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GIMP Change Background Color

By Ravi KhatriRavi Khatri

GIMP Change Background Color

Introduction to GIMP Change Background Color

In this article, we are going to learn how to change the background color in GIMP. There are many reasons why you need to change the background. As if you want to take a subject and put it in another image or if you want to change the existing natural background to something more graphic or vector type of background. The main thing while changing the background is to preserve the realism of the image which we will look at in this article of how to achieve using a layer mask, cool effects, and some tweaks. Another use of changing the background is to bring more contrast between the subject and the background.

 

Step 1: First we will need some stock images which you can download from any stock image sites like Unsplash or pixels.

Step 2: Let’s start by opening an image by going in the file menu then open or press Ctrl + O

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GIMP Change Background Color 1

Step 3: Then navigate to the downloaded image and open in GIMP

GIMP Change Background Color 2

Step 4: If asked to convert to RGB Working space then convert it. In this case, this image already has a color profile embedded in it which will be mapped to GIMP built-in sRGB space.

GIMP Change Background Color 3

Step 5: After opening the image what we want to do is to remove the background. For that first, we will add an alpha channel to add some transparency.

GIMP Change Background Color 4

Step 6: Then use the foreground select tool and make sure feather edges is on with some radius to it which helps the things to blend into one another. Now make a rough outline of your subject which is our foreground and it will help us to separate it from the background.

GIMP Change Background Color 5

Step 7: Now we can change the size of the brush and the draw mode to draw foreground. Then roughly draw over on the subject it is not needed to be perfect. If the drawing is blue then you might have selected the background accidentally so make sure foreground mode is selected. Then make sure that the engine is Mattin Levin and the levels and active levels are set as shown and once you are ready hit the enter key and you will see the algorithm compute the pixels to separate the foreground from the background.

GIMP Change Background Color 6

Step 8: The algorithm has done a pretty good job but there are a few spots we can work on further.

GIMP Change Background Color 7

Step 9: You can zoom and draw on the area of the subject which you want to include in the foreground. The selection area can be cleaned in the next step so don’t worry to make it perfect. Then hit the enter key to make the selection.

GIMP Change Background Color 8

Step 10: Now go to your path panel if it is not open then open it from Windows -> Dockable Dialogs > Paths. Then there will be a path to selection button at the bottom of the paths panel and click it to create a path from the selection.

GIMP Change Background Color 9

Step 11: Now a selection is made in the path panel and then deselect the selection by pressing Ctrl + Shift + A. Then make the path visible from the path panel so you will be able to select it with path tool.

GIMP Change Background Color 10

Step 12: Now use path tool or press B and then select the path which will be indicated by the hand icon when hovered above the selection of path. You can see how many nodes it takes for the selection.

GIMP Change Background Color 11

Step 13: Once the path is selected you can make some fine adjustments by dragging the nodes. If you click ctrl and drag the point it will create a handle. If you click ctrl and click the line segment a node will be created.

GIMP Change Background Color 12

Step 14: Then add a layer mask.

GIMP Change Background Color 13

Step 15: Initialize it to selection and add.

step 14

Step 16: Now we can hide the path.

GIMP Change Background Color 14

Step 17: Then make sure that the background and foreground color are set to default values and then paint using the paintbrush tool. Black will hide and white will show. Make sure to reduce the brush hardness.

GIMP Change Background Color 15

Step 18: Then we will create a new layer from the layers panel and drag it at below the first layer.

new layer

Step 19: Then create a radial gradient using any two-color. By using the gradient tool and you can also swap color. Adjust the gradient as you want.

step 19

Step 20: Next we have changed one of the colors in the gradient.

step 20

Step 21: We can also add some shadows to create a realistic effect. For that first, we will go to the path panel and select the selection and click path to selection which will give us the selection of the subject.

step 21

Step 22: Then create a new layer for the shadow.

step 22

Step 23: For now bring the shadow above the main layer and switch to the bucket fill tool or press Shift + B and fill it with black while making sure that the foreground is black and then deselect it with Ctrl + Shift + A.

step 23

Step 24: Then use the move tool to offset it a bit and then drag the shadow layer below the main layer. Then we will make it look realistic using Gaussian Blur.

step 24

Step 25: Set the level of blur for x and y.

step 25

Step 26: You can also scale the shadow to make it away from the subject and decrease the opacity of the shadow layer to make it look realistic.

step 26

Step 27: Now we can use dodge/burn tool so that we can blend the shadows and subject. First, use the burn tool on the darker sides, and then if necessary, you can use dodge tool for highlights.

step 27

Step 28: At last export from the file menu.

step 28

Step 29: This is the finished art which can be obviously improved further but the technique will remain the same.

step 29

Conclusion

In this article, we have learned how we change background color in GIMP. Firstly, we have seen how to use the foreground select tool to select the subject then we have seen masking and then changing the background which is the basic steps apart from that you can add shadow and some more finesse by blurring to get a realistic blend of the subject with the background.

Recommended Articles

This is a guide to GIMP Change Background Color. Here we discuss the introduction and various steps to apply GIMP Change Background Color. You can also go through our other related articles to learn more –

  1. Change Background Color in Illustrator
  2. How to Change Artboard Size in Illustrator?
  3. Templates in Photoshop
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