaded and installed on any major Linux distribution. This is a rundown of the methods that will help you install it on your Linux system and get it up and running.

Installing Annotator on Ubuntu or one of its derivatives is as simple as opening the terminal and entering the following commands:

sudo add-apt-repository ppa:ubuntuhandbook1/annotator
sudo apt update
sudo apt install com.github.phase1geo.annotator

You may get Annotator for Arch Linux by downloading it from the Arch User Repository in the following manner:

sudo yay -S annotator

You may use Flatpak to install Annotator on any other distribution of Linux that you may be using. To accomplish this, launch the terminal and type the following command to ensure that Flatpak is properly installed on your computer:

flatpak –version

If you receive a version number in response to this, it indicates that Flatpak is installed on your machine. If not, you do not have it, thus you will have to install it before anything else. Learn how to install Flatpak on your Linux machine by consulting our comprehensive installation guide.

After Flatpak has been installed, you may install Annotator by using the following command:

flatpak install com.github.phase1geo.annotator

How to Use Annotator

To get started, you should begin by opening the Annotator software that’s installed on your computer. Launching Annotator may be accomplished quickly and easily by selecting “Applications” from the drop-down menu, then searching for “Annotator.”

Now, when you launch Annotator, a welcome page will appear with two options for you to choose from: Open Image From File and Paste Image From Clipboard. You shouldn’t have any trouble understanding either of them, so choose the one that best fits your requirements.

If you pick the first option, the next page you see will ask you to choose an image file from the storage space on your computer that is dedicated to temporary files. On the other hand, selecting the latter option will cause the picture you have copied to the clipboard to be immediately pasted into Annotator when you click on it.

In either scenario, you will be transported to an edit window, which will include a taskbar that is tiled with all of the annotation and editing options.

In order to help you get more comfortable with these Annotator capabilities, we have provided you with a set of instructions on how to utilize them.

1. Add an Arrow

The majority of programs for manipulating images, such as Annotator, allow you to add arrows to your picture so that you may direct the viewer’s attention to a certain area of significance.

To add an arrow to your picture, you may do so by selecting the “Arrow” button, which is located at the very top of the toolbar. After that, choose the arrow by clicking on it and dragging it to the location on the picture that you like.

You may adjust its size by tapping on the arrow and dragging it along the boundaries of the window either inwards or outwards. In a similar manner, to alter its color, touch on it, click the Shape Color button (which is located third-last on the toolbar), and select a color from the drop-down menu that appears.

2. Add Shapes

In the same manner that you can add arrows, you can also add callouts to your photographs by making use of various shapes such as rectangles, circles, lines, stars, and the like. To utilize them in Annotator, go to the toolbar, click on the Shapes button (which is located next to the Arrow button), and then touch on a shape from the possibilities that are presented to you.

After you have inserted the form, you will have the option to adjust the color of its outline, just like you did with the arrows. If you have utilized a filled form, you have the option to modify the color of that shape as well.

Similarly, there is an option to add transparency to the form, which you can accomplish by toggling the Add Transparency option in the Shape Color menu. This function is analogous to a highlighter in that it allows you to add transparency to the shape.

Last but not least, Annotator gives you the option to customize the border around these callout objects. To accomplish this, go to the toolbar and choose the Shape Border option. Once you’re there, you’ll be able to adjust the border width and the dash pattern to suit your needs.

3. Add Text

The addition of text to your photographs is a helpful method that may be used to add crucial information or fill in lacking context. You may create a text block in Annotator by first selecting all of the choices that pertain to text by clicking on the Text button (which is represented by the letter a), and then typing your text in the box that appears.

The fact that Annotator provides users with a variety of text formatting choices is one of the program’s many useful features. Text can be formatted as a code block, a subscript, a superscript, bold, italic, strikethrough, or underlining by using this functionality.

In addition, the Font Properties button may be used whenever you want to make adjustments to the font’s appearance (the last option in the toolbar). You have the option of searching for the font of your choice or clicking on one of the ones that are provided to change the font family.

In a similar manner, you may change the size of the font by dragging the Size slider up or down. In any scenario, Annotator will provide you with a preview of the changes you make in the little preview window located at the bottom of the screen.

4. Magnify Important Details

Another feature that comes included with Annotator is a magnifier that allows you to zero in on certain areas of your image and enlarge them so that you may call attention to specific aspects of it.

Simply choose the Magnifier button on the toolbar if you would like to utilize the magnifier (with a plus sign). You should now see the magnifier overlaid on your image. Simply clicking the magnifier’s icon and dragging it over the specific detail you wish to enlarge will do this.

Additionally, Annotator has a few additional settings for its Magnifier—exactly three, to be more specific—which are denoted by little squares. The one on top of them enables you to manage the amount of zoom, the one in the middle lets you alter the magnification area, and the one on the bottom allows you to modify the size of the magnifier.

5. Blur Sensitive Details

When you need to conceal private details in an image, blurring it may be a helpful tool to utilize. This is especially true in situations where the image contains sensitive information.

To activate the blur tool, go to the toolbar and click on the button labeled “Blur.” After this, you may adjust the size of the blur region by using the extensions along its edges.

We believe that the Annotator’s blur strength is quite low, and we wished that the tool had an adjustable for the blur intensity.

6. Crop an Image

The ability to crop a picture is often included in most editing programs for manipulating images. You can eliminate sections or aspects of a picture that aren’t essential by using the cropping option in Annotator.

To utilize it, you must first bring up the cropping tool by clicking on the button labeled “Crop Image.” Then, choose the region that you wish to crop by using the extensions along the edges, and then click Enter to complete the cropping process.

7. Resize an Image

There may likely be occasions in which you want photos of a specific dimension. Annotator has your back owing to its built-in picture resizer, which enables you to resize photographs with a custom size and is therefore useful in these kinds of scenarios.

If you want to use this resizer, you may bring up the resizer window by clicking on the Resize Image button that is located in the toolbar.

In this section, input the width and height that you want the picture to have, and then click on the Scale Proportionality button (the one that looks like a padlock) to keep the aspect ratio the same.

You may also change the measurement from pixels to % at this point, as well as select the margins for your document. After you have completed all of the necessary steps, you may resize the image by selecting the option labeled “Resize.”

8. Export the Final Image

After you have finished making changes to your image, you will need to export it and then save it to your local system. You may accomplish the same thing with the assistance of the several export choices that Annotator provides.

To access these alternatives, go to the menu bar and click on the Export Image button. Then, from the list of available options, choose the one you want.

Annotator will now prompt you to give this file a name and select the directory in which you would want to save it. Once these steps have been completed, the file will be saved.

Follow these steps, and then click the Export button, to save the image with the modifications.

All the Necessary Annotation Features Consolidated Into One Location

If you’re someone who needs to edit or annotate a lot of images on your Linux machine, Annotator is probably one of the best image manipulation tools out there. It’s absolutely free to use, offers all the essential features you’d need, and is easy to use.

If you’re not a fan of standalone software, you can edit your images using the web browser with these free online image editing tools.

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