Krita software in the Linux system tutorial

Krita is a bit of graphics editing software, including a painting program and photo editor, can handle the image, the following small series will introduce you how to use Krita under Linux The software processes the photos and is interested to learn about them.

Figure 1: pygmy goat Annabelle

Krita is a great drawing application, but also a very good photo editor. Today we will learn how to add text to an image and how to selectively sharpen a part of the photo.

Introduction to Krita

Similar to other drawing/drawing applications, Krita has hundreds of tools and options built in, as well as a variety of processing methods. So it's worth taking a moment to look at it.

Krita uses a dark theme by default. I don't really like dark themes, but fortunately Krita has other great themes that you can change at any time via the menu's "Settings" theme.

Krita uses a toolbar for window docking styles.

If the Dock toolbars on the left and right panels are not displayed, check the “Settings” toolbar. You can also press the toolbar in the “Settings” toolbar. Preferences are adjusted. But the hidden toolbars may make you feel a little uncomfortable. They only open in a small, flattened area, and you can't see anything in it. You can drag them to the top or one side of the Krita window to zoom in or out, even if you can drag them outside of Krita and place them anywhere on your display. If you drag one of the toolbars onto another, they will automatically merge into a single toolbar.

Once you have configured a satisfactory workspace, you can save it in “Select Workspace”. You can find “Select Workspace> on the right side of the Brush toolbar (via the "Settings] display toolbar" There are different configurations for the workspace, and of course you can create your own configuration (Figure 2).

Figure 2: & ldquo; choosing a workspace & rdquo; in save custom workspaces.

There are multiple zoom control methods in Krita. Ctrl + “=” Zoom in, Ctrl + “-” Zoom out, Ctrl + “0” Reset to 100% Zoom the screen. You can also control it by "View 》 Zoom & rdquo;, or the zoom bar in the lower right corner. There is also a drop-down zoom menu on the left side of the zoom bar.

The Tools menu is located on the left side of the window and contains sharpening and selection tools. You must move the cursor over each tool to see its label. The tool options bar always shows the options for the tool you are currently using. By default, the tool options bar is located at the right of the window.

Cutting Tools

Of course, there are cutting tools in the Tools menu bar and they are very easy to use. Circle the area you want to select, use the drag and drop method to adjust the selection, and click the Back button after the adjustment. In the tool options bar, you can choose whether to apply cropping to all layers, or just crop the current layer, by entering a specific value, or by percentage.

Adding text

When you want to add a label to a photo or explain such simple text, Krita may dazzle you because it has too many WordArt effects to choose from. It is. But Krita also supports adding simple text. Click on the text toolbar and you will see the tool options bar as shown in Figure 3.

Figure 3: Text option.

Click the expand button.

This will display the simple text tool; first draw a rectangular text box and then enter the text in the text box. The tool options bar has all the usual text formatting options: text selection, text size, text and background color, margins, and a range of graphic styles. But after you finish processing the text, click on the appearance processing tool. The button of the appearance processing tool is a white arrow. Next to the text tool button, you can adjust the overall size, appearance and position of the text through the appearance processing tool. Tool options for appearance processing tools include a variety of different lines, colors, and margins. Figure 4 is a photo of a happy title I sent to my relatives living in the city.

Figure 4: This green to farm it.

How do I handle the text that already exists on your photo? Click on the Appearance Processing tool and double-click in the text area. This will put the text into edit mode, as you can see from the cursor that appears in the text box. Now you can start selecting text, adding text, changing formatting, and more.

Sharpening Selections

Krita has many great tools for visual editing. In Figure 5 I want to sharpen Annabelle's face and eyes. (Annabelle lives next door, but she likes my dog ​​very much, stayed with me for a long time. My dog ​​ran because she was afraid of her, but she was not discouraged.) First through the "shape selection" ” The tool selects an area. Then open “Filter 》Enhanced Virtual Edge Mask”. You can adjust three variables: half-length, total, and threshold. Most image editing software has settings for radius, total, and threshold. The radius is half the diameter, so technically, “half-length” is correct, but it can cause unnecessary confusion.

Figure 5: Select any editing area.

The half-length value determines the thickness of the sharpened line. You need a large enough value to produce better results, but obviously, don't oversize.

The threshold determines the difference in effect between two pixels when sharpening. “0” is the maximum value of sharpening, “99” means no sharpening.

The total amount controls the sharpening intensity; the higher the value, the higher the sharpening.

Sharpening is basically the last step in your photo processing because it relates to everything you do with your photos: cropping, resizing, color, and color. . . If you sharpen it first and then do other things, your sharpening effect will be a mess.

Next, you have to ask, "What is the meaning of "virtualized mask"?" The name comes from the sharpening technique: the imaginary mask filter overlays a layer of blurred mask on the original image, and then stratifies the mask on top. This will result in a sharper and clearer image than direct sharpening.

The above is the introduction of the use of Krita under Linux. This article mainly introduces the sharpening of photos and the addition of text. Krita has other useful functions that you need to understand.