In my example image of my Cephalotus follicularis, also known as the Australian Pitcher Plant, it would take a very long time to get a perfect outline around the entire plant using the Eraser tool to do it all by hand. ![]() You don’t have to use the Eraser tool in order to get a transparent background in GIMP. Other Methods for Erasing to Transparency There are also some filters that can cause GIMP to add an alpha channel, such as the Color to Alpha filter, which automatically turns all the pixels of a specific color into transparent pixels.Īdditionally, some image types like the PNG format, which is most commonly used for transparent images, may automatically include an alpha channel although JPEGs and other common file types may need to have one explicitly added. How to Make a Background Transparent in GIMP. Whenever you create a new layer that has been filled with transparency, GIMP will automatically add an alpha channel to your image in order to handle the new transparent layer. There are also a couple of other situations where GIMP might automatically add an alpha channel for you. The first thing you have to do for this purpose is go to the layer panel, select the layer you want to have a transparent background, and make a right-click on. If you find that you’re working on an image that already has an alpha channel, you won’t need to bother with adding another one, and you can just skip right to Step 2 and start erasing to transparency right away. Click and drag to start erasing, and you’ll automatically be erasing to transparency! Step 2: Switch to the Eraser tool using the toolbox or by pressing the keyboard shortcut Shift+ E. After doing this I still had to do some erasing work in the gray background area, but this technique deleted probably 90-95 of the gray color properly, without pulling any color out of the black phone, which is very important. GIMP may take a few minutes to open if you haven't recently opened it. ![]() The GIMP app icon resembles a dog-like face holding a paint brush in its mouth. That would be preferably PNG, but GIF would work as well.The Channels panel now has four channels instead of the standard RGB Method 1 Making a Whole Image Transparent 1 Open GIMP. to a file format which supports transparency. įinally, export the transparent image with File → Export As. Once the desired transparency area is selected, simply hit. When this happens, use +Drag with a Select tool of your choice to select a subtractive selection area. In this case, and barely visible, nine desired pixels in the middle of the pipe were also selected for deletion. Some of the desired image area might be selected as well because the colour matched. ![]() In between, hit + to undo.Īt times, it proves difficult to get the colour selection exactly right. Again, run a few tries while adjusting Threshold for best results. Nonetheless, do experiment with these settings and choose what looks best. For this particular example I chose not to apply Antialiasing nor Feather edges. Do select BG colour fill and Sample merged and run a few tries while adjusting Threshold for best results. Within the Bucket Fill toolbox options, select Fill transparent areas only when necessary. This time around, do select Fill transparent areas as well as Sample merged. Select the bucket fill tool or hit Shift+ B. In this tutorial, Ill be going over how to remove a background of an image and make it. It might be tempting to perform Colour to Transparency, however this would also change semi-transparent areas within the desired image area. In this tutorial, Ill be going over how to remove a background of an image and make it transparent. The right thing to do now is Select → By Colour. However, one can also use the eyedropper tool to pick a colour from anywhere on the desktop. ![]() Here, I used f3f3e9 as a background colour for plain colour filling. (In this respect, Adobe Photoshop is no different.) Hence, choose a colour which is compatible with the background on which the resulting picture will eventually be used.Ĭlick on the background colour rectangle in the upper half of the Tool Options toolbox window to change the background colour. Some colour mixing will be inevitable and even desired. The next step is optional and consist in filling the area that should become transparent with a plain colour. This is done by selecting Layer → Tranparency → Add Alpha Channel. If this is the case, add an alpha transparency channel. Some image types lack a transparency channel JPG for example. Note: This tutorial is also available in PDF.
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